Mag-200 error loading bootstrap

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Thread: How to update firmware on MAG 250

Using a USB flash drive

On USB - drive, the file system FAT32, create a directory mag200 to STB MAG-200 and/or mag250/254 to STB MAG-250/254 (If your USB - drive multiple partitions, then use the first partition)
Update using bootstrap:
Written in the directory mag200(mag250/254) files imageupdate and bootstrap. For STB MAG-250/254 file bootstrap_250/254 renamed bootstrap.
Update not using bootstrap:
Written in the directory mag200(mag250/254) file imageupdate which taken from releases from MAG200/250/254.
If your STB MAG-200/250/254 several USB connectors then use to update the rear connector.

In the boot menu (BIOS)

On a USB drive should be two files imageupdate and bootstrap

Enter The BIOS
Select “Upgrade Tools”, pressing enter on the remote control to the right
Select “USB Bootstrap”
Connect the USB flash drive and click OK to confirm the beginning of the update process
Wait for the update, STB will reboot.

In an internal software

Go to “System settings” by pressing «Setup», «Services» or «SET» on the remote control (depending on the version the remote control)
Select “Software update”.
Select update “From USB” ⇒ “Start update”. If the preceding items are correct you will see a window with information about the current software version, select the drive or partition and the file path.
Select “Verify”. If the test is successful you'll see information about the availability of new versions of software.
Select “Start update” to begin the update.
After the update successful - STB must be rebooted.

Index of /mag250/release/0.2.18-r8 - http://soft.infomir.com.ua/mag250/release/0.2.18-r8/

Index of /mag254/release/0.2.18-r8 - http://soft.infomir.com.ua/mag254/release/0.2.18-r8/

Chapter 4. Bootstrap JavaScript Plugins

The components discussed in Chapter 3 are just the beginning. Bootstrap comes bundled with 13 jQuery plugins that extend the features and can add more interaction to your site. To get started with Bootstrap’s JavaScript plugins, you don’t need to be an advanced JavaScript developer. In fact, by utilizing Bootstrap Data API, most of the plugins can be triggered without writing a single line of code.

Bootstrap can be included on your site in two forms, either compiled or raw. In Bootstrap 2.2.2, the uncompressed file is 59KB and the minimized version is only 32KB. All of the Bootstrap plugins are accessible using the included Data API. With this, you don’t need to include a single line of JavaScript to invoke any of the plugin features.

Typically, JavaScript lies in a either a separate file or at the bottom of the page before the closing tag. You can either use the attribute to link to another file, or you can write the contents of the file between the opening and closing tags:

Generally, it is best to include all JavaScript calls into a check that ensures that the DOM has been loaded on the page. If you have the JavaScript trying to fire earlier, it may miss elements as the browser parses the page. With jQuery, adding a check is easily done by selecting the or the entire content of the page, and then applying the method:

As mentioned above, Bootstrap has a Data API where you can write data attributes into the HTML of the page. If you need to turn off the Data API, you can unbind the attributes by adding the following line of JavaScript:

If you need to disable a single plugin, you can do it programmatically using the namespace of the plugin along with the namespace:

The developers of Bootstrap believe that you should be able to use all of the plugins throughout the JavaScript API. All public APIs are single, chainable methods and return the collection acted upon.

All methods should accept an optional options object, a string which targets a particular method, or nothing (which initiates a plugin with default behavior).

The transition plugin provides simple transition effects. A few examples include:

  • Sliding or fading in modals
  • Fading out tabs
  • Fading out alerts
  • Sliding carousel panes

A modal is a child window that is layered over its parent window (see Figure 4-1). Typically, the purpose is to display content from a separate source that can have some interaction without leaving the parent window. Child windows can provide information, interaction, or more. I use them as a window for holding slideshows and login/registration information. The modal plugin is probably one of my favorite Bootstrap features.

To create a static modal window, use this code:

Modal headerOne fine body…CloseSave changes

Figure 4-1. Static modal window

To invoke the modal window, you need to have some kind of a trigger. Normally I use a button or a link. If you look in the code below, you will see that in the tag, the is the target of the modal that you want to load on the page. This code allows you to create multiple modals on the page and then have different triggers for each of them. Now, to be clear, you don’t load multiple modals at the same time, but you can create many on the page to be loaded at different times.

There are three classes to take note of in the modal. The first is , which is simply identifying the content of the as a modal. The second is , which tells the browser to hide the content of the until we are ready to invoke it. And last, the class. When the modal is toggled, it will cause the content to fade in and out.

Launch demo modal×Modal headerOne fine body…CloseSave changes

Using the Bootstrap JavaScript Data API, you simply need to pass a few data attributes to toggle the slideshow. To start with, set on the link or button that you want to use to invoke the modal and then set the to the ID of the modal that you’d like to use.

To call a modal with , use a single line of JavaScript:

Options can either be passed in via data attributes or with JavaScript. To use the data attributes, prepend to the option name (e.g., ). See Table 4-1 for descriptions of some modal options.

Table 4-1. Modal options

Name Type Default Description

backdrop

Boolean

true

Set to false if you don’t want the modal to be closed when the user clicks outside of the modal.

keyboard

Boolean

true

Closes the modal when escape key is pressed; set to false to disable.

show

Boolean

true

Shows the modal when initialized.

remote

path

false

Using the jQuery method, inject content into the modal body. If an with a valid URL is added, it will load that content.

The following are some useful methods to use with modals.

Activates your content as a modal. Accepts an optional options object.

Manually toggles a modal.

Manually opens a modal.

Manually hides a modal.

Bootstrap provides the events listed in Table 4-2 if you need to hook into the function.

Table 4-2. Modal events

Event Description

show

Fired after the method is called.

shown

Fired when the modal has been made visible to the user.

hide

Fired when the instance method has been called.

hidden

Fired when the modal has finished being hidden from the user.

As an example, after the modal is hidden, you could cause an alert to fire:

The dropdown was covered extensively in Chapter 3, but the interaction was glossed over. As a refresher, dropdowns can be added to the navbar, pills, tabs, and buttons.

To use a dropdown (Figure 4-2), add to a link or button to toggle the dropdown.

Figure 4-2. Dropdown within navbar

Here’s the code for developing a dropdown with data attributes:

Word MAKE magazineWordPress DevelopmentSSpeaking EngagementsSocial Media

If you need to keep links intact (which is useful if the browser is not enabling JavaScript), use the attribute along with :

Dropdown ...

Dropdown Usage via JavaScript

To call the dropdown toggle via JavaScript, use the following method:

The dropdown toggle has a simple method to show or hide the dropdown. There are no options:

The Scrollspy plugin (Figure 4-3) allows you to target sections of the page based on scroll position. In its basic implementation, as you scroll, you can add classes to the navbar based on the scroll position. To add the Scrollspy plugin via data attributes, add to the element you want to spy on (typically the body) and to the navbar that you want to apply the class changes to. For this to work, you must have elements in the body of the page that have matching IDs of the links that you are spying on.

Figure 4-3. Scrollspy example

For Scrollspy, you will need to add to the tag, along with that references the element that you are spying on:

...

In the navbar, you will need to have page anchors that will serve as indicators for the element to spy on:

Jake's BBQHomePorkBeefChicken

If you would rather invoke the scrollspy with JavaScript instead of using the data attributes, you can do so by selecting the element to spy on, and then invoking the function:

.scrollspy('refresh') Method

When calling the scrollspy via the JavaScript method, you need to call the method to update the DOM. This is helpful if any elements of the DOM have changed.

Options can be passed via data attributes or JavaScript. For data attributes, prepend the option name to , as in (see Table 4-3).

Table 4-3. Scrollspy option

Name Type Default Description

offset

number

10

Pixels to offset from top of page when calculating position of scroll.

The offset option is handy when you are using a fixed navbar. You will want to offset the scroll by about 50 pixels so that it reads at the correct time (see Table 4-4).

Table 4-4. Scrollspy event

Event Description

activate

This event fires whenever a new item becomes activated by the scrollspy.

Tabbable tabs were introduced in Chapter 3. By combining a few data attributes, you can easily create a tabbed interface (Figure 4-4). To do so, create the nav interface, and then wrap the content of the tabs inside a with a class of :

HomeProfileMessagesSettings............

Figure 4-4. Toggleable tabs

To enable the tabs, you can use the Bootstrap Data API or use JavaScript directly. With the Data API, you need to add to the anchors. The anchor targets will activate the element that has the class and relative ID. Alternatively, may be used instead of to apply the same action. Here is one way to enable tabs:

Here’s an example of different ways to activate tabs:

Tabs panes have two different events that can be hooked into, as shown in Table 4-5.

Table 4-5. Toggleable tab events

Event Description

show

This event fires on tab show, but before the new tab has been shown. Use and to target the active tab and the previous active tab (if available), respectively.

shown

This event fires on tab show after a tab has been shown. Use and to target the active tab and the previous active tab (if available), respectively.

Here’s a code example of a shown method:

For information about the method, refer to the jQuery website.

Tooltips (Figure 4-5) are useful when you need to describe a link or (used in conjunction with the tag) provide the definition of an abbreviation. The plugin was originally based on the jQuery.tipsy plugin written by Jason Frame. Tooltips have since been updated to work without images, animate with a CSS animation, and work with the Bootstrap JavaScript API.

Figure 4-5. Tooltip placement

To add a tooltip, add to an anchor tag. The title of the anchor will be the text of a tooltip. The following two examples show how to do this in the Bootstrap Data API and JavaScript, respectively:

Like all of the plugins, there are options that can be added via the Bootstrap Data API or invoked via JavaScript. All options need to have prepended to them. So, the option would become (see Table 4-6).

Table 4-6. Tooltip options

Name Type Default Description

animation

Boolean

true

Applies a CSS fade transition to the tooltip.

html

Boolean

false

Inserts HTML into the tooltip. If false, jQuery’s method will be used to insert content into the dom. Use text if you’re worried about XSS attacks.

placement

string/function

‘top’

Specifies how to position the tooltip (i.e., top, bottom, left, or right).

selector

string

false

If a selector is provided, tooltip objects will be delegated to the specified targets.

title

string/function

''

The title option is the default title value if the attribute isn’t present.

trigger

string

‘hover’

Defines how the tooltip is triggered: click, hover, focus, or manually.

delay

number/object

0

Delays showing and hiding the tooltip in ms—does not apply to manual trigger type. If a number is supplied, delay is applied to both hide/show. Object structure is:

Here are some useful methods for tooltips.

Attaches a tooltip handler to an element collection:

Reveals an element’s tooltip:

Hides an element’s tooltip:

Toggles an element’s tooltip:

Hides and destroys an element’s tooltip:

The popover (see Figure 4-6) is a sibling of the tooltip, offering an extended view complete with a heading. For the popover to activate, a user just needs to hover the cursor over the element. The content of the popover can be populated entirely using the Bootstrap Data API. This method requires a tooltip.

Figure 4-6. Popover placement

Use the following code for popover placement:

Click Me!

To enable the popover with JavaScript, use the function, passing in any options that you might need:

All options can be passed via the Bootstrap Data API, or directly with JavaScript (see Table 4-7).

Table 4-7. Popover options

Name Type DefaultDescription

animation

Boolean

true

Applies a CSS fade transition to the tooltip.

html

Boolean

false

Inserts HTML into the popover. If false, jQuery’s method will be used to insert content into the dom. Use text if you’re worried about XSS attacks.

placement

string

function

right

Specifies how to position the popover (i.e., top, bottom, left, right)

selector

string

false

If a selector is provided, tooltip objects will be delegated to the specified targets.

trigger

string

click

How the popover is triggered (i.e., click, hover, focus, manual)

title

string

function

''

Default title value if title attribute isn’t present

content

string

function

''

Default content value if data-content attribute isn’t present

delay

number

object

0

Delays showing and hiding the popover in ms—does not apply to manual trigger type. If a number is supplied, delay is applied to both hide/show. Object structure is: .

Here are some useful methods for popovers.

Initializes popovers for an element collection:

Reveals an element’s popover:

Hides an element’s popover:

Toggles an element’s popover:

Hides and destroys an element’s popover:

With the Data API, it is easy to add dismiss functionality to alert messages (Figure 4-7).

Figure 4-7. Error alert message

You can close an alert manually with the JavaScript method or use data attributes in conjunction with an anchor or button.

Here is how to dismiss via JavaScript:

Here is how to dismiss via Data API:

To enable all alerts to be closed, add the following method. To enable alerts to animate out when closed, make sure they have the and class already applied to them.

There are two events that can be tied to Bootstrap’s class as shown in Table 4-8.

Table 4-8. Alert class events

Event Description

close

This event fires immediately when the close instance method is called.

closed

This event is fired when the alert has been closed (will wait for CSS transitions to complete).

As an example, if you wanted to trigger a function after an alert has closed, you could use this function:

Buttons were introduced in Chapter 3. With Bootstrap, you don’t need to do anything to make them work as links or as buttons in forms. With this plugin you can add in some interaction, such as loading states or button groups with toolbar-like functionality.

To add a loading state to a button (shown in Figure 4-8), simply add as an attribute to the button:

Submit!

When the button is clicked, the class is added, giving the appearance that it can no longer be clicked.

Figure 4-8. Loading button

When clicking on a button with the attribute (Figure 4-9), a class of is added:

Toggle

Figure 4-9. Toggle button

Buttons can work like checkboxes (as in Figure 4-10), allowing a user to select many of the options in a button group. To add this function, add for checkbox style toggling on :

LeftMiddleRight

Figure 4-10. Checkbox buttons

Radio buttons (Figure 4-11) function similarily to checkboxes. The primary difference is that a radio button doesn’t allow for multiple selections—only one button in the group can be selected. To add radio-style toggling on , add :

LeftMiddleRight

Figure 4-11. Radio buttons

The method can be applied to any class or ID. To enable all buttons in the via JavaScript, add the following code:

The following methods are useful to use with buttons.

Toggles push state. Gives the button the appearance that it has been activated:

When loading, the button is disabled and the text is changed to the option from the attribute:

...

Resets button state, bringing the original content back to the text. This method is useful when you need to return the button back to the primary state:

String in this method is referring to any string declared by the user:

To reset the button state and bring in new content, use the string method:

...

The collapse plugin makes it easy to make collapsing divisions of the page (see Figure 4-12). Whether you use it to build accordion navigation or content boxes, it allows for a lot of content options.

Figure 4-12. Accordion

The following code creates collapsible groups:

Collapsible Group Item #1 Anim pariatur cliche... Collapsible Group Item #2 Anim pariatur cliche... ...

You can also use the data attributes to make all content collapsible:

simple collapsible …

Like all of the plugins that use the Data API, you can add all needed markup without writing any JavaScript. Add and a to the element to automatically assign control of a collapsible element. The attribute will accept a CSS selector to apply the collapse to. Be sure to add the class to the collapsible element. If you’d like it to default open, include the additional class .

To add accordion-like group management to a collapsible control, add the data attribute .

The collapse method can activated with JavaScript as well:

The options listed in Table 4-9 can be passed via data attributes or with JavaScript.

Table 4-9. Collapse options

Name Type Default Description

parent

selector

false

If selector, then all collapsible elements under the specified parent will be closed when this collapsible item is shown. (Similar to traditional accordion behavior.)

toggle

Boolean

true

Toggles the collapsible element on invocation.

The following methods are useful to use with collapsible elements.

Activates your content as a collapsible element. Accepts an optional options object:

Toggles a collapsible element to shown or hidden:

Shows a collapsible element:

Hides a collapsible element:

There are four events that can be hooked into with the collapse plugin, described in Table 4-10.

Table 4-10. Collapse events

Event Description

show

This event fires immediately when the instance method is called.

shown

This event is fired when a collapse element has been made visible to the user (will wait for CSS transitions to complete).

hide

This event is fired immediately when the method has been called.

hidden

This event is fired when a collapse element has been hidden from the user (will wait for CSS transitions to complete).

After a has been collapsed, you could use the following code to execute a function:

The Bootstrap carousel (Figure 4-13) is a flexible, responsive way to add a slider to your site. In addition to being responsive, the content is flexible enough to allow images, iframes, videos, or just about any type of content that you might want.

Figure 4-13. Carousel

The following code creates the Bootstrap carousel:

………

To implement the carousel, you just need to add the code with the markup above. There is no need for data attributes, just simple class-based development. You can manually call the carousel with JavaScript, using the following code:

Options can be passed through data attributes or through JavaScript. The options are listed in Table 4-11.

Table 4-11. Carousel options

Name Type Default Description

interval

number

5000

The amount of time to delay between automatically cycling an item. If false, carousel will not automatically cycle.

pause

string

“hover”

Pauses the cycling of the carousel on mouseenter and resumes the cycling of the carousel on mouseleave.

The following methods are useful carousel code.

Initializes the carousel with an optional object and starts cycling through items:

Cycles through the carousel items from left to right:

Stops the carousel from cycling through items:

Cycles the carousel to a particular frame (0-based, similar to an array):

Cycles to the previous item:

Cycles to the next item:

The carousel has two events that can be hooked into, described in Table 4-12:

Table 4-12. Carousel events

Event Description

slide

This event fires immediately when the slide instance method is invoked.

slid

This event is fired when the carousel has completed its slide transition.

Typeahead allows you to easily create typeahead inputs in forms (Figure 4-14). For example, you could preload states in a state field or, with some JavaScript, get search results using some AJAX calls.

Figure 4-14. Typeahead

Using Data API, you can add sources via the attribute. Items should be listed in either a JSON array or a function:

To call directly with JavaScript, use the following method:

Table 4-13 shows a list of options.

Table 4-13. Carousel options

Name Type Default Description

source

array, function

[ ]

The data source to query against. May be an array of strings or a function. The function is passed through two arguments: the value in the input field and the callback. The function may be used synchronously by returning the data source directly or asynchronously via the callback’s single argument.

items

number

8

The maximum number of items to display in the dropdown.

minLength

number

1

The minimum character length needed before triggering autocomplete suggestions.

matcher

function

case insensitive

The method used to determine if a query matches an item. Accepts a single argument, the item against which to test the query. Accesses the current query with . Return a Boolean true if query is a match.

sorter

function

exact match, case sensitive, case insensitive

Method used to sort autocomplete results. Accepts a single argument item and has the scope of the typeahead instance. Reference the current query with .

updater

function

returns selected item

The method used to return the selected item. Accepts a single argument item and has the scope of the typeahead instance.

highlighter

function

highlights all default matches

Method used to highlight autocomplete results. Accepts a single argument item and has the scope of the typeahead instance. Should return HTML.

The affix plugin allows a to become affixed to a location on the page. A common example of this is social icons. They will start in a location, but as the page hits a certain mark, the will become locked in place and will stop scrolling with the rest of the page.

To apply the affix plugin to a , you can use either data attributes, or you can use JavaScript directly. Note that you must position the element so that it can be affixed to the page. Position is controlled by the attribute, using either , , or . You then use the to calculate the position of the scroll.

...
Name Type Default Description

offset

number/function/object

10

Pixels to offset from screen when calculating position of scroll. If a single number is provided, the offset will be applied in both top and left directions. To listen for a single direction or multiple unique offsets, just provide an object . Use a function when you need to dynamically provide an offset (useful for some responsive designs).

-webkit-overflow-scrolling

Non-standard: This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.

The CSS property controls whether or not touch devices use momentum-based scrolling for a given element.

Syntax

Values

Use "regular" scrolling, where the content immediately ceases to scroll when you remove your finger from the touchscreen.

Use momentum-based scrolling, where the content continues to scroll for a while after finishing the scroll gesture and removing your finger from the touchscreen. The speed and duration of the continued scrolling is proportional to how vigorous the scroll gesture was. Also creates a new stacking context.

Formal definition

Formal syntax

-webkit-overflow-scrolling = auto touch

Examples

HTML

CSS

Results

Specifications

Not part of any standard. Apple has a description in the Safari CSS Reference.

Browser compatibility

BCD tables only load in the browser

See also

Iptv mag 250 pirated firmware with passwords. Firmware for iptv set-top boxes mag200, mag250. Official software from the manufacturer

The firmware takes place in 2 stages - the firmware of the intermediate version in bootloader mode and the upgrade to current version through the Internet.

To flash an intermediate version, you need to download the firmware and update utilities:

We unpack the archive - we see 3 files in the folder.

Run mcast.exe. If you have multiple interfaces, you must select the wired network card... The address is usually 192.168.x.y

In the next dialog, you need to select the bootstrap and imageupdate files from the unpacked archive.

Choose an item Upgrade Tools and right arrow open the update menu.

There we select the item MC Upgrade and press the right arrow.

The prefix will show the Multicast address, which must be entered in the first IP field in the program mcast.exe

We only change Stream 1, IP address, port: 224.50.0.50:9000 from the previous picture. We do not touch the second address. And push the buttons start

A couple of minutes after the cursor starts running, the STB will inform you about the successful loading of the first file.

You will need to wait a few minutes for the firmware itself to load:

After that, the console will reboot itself.

The first stage of the firmware ends here.

At the second stage, when loading, click on the button SETUP to download the final firmware.

We go to the section Settings

And select the item Update software now.

Selecting an item Refresh

And we agree to automatic updates firmwares in the future.

The STB will automatically reboot.

And it will show a window for entering credentials for iptv, which can be obtained in your personal account.

To enter a dot symbol, by pressing OK on the remote, you can call up the on-screen keyboard.

1. You need to download the factory firmware:

2. Download 2 files Bootstrap_250 / 254 / 270.clean and imageupdate
3. Rename the file Bootstrap_250 / 254 / 270.clean v Bootstrap
4. The downloaded files must be placed in the root of the usb drive (On the USB drive, there must be file systemFAT32) (Example: usb drive G: \ mag250 \), there should be 2 files in the mag250 folder: Bootstrap and imageupdate.
5. Turn off the power from the set-top box (from the outlet or from the set-top box itself).
6. Next, insert the usb drive into the connector on the back of the set-top box.
7. Turn on the power console and immediately after switching on, press the button "Menu" on the remote control to access the firmware system menu. If everything is done correctly, the screen should look like the one shown in the picture.

1.In this menu sequentially select items Upgrade Tools -> USB Bootstrap.

2. Then press the button "OK" on the remote to run the firmware.

After successful flashing, the set-top box will reboot automatically and boot already with the new firmware.
Please note that in some cases a situation is possible when the set-top box will not "see" the firmware on the USB flash drive when flashing. The easiest option in this case is to try the described items with another flash drive.

Infomir has released updated firmware for its products - set-top boxes MAG245 / 250, MAG254 / 255, MAG270, MAG275.

Please note: when building an image based on this version, it is imperative to use a new kernel.

Player

The teletext operation has been significantly improved, including the problems with the detection of languages, encodings, display on the screen, and display of some symbols have been fixed.
Added support for HD DVB and PGS subtitles.
Fixed positioning errors for DVB subtitles.
Added "fcc2" solution for fast switching channels from special streamers.
Added support for EXT-X-BYTERANGE in HLS.
Fixed artifacts when switching speed on encrypted RTSP streams.
Fixed artifacts after positioning on encrypted RTSP streams.
Corrected abnormal termination applications if some tracks were not detected during HLS playback.
Fixed crash when installing the wrong font for subtitles.
Fixed stopping of HLS stream playback immediately after the first chunk upload error.
Fixed incorrect detection of aspect ratio when playing some H264 videos.
Fixed too long stopping time for HLS playback.
Fixed error with TimeShift after launching TimeShift on non-working URLs.
Reduced load on the processor when working with the network.

For MAG245 / 250
Fixed delays when playing some HD streams.

For MAG254 / 255

Added support for PiP.
Added support for minimum power consumption mode.

For MAG270 and MAG275
Fixed "freeze" of the set-top box when turning off some types of TVs when connected via HDMI.
Fixed scanning for DVB-C.
Fixed bug when setting SymbolRate for DVB-C.
Added support for multiple PlPIds at one frequency for DVB-T2.
Added support for PiP.
Improved DVB-C performance.

Browser

Added service "ntp" so that NTP can be restarted from JS.

Added the ability to view open NFS folders on the network.
Added support for the new extended JS API.
Added redirection of virtual keyboard buttons to the WebFace window (from the Internet browser window).
Fixed incorrect handling of some buttons on the external keyboard in the Internet browser window.
Improved SAMBA support.

Internal portal

Speed ​​test enabled.
Updated localization.
Fixed teletext forcing settings.
Fixed changing the city in the weather and displaying the weather in case of loading delay.
Fixed the order of items in the main menu.
Fixed display of URL in preview mode if URL includes solution.
Fixed playback after exiting standby.
Fixed an incorrect message after the end of the update.
Fixed display of update messages in standalone update mode.
Fixed TimeShift flag for auto-updating channels.
Fixed NFS mount status.
Coding style fixes, strict mode enabled.
Added indication of dual mono.
Added the ability automatic translation in standby.
Added update logs.
Added a button to force the update after an error.
Added the ability to set the program index in the MPTS file.
Removed Google URL from ping list.
Removed games from the main menu
Removed links to YouTube, Picasa from the main menu.

Other fixes and improvements

Improved Wi-Fi support, including added support new Wi-Fi adapters.

For a list of supported Wi-Fi adapters, see

Fixed lack of WEP support for Wi-Fi adapters.
Fixed behavior of Chroma Key, TransparentColor and setmode, which, when used incorrectly, began to make the graphic layer transparent.
Fixed settings Wi-Fi drivers adapters.
Fixed large memory leak in WebKit (for MAG245 / 250).

Fixed bug where NTP does not work if privileged ports are closed on the network.

If the NTP server is not set either manually or via DHCP, then pool.ntp.org will be temporarily installed as the NTP server.

Using the MAG 250 attachment as an example

1.

First you need to download the correct firmware version. For this:

  • Go to the site soft.infomir.com.ua
  • Select the required model from the proposed list, i.e. MAG250
  • In the list of folders that appears, select release /
  • Next choose 0.2.18-r22(the name 0.2.18-r22 is valid on 03/09/18 - with a subsequent firmware update this folder may be called differently)
  • In the list that appears for downloading, select (left-click) the items Bootstrap_250 and

2.

Next, you need to rename the downloaded files. To do this, right-click on the file name and from context menu select value Rename... The final name of the files should look like this: Bootstrap and imageupdate respectively.

3.

Preparing usb media for firmware. We format it in FAT32... Create a folder on the drive. The folder name must correspond to the model of your set-top box. We indicate the name in lowercase Latin letters, without spaces - mag250

4.

Copy both firmware files to the created folder Bootstrap and imageupdate.

5.

6.

Disconnect the set-top box from the power supply, turn on and hold down the button Menu on the remote. Then the bootloader menu will appear on the screen.

7.

If in the menu that appears, the first item is not TV Sistem, a Upgrade Menu- select item Upgrade Menu by pressing a button To the right... Otherwise, go to the next item.

8.

In the menu that opens, using the button Down select item Upgrade Tools and activate it with the button To the right.

9.

In the menu that opens, activate the item USB Bootstrap button To the right.

If after the actions taken, the set-top box did not boot, or the flashing process was not completed correctly, then disconnect the set-top box from the power supply, turn on while holding the "menu" button until blue screen and change the Boot Mode value from NAND to NAND2, or vice versa. And repeat the software update process.

After downloading the set-top box, you will be taken to the internal portal, you need to go to Settings and further on System settings, then to advanced settings - Advanced settings(point with a picture of a screwdriver and a wrench) - and in the first field, change the language to Russian using the arrows on the remote control.
Then restore all settings as after a normal reset.


When the error “Your STB's firmware is outdated” appears on the TV screen. Please update it. " or just to update the software version of your set-top box, you need to do the following:

1. To reboot the set-top box, for this you need to unplug the power cord from the socket on the back of the set-top box (or the power supply unit from the electrical outlet) for a few seconds and insert it back.

Make sure the STB starts loading

2. Wait for the appearance of the inscription “Loading the portal ... Press MENU to go to the portal selection menu” (see point 3a) or “Press SET to go to the internal portal” (see point 3b). The message may differ depending on the version software your console.


ATTENTION! This message appears for a very short time (3-5 seconds).

3a. If the inscription "Loading the portal ... Press MENU to go to the portal selection menu" appears, press the MENU key on the remote control and select the item " System settings»In the menu that opens

3b. If the message “Loading the portal ... Press SET to go to the internal portal” appears, press the SET (or SETUP) key on the remote control. In the embedded portal that opens, select the "Settings" icon


On the settings screen, select the "System settings" menu item

5. Press the "OK" button on the remote control to check for an update

6. After checking, press the "F1" (red) button on the remote control


ATTENTION. It is necessary to update the firmware even if the software versions are the same

7. Wait until the end of the update (may take up to 5 minutes)

8. After the update, the set-top box will reboot. And you can start watching.

Attention! If after updating the firmware the error “Your STB's firmware is outdated. Please update it. ", Then most likely your console has a strong outdated version Software and it is necessary to repeat all actions starting from point 1.

Used By

  • Dead simple Include prism.css and prism.js, use proper HTML5 code tags (), done!
  • Intuitive Language classes are inherited so you can only define the language once for multiple code snippets.
  • Light as a feather The core is 2KB minified & gzipped. Languages add 0.3-0.5KB each, themes are around 1KB.
  • Blazing fast Supports parallelism with Web Workers, if available.
  • Extensible Define new languages or extend existing ones. Add new features thanks to Prism’s plugin architecture.
  • Easy styling All styling is done through CSS, with sensible class names like, etc

Prism is used on several websites, small and large. Some of them are:

The Prism source, highlighted with Prism (don’t you just love mag-200 error loading bootstrap meta this is?):

This page’s CSS code, highlighted with Prism:

This page’s HTML, mag-200 error loading bootstrap, highlighted with Prism:

This page’s logo (SVG), highlighted with Prism:

If you’re still not sold, you can view more examples or try it out for yourself.

  • Only 2KB minified & gzipped (core). Each language definition adds roughly 300-500 bytes.
  • Encourages good author practices. Other highlighters encourage or even force you to use elements that are semantically wrong, like (on its own) or. Prism forces you to use the correct element for marking up code:. On its own for inline code, or inside a for blocks of code. In addition, the language is defined through the way recommended in the HTML5 draft: through a class.
  • The class is inherited. This means that if multiple code snippets have the same language, you can just define it once,in one of their common ancestors.
  • Supports parallelism with Web Workers, if available. Disabled by default (why?).
  • Very easy to extend without modifying the code, due to Prism’s plugin architecture. Multiple hooks are scattered throughout the source.
  • Very easy to define new languages. The only thing you need is a good understanding of regular expressions.
  • All styling is done through CSS, with sensible class names rather than ugly, namespaced, abbreviated nonsense.
  • Wide browser support: Edge, IE11, Firefox, mag-200 error loading bootstrap, Chrome, Safari, Opera, most mobile browsers.
  • Highlights embedded languages (e.g. CSS inside HTML, JavaScript inside HTML).
  • Highlights inline code as well, not just code blocks.
  • It doesn’t force you to use any Prism-specific markup, not even a Prism-specific class name, only standard markup you should be using anyway. So, you can just try it for a while, remove it if you don’t like it and leave no traces behind.
  • Highlight specific lines and/or line ranges (requires plugin).
  • Show invisible characters like tabs, line breaks etc (requires plugin).
  • Autolink URLs and emails, use Markdown links in comments (requires plugin).
  • Any pre-existing HTML in the code will be stripped off. There are ways around it though.
  • Regex-based so it *will* fail on certain edge cases, which are documented in the known failures page.
  • Some of our themes have problems with certain layouts. Known cases are documented here.
  • No IE 6-10 support. If someone can read code, they are probably in the 95% of the population with a modern browser.

You will need to include the and files you downloaded in your page. Example:

Prism does its best to encourage good authoring practices. Therefore, it only works with elements, since marking up code without a jailbreak 5.0.1 error shsh blobs element is semantically invalid. According to the HTML5 spec, the recommended way to define a code language is a class, which is what Prism uses. Alternatively, Prism also supports a shorter version: .

The recommended way to mark canon mf8180c error codes a code block (both for semantics and for Prism) is a element with a element inside, like so:

If you use that pattern, the will automatically get the class (if it doesn’t already have it) and will be styled as a code block.

Inline code snippets are done like this:

Note: You have to escape all and characters inside elements (code blocks and inline snippets) with and respectively, or else the browser might interpret them as an HTML tag or entity. If you have large portions of HTML code, you can use the Unescaped Markup plugin to work around this.

Language inheritance

To make things easier however, Prism assumes that the language class is inherited. Therefore, if multiple elements have the same language, you can add the class on one of their common ancestors. This way, you can also define a document-wide default language, by adding a class on the or element.

If you want to opt-out of highlighting a element that inherits its language, you can add the class to it. The language can also be inherited to disable highlighting for the element with the class and all of its descendants.

If you want to opt-out of highlighting but still use plugins like Show Invisibles, add use class instead.

Manual highlighting

If you want to prevent any elements from being automatically highlighted and instead use the API, you can set to before the event is fired. By setting the attribute on the element containing Prism core, this will be done automatically, mag-200 error loading bootstrap. Example:

or

Usage with CDNs

In combination with CDNs, we recommend using the Autoloader plugin which automatically loads languages when necessary.

The setup of the Autoloader, will look mag-200 error loading bootstrap the following. You can also add your own themes of course.

Please note that links in the above code mag-200 error loading bootstrap serve as placeholders. You have to replace them with valid links to the CDN of your choice.

CDNs which provide PrismJS are e.g. cdnjs, jsDelivr, and UNPKG.

Usage with Webpack, Browserify, & Other Bundlers

If you want to use Prism with a bundler, install Prism with :

You can then into your bundle:

To make it easy to configure 10.0001 supply error Prism instance with only the languages and plugins you need, use the babel plugin, babel-plugin-prismjs. This will allow you to begin error report 7fe0271 deutsch the minimum number of languages and plugins to satisfy your needs. See that plugin's documentation for configuration details.

Usage with Node

If you want to use Prism on the mag-200 error loading bootstrap or through the command line, Prism can be used with Node.js as well, mag-200 error loading bootstrap. This might be useful if you're trying to generate static HTML pages with highlighted code for environments that don't support browser-side JS, like AMP pages.

Example:

Requiring will load the default mag-200 error loading bootstrap, and. You can load more languages with the utility, which will automatically handle any required dependencies.

Example:

Note: Do not use with Webpack or another bundler, as this will cause Webpack to include all languages and plugins. Use the babel plugin described above.

Note: will ignore unknown languages and log warning messages to the console. You can prevent the warnings by setting .

This is the list of all languages currently supported by Prism, with their corresponding alias, to use in place of in the (or ) class:

Couldn’t find the language you were looking for? Request it!

Plugins are additional scripts (and CSS code) that extend Prism’s functionality. Many of the following plugins are official, but are released as plugins to keep the Prism Core small for those who don’t need the extra functionality.

No assembly required to use them. Just select them in the download page.

It’s very easy to write your own Prism plugins. Did you write a plugin for Prism that you want added to this list? Send a pull request!

Several tutorials have been written by members of the community to help you integrate Prism into multiple different website types and configurations:

Please note that the tutorials listed here are not verified mag-200 error loading bootstrap contain correct information. Read at your risk and always check the official documentation here if something doesn’t work :)

Have you written a tutorial about Prism that’s not already included here? Send a pull request!

Handling Exceptions Returned from the Web API

In the last two articles about CRUD and HTML (CODE Magazine, November/December 2015 and January/February 2016), you created a product information page to display a list of product data returned from a Web API. In addition, you built functionality to add, update, and delete products using the same Web API controller. In those two articles, there was a very basic exception handler function named. This function displays error information returned from the API in an alert dialog on your page, as shown in Figure 1.

Figure 1: An alert dialog is just one way to display error messages to <b>mag-200 error loading bootstrap</b> user.

In this article, I'll expand upon the interface you learned about in the last article (CODE Magazine, January/February 2016), mag-200 error loading bootstrap. You'll learn to determine what kind of error is returned from your Web API call and display different messages based on those errors. You'll learn to how to return 500, 404, and 400 exceptions and how to handle them on your Web page.

Basic Exception Handling in the Web API

If you remember from the last article, the Web API 2 provides a new interface called that you use as the return value for all your methods. This interface is built into the class (from which your class inherits) and defines helper methods to return the most common HTTP status codes such as a 202, 201, 400, 404, mag-200 error loading bootstrap, and 500. There are a few different methods built-in to the MVC Controller class that you assign to your return value. These methods and the HTTP status code they return are shown in the following list.

  • OK: 200
  • Created: 201
  • BadRequest: 400
  • NotFound: 404
  • InternalServerError: 500

Each method in your controller should return one of the codes listed above. Each of these methods implements a class derived from the interface. When you return an OK from your method, a 200 HTTP status code is returned, which signifies that no error has occurred. The method, used in the method, returns a 201 which means that the method succeeded in creating a new resource. The other three return values all signify that an error has occurred, mag-200 error loading bootstrap, and thus call the function specified in the error parameter of your Ajax. A typical Ajax call is shown mag-200 error loading bootstrap next snippet is the function from the January/February) article. This function extracts different properties from the request parameter and displays all of the values in an alert dialog, mag-200 error loading bootstrap. A newline-delimited string displays each value - Code, Text, mag-200 error loading bootstrap, and Message - on a separate line in the alert dialog. There's no distinction in this function between 400, 404, or 500 errors.

BadRequest: 400 Error

A 400 error, mag-200 error loading bootstrap, BadRequest, is used when you have validation errors from data posted back by the user. You pass a object to the method and it converts that dictionary into JSON which, in turn, is passed back to your HTML page. Within the new function, you're going to write, parse the dictionary of validation errors, and display the messages to the user.

NotFound: 404 Error

A 404 error is generated by a Web server when a user requests a page, or other resource, that is not valid on that Web server. When writing your Web API, use a 404 to generate an error to inform the programmer calling your API that they have requested a piece of data that's not available in your data store. For example, they may pass the following request to your method; api/Product/999. If there is no product mag-200 error loading bootstrap a primary key of 999 in your database, return a mag-200 error loading bootstrap error to the HTML page so the programmer can inform the user that they requested data that isn't available.

InternalServerError: 500 Error

I'm sure that you've seen the dreaded 500 error come back from your Web application at some point or another while developing your error 629 vpn connection. A 500 error is returned when there's an unhandled exception in your application. You should always handle all of your exceptions yourself, but you still might wish to pass back a 500 to the HTML page. If you do, I suggest that you supply as much information about why a 500 is being returned as you can. Don't just let the .NET Framework dump their generic, and often unhelpful, error message back to the consumer of your Web API.

Unhandled Exceptions

To illustrate what happens when you have an unhandled exception in your Web API, open the and locate the method that returns a list of all products. Simulate an unhandled exception by adding the following lines of code at the top of this method.

When you run the Web page and it tries to load all of the product data into the table on the Web page, mag-200 error loading bootstrap, a 500 error is sent back to the client. NOTE: You might need to turn off the “Break when an exception is User Unhandled” from the Debug > Exceptions menu prior to running this code.

Modify the function (Listing 1) on your Web page to handle a 500 exception. Add a switch.case statement to the function. The first mag-200 error loading bootstrap you add is 500. You'll add more cases later in this article. When a 500 exception is received, grab the property from the property on the request parameter, mag-200 error loading bootstrap. The property contains the message from the .NET Exception object. For the case of the code you added to the controller, the message is “Attempted to divide by zero,” as shown in Figure 1.

Listing 1: Add a case statement to the handleException function to display the 500 error.

After running this code and seeing the error, be sure to remove the three lines that cause the error so you can move on and try out the rest of the error handling in this article.

Return InternalServerError for Handled Exceptions

Instead of letting the divide-by-error exception go unhandled, let's explicitly return a 500 exception using the method. Open the file and locate mag-200 error loading bootstrap method. Add the same three lines within a try.catch block, as shown in Listing 2, to simulate an error, mag-200 error loading bootstrap. Create two catch blocks: one to handle a and one to handle a generic Exception object. By catching an explicit object, you can pass back a more specific error message to the HTML page.

Listing 2: Return the IHttpActionResult InternalServerError() when you want to control the 500 error coming back from the Web API.

After writing this code, run the application and click on any of the Edit buttons in the HTML table, mag-200 error loading bootstrap. You should now see the custom message that you wrote appear in the alert dialog on the page. Once again, after you see the error appear and you're satisfied that it's mag-200 error loading bootstrap correctly, remove the three lines of code so you can move on with the rest of the article.

Handling Validation Errors with BadRequest

As you know, mag-200 error loading bootstrap, you can't trust user data. Even if you have jQuery validation on your page, you can't guarantee that the validation ran. Thus, you need to perform validation of your data once it's posted back to your Web API. There are many ways to validate your data once it's posted back. One of the most popular methods today is to use Data Annotations. If you're using the Entity Framework (EF), mag-200 error loading bootstrap, data annotations are added to the entity class automatically, mag-200 error loading bootstrap. I'm not going to cover data annotations in this article, as I assume that you already know how to use those. If you don't, there are many articles available on the usage of data annotations.

You may find cases where you just can't accomplish the validation you need using data annotations. In those cases, perform data validation using traditional C# code. Create a to hold your validation error messages, or add to the returned from the EF engine. Open the and add the following Using statement at the top of the file.

You need to create an instance of a class to hold your validation messages. Create a private field, namedin the class.

Build a method, namedto check the product data passed a drive error your Web API from an HTML page. Add a couple of checks for business rules, as shown in the code snippet below. Yes, these simple business rules can be done with data annotations, but I want to show you how to add custom rules.

In the counter strike anti terror.ru you wrote in the last article, you added the new product data to the collection of products. Modify the method to call the method you just wrote to see if all of the business rules passed prior to adding the product to the list (see Listing 3).

Listing 3: Check business rules mag-200 error loading bootstrap to adding a product to your database and your list.

Now that you have the method calling the new method, modify the method, as shown in Listing 4, mag-200 error loading bootstrap. If the method returns a value, write code in the mag-200 error loading bootstrap statement to return a with the collection of validation messages generated by the method.

Listing 4: Send BadRequest back to client with any validation messages.

The property, which is a object, gets serialized as JSON when it's sent back to the front end. In your HTML page you'll need to extract the error messages. The easiest way is to create a function, namedas shown in Listing 5.

Listing 5: Use JSON.parse to create a jQuery array of ModelState objects.

This method calls to convert the JSON returned from the Web API into a JSON object that contains an array in a property namedmag-200 error loading bootstrap. You loop through the array and extract each error message from the object and add that message to a new array named errors. This array is returned from this function and will be used to display the errors on the Web page.

Open your Index.cshtml page and locate the function. Add a new Case statement to handle these validation errors. What you add to the function is shown in the next code snippet.

In this Case statement, call the function passing in the that contains the JSON string returned from the Web API. Loop through the array of errors returned, and place a new line character at the end of each one, and concatenate to the variable. This variable is then displayed in the alert.

In this article, I'm appending error messages together to display in an alert dialog box. Feel free to modify this code to display the messages in any fashion you want. For instance, you might choose to create a bulleted list in a Bootstrap well to which you add the error messages. Or, you might display them in a Bootstrap pop-up dialog box. You're only limited by your own imagination.

Handling Data Not Found

When working in a multi-user environment, it's possible for one user to delete a record, but another wants to view or update that record after it's already been deleted. In that case, you need to inform the second user that the record they were trying to locate could not be found. You do this using returning the 404 status code using the methodas shown in Listing 6, mag-200 error loading bootstrap. This is the same method shown earlier in this article, except adobe premiere pro import generic error I've removed the catch block for the. If you search for the value contained in the ID parameter in the product list and you don't find it, set the return variable to the object returned from the method.

Listing 6: Return a NotFound when data can't be located in your database

Modify the function in bscmake error bk1506 datei Index.cshtml page to handle this new 404 value, as shown in the code snippet below. Because you can't pass anything back from the method mag-200 error loading bootstrap your Web API, you need to add your own message on the page to specify exactly what could not be found. In this case, you inform the user that the product they requested could not be found.

Summary

In this article, mag-200 error loading bootstrap, you learned how to use the methods implemented in the .NET Controller class to return a specific HTTP status exception to the Web page that called the API. Using HTTP status codes allows you to add a case statement in your JavaScript to provide unique error messages to your user. I also recommend that, on the server-side, you log exceptions prior to returning an error to the front end.

You can download the sample mag-200 error loading bootstrap for this article by visiting my website at http://www.pdsa.com/downloads. Select PDSA Articles, then select “Code Magazine - CRUD in HTML - Handling Exceptions” from the drop-down list.

Remember when mag-200 error loading bootstrap disks stored a world of information? Remember when Visual FoxPro provided endless programming possibilities? Unfortunately, all good things come to an end, and Microsoft no longer supports Visual FoxPro. Don't let your application become obsolete. Let CODE's migration specialists bring life back to your Visual FoxPro program! To schedule your free consultation or to request our free PJX Analyzer tool, contact us at [email protected] or call 832-717-4445 ext. 013

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Google’s Core Web Vitals initiative has taken the SEO and Web Performance worlds by storm and many sites are busy optimizing their Page Experience to maximize the ranking factor. The Cumulative Layout Shift metric is causing trouble to a lot of sites, so let’s have a look at ways of addressing any issues for that metric.

Cumulative Layout Shift (CLS) attempts to measure those jarring movements of the page as new content — be it images, advertisements, or whatever — comes into play later than the rest of the page. It calculates a score based on how much of the page is unexpectedly moving about, and how often. These shifts of content are very annoying, mag-200 error loading bootstrap, making you lose your place in an article you’ve started reading or, worse still, making you click on the wrong button!

In this article, mag-200 error loading bootstrap, I’m going to discuss some front-end patterns to reduce CLS. I’m not going to talk too much about measuring CLS as I’ve covered that already in a previous article. Nor will I talk too much about the mechanics of how CLS is calculated: Google has some good documentation on that, and Jess Peck’s The Almost-Complete Guide to Cumulative Layout Shift is an awesome deep dive into that too. However, I will give a little background needed to understand some of the techniques.

Why CLS Is Different

CLS is, in my opinion, the most interesting of the Core Web Vitals, in part because it’s something we’ve never really measured or optimized for before. So, it often requires new techniques and error 1000 office 14 of thinking to attempt to optimize it. It’s a very different beast to the other two Core Web Vitals.

Looking briefly at the other two Core Web Vitals, Largest Contentful Paint (LCP) does exactly as its name suggests and is more of a twist on previous loading metrics that measures how quickly the page loads. Yes, we’ve changed how we defined the user experience of the page load to look at the loading speed of the most relevant content, mag-200 error loading bootstrap, but it’s basically reusing the old techniques of ensuring that the content loads as quickly as possible. How to optimize your LCP should be a relatively well-understood problem for most web pages.

First Input Delay (FID) measures any delays in interactions and seems not to be a problem for most sites. Optimizing that is usually a matter of cleaning up (or reducing!) your JavaScript and is usually site-specific, mag-200 error loading bootstrap. That’s not to say solving issues with these two metrics are easy, but they are reasonably well-understood problems.

One reason that CLS is different is that it is measured through the lifetime of the page — that’s the “cumulative” part of the name! The other two Core Web Vitals stop after the main component is found on the page after load (for LCP), or for the mag-200 error loading bootstrap interaction (for FID). This means that our traditional lab-based tools, like Lighthouse, often don’t fully reflect the CLS as they calculate only the initial load CLS. In real life, a user will scroll down the page and may get more content dropping in causing more shifts.

CLS is also a bit of an artificial number that is calculated based on how much of the page is moving about and how often. While LCP and FID are measured in milliseconds, CLS is a unitless number output by a complex calculation. We want the page to be 0.1 or under to pass this Core Web Vital. Anything above 0.25 is seen as “poor”.

Shifts caused by user interaction are not counted. This is defined as within 500ms of a specific set of user interactions though pointer events and scroll are excluded. It is presumed that a user clicking on a button might expect content to appear, for example by expanding a collapsed section.

CLS is about measuring unexpected shifts. Scrolling should not cause content to move around if a page is built optimally, and similarly hovering over a product image to get a zoomed-in version for example should also not cause the other content to jump about. But there are of course exceptions and those sites need to consider how to react to this.

CLS is also continually evolving with tweaks and bug fixes. It has just had a bigger change announced that should give some respite to long-lived pages, like Single Page Apps (SPA) and infinite scrolling pages, which many felt were unfairly penalized in CLS. Rather than accumulating shifts over the whole page time to calculate the CLS score like has been done up until now, the score will be calculated based on the largest set of shifts within a specific timeboxed window.

This means that if you have three chunks of CLS of 0.05, 0.06, and 0.04 then previously this would have been recorded as 0.15 (i.e. over the “good” limit of 0.1), mag-200 error loading bootstrap, whereas now will be scored as 0.06. It’s still cumulative in the sense that the score may be made up of separate shifts within that time frame (i.e. if that 0.06 CLS score was caused by three separate shifts of 0.02), but it’s just not cumulative over the total lifetime of the page anymore.

Saying that, if you solve the causes of that 0.06 shift, then your CLS will then be reported as the next largest one (0.05) so it still is looking at all the shifts over the lifetime of the page — it’s just choosing to report only the largest one as the CLS score.

With that brief introduction to some of the methodology about CLS, let’s move on to some of the solutions! All of these techniques basically involve setting aside the correct amount of space before additional content is loaded — whether that is media or JavaScript-injected content, but there’s a few different options available to web developers to do this.

Set Width And Heights On Images And iFrames

I’ve written about this before, but one of the easiest things you can do to reduce CLS is to ensure you have and attributes set on your images. Without them, an image will cause the subsequent content to shift to make way for it after it downloads:

An example layout with a title and two paragraphs, where the second paragraph has to shift down <a href=chto znachit phone code sig error? make space for an image.">

This is simply a matter of changing your image markup from:

To:

You can find the dimensions of the image by opening DevTools and hovering over (or tapping through) the element.

Chrome Dev Tools screenshot showing the image, rendered size, rendered aspect ratio, intrinsic size, <b>mag-200 error loading bootstrap</b>, intrinsic aspect ratio, file size and current source.

I advise using the Intrinsic Size (which is the actual size of the image source) and the browser will then scale these down to the rendered size when you use CSS to change these.

Quick Tip: If, like me, you can’t remember whether it’s width and height or height and width, think of it as X and Y coordinates so, like X, width is always given first.

If you have responsive images and use CSS to change the image dimensions (e.g. to constrain it to a of 100% of the screen size), mag-200 error loading bootstrap, then these attributes can be used to calculate the — providing you remember to override this to in your CSS:

All modern browsers support this now, though didn’t until recently as covered in my article. This also works for elements and images (set the and on the fallback element), though not yet for images of different aspect-ratios — it’s being worked on, and until then you should still set and as any values will be better than the by defaults!

This also works on native lazy-loaded images (though Safari doesn’t support native lazy loading by default yet).

The New CSS Property

The and technique above, to calculate the height for responsive images, can be generalized to other mag-200 error loading bootstrap using the new CSS property, which is now supported by Chromium-based browsers and Firefox, but is also in Safari Technology Preview so hopefully that means it will be coming to the stable version soon.

So you could use it on an embedded video for example in 16:9 ratio:

Interestingly, without defining the property, browsers will ignore the height for responsive video elements and use a default aspect-ratio of 2:1, so the above is needed to avoid a layout shift here.

In the future, it should even be possible to set the dynamically based on the element attributes by using but sadly this is not supported yet.

Or you can even use on a element for some sort of custom control you are creating to make it responsive:

For those browsers that don’t support you can use the older padding-bottom hack but, with the simplicity of the newer and wide support (especially once this moves from Safari Technical Preview to regular Safari), it is hard to justify that older method.

Chrome is the only browser that feeds back CLS to Google and it supports meaning that will solve your CLS issues in terms of Core Web Vitals. I don’t like prioritizing the metrics over the users, but the fact that the other Chromium and Firefox browsers have this and Safari will hopefully soon, and that this is a progressive enhancement means that I would say we’re at the point where we can leave the padding-bottom hack behind and write cleaner code.

Make Liberal Use Of

For those elements that don’t need a responsive size but a fixed height instead, consider usingmag-200 error loading bootstrap. This could be for a mag-200 error loading bootstrap height header, for example and we can have different headings for the different break-points using media queries as usual:

Of course the same applies to for horizontally placed elements, but it’s normally the height that causes the CLS issues.

A more advanced technique for injected content and advanced CSS selectors is to target when expected content has not been inserted yet. For example, if you had the following content:

And an extra is inserted via JavaScript:

Then you could use the following snippet to leave the space for additional content when the div is rendered initially.

This code will mag-200 error loading bootstrap create a shift to the element as the margin counts as part of that element so it will appear to shift when that is removed mag-200 error loading bootstrap though it doesn’t actually move on screen). However, at least the content beneath it will not be shifted so should reduce CLS.

Alternatively, you can use the pseudo-element to add the space to avoid the shift on the element as well:

But in all honesty, the better solution is to have the in the HTML and make use of on that.

Check Fallback Elements

I like to use progressive enhancement to provide a basic website, even without JavaScript where possible. Unfortunately, this caught me out recently on one site I maintain when the fallback non-JavaScript version was different than when the JavaScript kicked in.

The issue was due to the “Table of Contents” menu button in the header. Before the JavaScript kicks in this is a simple link, styled to look like the button that takes you to the Table of Contents page, mag-200 error loading bootstrap. Once JavaScript kicks in, it becomes a dynamic menu to allow you to navigate directly to whatever page you want to go to from that page.

Screenshots of two Table of Contents navigation components styled like a button. With JavaScript this opens a dynamic menu as shown in the second image.

I used semantic elements and mag-200 error loading bootstrap used an anchor element () for the fallback link but replaced that with a for the JavaScript-driven dynamic menu. These were styled to look the same, but the fallback link was a couple of pixels smaller than the button!

This was so small, and the JavaScript usually kicked in so quickly, that I had not noticed it was off. However, Mag-200 error loading bootstrap noticed it when calculating the CLS and, as this was in the header, it shifted the entire page down a couple of pixels. So this had quite an impact on the CLS score — enough to knock all our pages into the “Needs Improvement” category.

This was an error on my part, and the fix was simply to bring the two elements into sync (it could also have been remediated by setting a on the header as discussed above), but it confused me for a bit. I’m sure I’m not the only one to have made this error so be aware of how the page renders without JavaScript. Don’t think your users disable JavaScript? All your users are non-JS while they’re downloading your JS.

Web Fonts Cause Layout Shifts

Web fonts are mag-200 error loading bootstrap common cause of CLS due to the browser initially calculating the space needed based on the fallback font, and then recalculating it when the web font is downloaded. Usually, the CLS is small, providing a similarly sized fallback font is used, so often they don’t cause enough of a problem to fail Core Web Vitals, but they can be jarring for users nonetheless.

Two screenshots of <b>mag-200 error loading bootstrap</b> Smashing Magazine article with different fonts. The text is noticeably different sized and an extra sentence can fit in when the web fonts are used.

Unfortunately even preloading the webfonts won’t help here as, while that reduces the time the fallback fonts are used for (so is good for loading performance — LCP), it still takes time to fetch them, and so the fallbacks will still be used by the browser in most cases so doesn’t avoid CLS. Saying that, if you know a web font is needed on the next page (say you’re on a login page and know the next page uses a special font) then you can prefetch them.

To avoid font-induced layout shifts altogether, we could of course not use web fonts at all — including using system fonts instead, or using to not use them if not downloaded in time for the initial render. But neither of those are very satisfactory, to be honest.

Another option is to ensure the sections are appropriately sized (e.g. with ) so while the text in them may shift a bit, the content below it won’t be pushed down even when this happens. For example, setting a on the element could prevent the whole article from shifting down if slightly taller fonts load in — providing the different fonts don’t cause a fatal error w_loadwadfile couldnt load gfx.wad number of lines. This will reduce the impact of the shifts, however, for mag-200 error loading bootstrap use-cases (e.g. generic paragraphs) it will be difficult to generalize a minimum height.

What I’m most excited about to solve this issue, are the new CSS Font Descriptors which allow you to more easily adjust fallback fonts in CSS:

Prior to these, adjusting the fallback font required using the Font Loading API in JavaScript which was more complicated, but this option due out very soon may finally give us an easier solution that is more likely to gain traction. See my previous article on this subject for more details on this upcoming innovation and more resources on that.

Many client-side rendered pages, mag-200 error loading bootstrap, or Single Page Apps, render an initial basic page using just HTML and CSS, and then “hydrate” the template after the JavaScript downloads and executes.

It’s easy for these initial templates to get out of sync with the JavaScript version as new components and features are added to the app in the JavaScript but not added to the initial HTML template which is rendered first. This then causes CLS when these components are injected by JavaScript.

So review all your initial templates to ensure they are still good initial placeholders. And if the initial template consists of empty s, then use the techniques above to ensure they are sized appropriately to try to avoid any shifts.

Additionally, the initial which is injected with the app should have a to avoid it being rendered with 0 height initially before the initial template is even inserted.

As long as the is larger than most viewports, this should avoid any CLS for the website footer, for example. CLS is only measured when it’s in the viewport and so impacts the user. By default, an empty has a height of 0px, so give it a that is closer to what the actual height will be when the app loads.

Ensure User Interactions Complete Within 500ms

User interactions that cause content to shift are excluded from CLS scores. These are restricted to 500 ms after the interaction. So if you click on a button, and do some complex processing that takes over 500 ms and then render some new content, then your CLS score is going to suffer.

You can see if the shift was excluded in Chrome DevTools by using the Performance tab to record the page and then finding the shifts as shown in the next screenshot. Open DevTools go to the very intimidating (but very useful once you get a hang of it!) Performance tab and then click on the record button in the top left (circled on the image below) and interact with your page, and stop recording once complete.

Screenshot of Chrome Dev Tools with a shift selected and the Summary of this shows that it had recent input and so the <a href=canon error 2 255 0 is not included in the Cumulative Score.">

You will see a filmstrip of the page in which I loaded some of the mag-200 error loading bootstrap on another Smashing Magazine article so in the part I’ve paking.ru internal server error, you can just about make out the comments loading and the red footer being shifted down offscreen. Further down the Performance tab, under the Experience line, Chrome will put a reddish-pinkish box for each shift and when you click on that you will get more detail in the Summary tab below.

Here you can see that we got a massive 0.3359 score — well past the 0.1 threshold we’re aiming to be under, mag-200 error loading bootstrap, but the Cumulative score has not included this, because Had recent input is set to Uses.

Ensuring interactions only shift content within 500 ms mag-200 error loading bootstrap on what First Input Delay attempts to measure, but there are cases when the user may see that the input had an effect (e.g. a loading spinner is shown) so FID is good, but the content may not be added to the page until after the 500 ms limit, so CLS is bad.

Ideally, the whole interaction will be finished within 500ms, but you can do some things to set aside the necessary space using the techniques above while that processing is going on so that if it does take more than the magic 500 ms, then you’ve already handled the shift and so will not be penalized for it. This is especially useful when fetching content from the network which could be variable mag-200 error loading bootstrap outside your control.

Other items to watch out for are animations that take longer than 500ms and so can impact CLS. While this might seem a bit restrictive, the aim of CLS isn’t to limit the “fun”, but to set reasonable expectations of user experience and I don’t think it’s unrealistic to expect these to take 500ms or under. But if you disagree, or have a use case they might not have considered, then the Chrome team is open to feedback on this.

Synchronous JavaScript

The final technique I’m going to discuss is a little controversial as it goes against well-known web performance advice, but it can be the only method in certain situations. Basically, if you have content that you know is going to cause shifts, then one solution to avoid the shifts is to not render it until it’s settled down!

The below HTML will hide the initially, then load some render-blocking JavaScript to populate thethen unhide it. As the JavaScript is render-blocking nothing below this will be rendered (including the second block to unhide it) and so no shifts will be incurred.

It is important to inline the CSS in the HTML with this technique, so it is applied in order. The alternative is to unhide the content with JavaScript itself, but what I like about the above technique is that it still unhides the content even if the JavaScript fails or is turned off by the browser.

This technique can also even be applied with external JavaScript, but this will cause more delay than an inline as the external JavaScript is requested and downloaded. That delay can be minimized by preloading the JavaScript resource so it’s available quicker once the parser reaches that section of code:

Now, as I say, this I’m sure will make some web performance people cringe, as advice is to use or the newer (which are -ed by default) on JavaScript specifically to avoid blocking render, whereas we are doing the opposite here! However, if content cannot be predetermined and it is going to cause jarring shifts, then there is little point in rendering it early.

I used this technique for a cookie banner that loaded at the top of the page and shifted content downwards:

A screenshot of a web page, where the content is shifted down when a cookie banner is added to the top of the page.

This required reading a cookie to see whether to display the cookie banner or not and, while that could be completed server-side, this was a static site with no ability to dynamically alter the returned HTML.

Cookie banners can be implemented in different ways to avoid CLS. For example by having them at the bottom of the page, or overlaying them on top of the content, rather than shifting the content down. We preferred to keep the content at the top of the page, so had to use this technique to avoid the shifts. There are various other 503 html error and banners that site owners may prefer to be at the top of the page for various reasons.

I also used this technique on another page where JavaScript moves content around into “main” and “aside” columns (for reasons I won’t go into, it was not possible to construct this properly in HTML server-side). Again hiding the content, until the JavaScript had rearranged the content, and only then showing it, avoided the CLS issues that were dragging these pages’ CLS score down. And again the content is automatically unhidden even if the JavaScript doesn’t run for some reason and the unshifted content is shown.

Using this technique can impact other metrics (particularly LCP and also First Contentful Paint) as you are delaying rendering, and also potentially blocking browsers’ look ahead preloader, but it is another tool to consider for those cases where no other option exists.

Conclusion

Cumulative Layout Shift is caused by content changing dimensions, or new content being injected into the page by late running JavaScript. In this post, we’ve discussed various tips and tricks to avoid this. I’m glad the spotlight the Core Web Vitals have shone on this irritating issue — for too long we web developers (and I definitely include myself in this) have ignored this problem.

Cleaning up my own websites has led to a better experience for all visitors. I encourage you to look at your CLS issues too, and hopefully some of these tips will be useful mag-200 error loading bootstrap you do. Who knows, mag-200 error loading bootstrap, you may even manage to get down to the elusive 0 CLS score for all your pages!

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-webkit-overflow-scrolling

Non-standard: This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.

The CSS property controls whether or not touch devices use mag-200 error loading bootstrap scrolling for a given element.

Syntax

Values

Use "regular" scrolling, where the content immediately ceases to scroll when you remove your finger from the touchscreen.

Use momentum-based scrolling, where the content continues to scroll for a while after finishing the scroll gesture and removing your finger from the touchscreen, mag-200 error loading bootstrap. The speed and duration of the continued scrolling is proportional to how vigorous the scroll gesture was. Also creates a new stacking context.

Formal definition

Formal syntax

-webkit-overflow-scrolling = auto django contenttype nameerror name is not defined JavaScript Plugins

The components discussed in Chapter 3 are just the beginning. Bootstrap comes bundled with 13 jQuery plugins that extend the features and can add more interaction to your site. To get started with Bootstrap’s JavaScript plugins, you don’t need to be an advanced JavaScript developer. In fact, by utilizing Bootstrap Data API, most of the plugins can be triggered without writing a single line of code.

Bootstrap can be included on your site in two forms, either compiled or raw. In Bootstrap 2.2.2, the uncompressed file is 59KB and the minimized version is only 32KB. All of the Bootstrap plugins are accessible using the included Data API. With this, you don’t need to include a single line of JavaScript to invoke any of the plugin features.

Typically, JavaScript lies in a either a separate file or at the bottom of the page before the closing tag. You can either use the attribute to link to another file, or you can write the contents of the file between the opening and closing tags:

Generally, it is best to include all JavaScript calls into a check that ensures that the DOM has been loaded on the page. If you have the JavaScript trying to fire earlier, it may miss elements as the browser parses the page. With jQuery, adding a check is easily done by selecting the or the entire content of the page, and then applying the method:

As mentioned above, Bootstrap has a Data API where you can write data attributes into the HTML of the page. If you need to turn off the Data API, you can unbind the attributes by adding the following line of JavaScript:

If you need to disable a single plugin, you can do it programmatically using the namespace of the plugin along with the namespace:

The developers of Bootstrap believe that you should be able to use all of the plugins throughout the JavaScript API. All public APIs are single, chainable methods and return the collection acted upon.

All methods should accept an optional options object, a string which targets run-time error 429 activex particular method, or nothing (which initiates a plugin with default behavior).

The transition plugin provides simple transition effects. A few examples include:

  • Sliding or fading in modals
  • Fading out tabs
  • Fading out alerts
  • Mag-200 error loading bootstrap carousel panes

A modal is a child window that is layered over its parent window (see Figure 4-1). Typically, the purpose is to display content from a separate source that can have some interaction without leaving the parent window. Child windows can provide information, interaction, mag-200 error loading bootstrap, or more, mag-200 error loading bootstrap. I use them as a window for holding slideshows and login/registration information. The modal plugin is probably one of my favorite Bootstrap features.

To create a static modal window, use this code:

Modal headerOne fine body…CloseSave changes

Figure 4-1. Static 1603 error skype window

To invoke the loading ilpatch error window, you need to have some kind of a trigger. Normally I use a button or a link. If you look in the code below, you will see that in the tag, mag-200 error loading bootstrap, the is the target of the modal that you want to load on the page. This code allows you to create multiple modals on the page and then have different triggers for each of them. Now, to be clear, mag-200 error loading bootstrap don’t load multiple modals at the same time, but you can create many on the page to be loaded at different times.

There are three classes to take note of in the modal. The first iswhich is simply identifying the content of the as a modal. The second iswhich tells the browser to hide the content of the until we are ready to invoke it. And last, mag-200 error loading bootstrap, the class. When the modal is toggled, it will cause the content to fade in and out.

Launch demo modal×Modal headerOne fine body…CloseSave changes

Using the Mag-200 error loading bootstrap JavaScript Data API, you simply need to pass a few data attributes to toggle the slideshow. To start with, set on the link or button that you want to use to invoke the modal and then set the to the ID of the modal that you’d like to use.

To call a modal withuse a single line of JavaScript:

Options can either be passed in via data attributes or with JavaScript. To use the data attributes, prepend to the option name (e.g., ). See Table 4-1 for descriptions of some modal options.

Table 4-1. Modal options

Name Type Default Description

backdrop

Boolean

true

Set to false if you don’t want the modal to be closed when the user clicks outside of the modal.

keyboard

Boolean

true

Closes the modal when escape key is pressed; set to false to disable.

show

Boolean

true

Shows the modal when initialized.

remote

path

false

Using the jQuery method, inject content into the modal body. If an with a valid URL is added, it will load that content.

The following are some useful methods to use with modals.

Activates your content as a modal. Accepts an optional options object.

Manually toggles a modal.

Manually opens a modal.

Manually hides a modal.

Bootstrap provides the events listed in Table 4-2 if you need to hook into the function.

Table 4-2. Modal events

Event Description

show

Fired after the method is called.

shown

Fired when the modal has been made visible to the user.

hide

Fired when the instance method has been called.

hidden

Fired when the modal has finished being hidden from the user.

As an example, after the modal is hidden, you could cause an alert to fire:

The dropdown was covered extensively in Chapter 3, but the interaction was glossed over. As a refresher, dropdowns can be added to the navbar, pills, tabs, and buttons.

To use a dropdown (Figure 4-2), mag-200 error loading bootstrap, add to a link or button to toggle the dropdown.

Figure 4-2. Dropdown within navbar

Here’s the code for developing a dropdown with data attributes:

Word MAKE magazineWordPress DevelopmentSSpeaking EngagementsSocial Media

If you need to keep links intact (which is useful if the browser is not enabling JavaScript), use the attribute along with :

Dropdown .

Dropdown Usage coolpix lens error JavaScript

To call the dropdown toggle via JavaScript, use the following method:

The dropdown toggle has a simple method to show or hide the unable to open logs apache error. There are no options:

The Scrollspy plugin (Figure 4-3) allows you to target sections of the page based on scroll position. In its basic implementation, as you scroll, you can error establishing connection classes to the navbar based on the scroll position. To add the Scrollspy plugin via data attributes, mag-200 error loading bootstrap, add to the element you want to spy on (typically the body) and to the navbar that you want to apply the class changes to. For this to work, you must have elements in the body of the page that have matching IDs of the links that you are spying on.

Figure 4-3. Scrollspy example

For Scrollspy, you will need to add to the tag, along with that references the element that you are spying on:

.

In the navbar, you will need to have page anchors that will serve as indicators for the element to spy on:

Jake's BBQHomePorkBeefChicken

If you would rather invoke the scrollspy with JavaScript instead of using the data attributes, you can do so by selecting the element to spy on, and then invoking the function:

.scrollspy('refresh') Method

When calling the scrollspy via the JavaScript method, you need to call the method to update the DOM. This is helpful if any elements of the DOM have changed.

Options can be passed via data attributes or JavaScript. For data attributes, prepend the option name toas in (see Table 4-3).

Table 4-3. Scrollspy option

Name Type Default Description

offset

number

10

Pixels to offset from top of page when calculating position of scroll.

The offset option is handy when you are using a fixed navbar. You will want to offset the scroll by about 50 error 017 undefined symbol msg so that it reads at the correct time (see Table 4-4).

Table 4-4. Scrollspy event

Event Description

activate

This event fires whenever a new item becomes activated by the scrollspy.

Tabbable tabs were introduced in Chapter 3. By combining a few data attributes, you can easily create a tabbed interface (Figure 4-4). To do so, create the nav interface, and then wrap the content of the tabs inside a with a class of :

HomeProfileMessagesSettings.

Figure 4-4. Toggleable tabs

To enable the tabs, you can use the Bootstrap Data API or use JavaScript mag-200 error loading bootstrap. With the Data API, you need to add to the diablo 3 beta error 7. The anchor targets will activate the element that has the class and relative ID. Alternatively, may be used instead of to apply the same action. Here is one way to enable tabs:

Here’s an example of different ways to activate tabs:

Tabs panes have two different events that can be hooked into, as shown in Table 4-5.

Table 4-5. Toggleable tab events

Event Description

show

This event fires on tab show, but before the new tab has been shown. Use and to target the active tab and the previous active tab (if available), respectively.

shown

This event fires on tab show after a tab has been shown. Use and to target the active tab and the previous active tab (if available), respectively.

Here’s a code example of a shown method:

For information about the method, mag-200 error loading bootstrap, refer to the jQuery website.

Tooltips (Figure 4-5) are useful when you need the last terror acts in russia describe a link or (used in conjunction with the tag) provide the definition of an abbreviation. The plugin was originally based on the jQuery.tipsy plugin written by Jason Frame. Tooltips have since been updated to work without images, animate with a CSS animation, and work with the Bootstrap JavaScript API.

Figure 4-5. Tooltip placement

To add a tooltip, add to an anchor tag. The title of the anchor will be the text of a tooltip. The following two examples show how to do this in the Bootstrap Data API and JavaScript, respectively:

Like all of the plugins, there are options that can be added via the Bootstrap Data API or invoked via JavaScript. All options need to have prepended to them. So, the option would become (see Table 4-6).

Table 4-6. Tooltip options

Name Type mag-200 error loading bootstrap Default displaying bus initialization errors a CSS fade transition to the tooltip.

html

Boolean

false

Inserts HTML into the tooltip. If false, jQuery’s method will be used to insert content into the dom. Use text if you’re worried about XSS attacks.

placement

string/function

‘top’

Specifies how to position the tooltip (i.e., mag-200 error loading bootstrap, top, bottom, left, mag-200 error loading bootstrap, or right).

selector

string

false

If a selector is provided, tooltip objects will be delegated to the specified targets.

title

string/function

''

The title option is the default title value if the attribute isn’t present.

trigger

string

‘hover’

Defines how the tooltip is triggered: click, hover, focus, or manually.

delay

number/object

0

Delays showing and hiding the tooltip in ms—does not apply to manual trigger type. If a number is supplied, delay is applied to both hide/show, mag-200 error loading bootstrap. Object structure is:

Here are some useful methods for tooltips.

Attaches a tooltip handler mag-200 error loading bootstrap an element collection:

Reveals an element’s tooltip:

Hides an element’s tooltip:

Toggles an element’s tooltip:

Hides and destroys an element’s tooltip:

The popover (see Figure 4-6) is a sibling of the tooltip, offering an extended view complete with a heading. For the popover to activate, a user just needs to hover the cursor over the element, mag-200 error loading bootstrap. The content of the popover can be populated entirely using the Bootstrap Data API. This method requires a tooltip.

Figure 4-6. Popover placement

Use the following code for popover placement:

Click Me!

To enable the popover with JavaScript, use the function, passing in any options that you might need:

All options can be passed via the Bootstrap Data API, or directly with JavaScript (see Table 4-7).

Table 4-7. Popover options

Name Type DefaultDescription

animation

Boolean

true

Applies a CSS fade transition to the tooltip.

html

Boolean

false

Inserts HTML into the popover. If false, jQuery’s method will be used to insert content into the dom. Use text if you’re worried about XSS attacks.

placement

string

function

right

Specifies how to position the popover (i.e., top, bottom, left, right)

selector

string

false

If a selector is provided, tooltip objects will be delegated to the specified targets.

trigger

string

click

How the popover is triggered (i.e., click, hover, focus, manual)

title

string

function

''

Default title value if title attribute isn’t present

content

string

function

''

Default content value if data-content attribute isn’t present

delay

number

object

0

Delays showing and hiding the popover in ms—does not apply to manual trigger type. If a number is supplied, delay is applied to both hide/show. Object structure is: .

Here mag-200 error loading bootstrap some useful methods for popovers.

Initializes popovers for an element collection:

Reveals an element’s popover:

Hides an element’s popover:

Toggles an element’s popover:

Hides and destroys an element’s popover:

With the Data API, it is easy to add dismiss functionality to alert messages (Figure 4-7).

Figure 4-7. Error alert message

You can close an alert manually with the JavaScript method or use data attributes in conjunction with an anchor or button.

Here is how to dismiss via JavaScript:

Here is how to dismiss via Data API:

To enable all alerts to be closed, mag-200 error loading bootstrap, add the following method. To enable alerts to animate out when closed, make sure they have the and class already applied to them.

There are two events that can be tied to Bootstrap’s class as shown in Mag-200 error loading bootstrap class events

Event Description

close

This event fires immediately when the close instance method is called.

closed

This event is fired when the alert has been closed (will wait for CSS transitions to complete).

As an example, if you wanted to trigger a function after an alert has closed, you could use this function:

Buttons were introduced in Chapter 3. With Bootstrap, you don’t need to do anything to make them work as links or as buttons in forms. With this plugin you can add in some interaction, such as loading states or button groups with toolbar-like functionality.

To add a loading state to a button (shown in Figure 4-8), simply add as an attribute to the button:

Submit!

When the button is clicked, the class is added, giving the appearance that it can no longer be clicked.

Figure 4-8. Loading button

When clicking on a button with the attribute (Figure 4-9), a class of is added:

Toggle

Figure 4-9. Toggle button

Buttons can work like checkboxes (as in Figure 4-10), allowing a user to select many of the options in a button group. To add this function, add for checkbox style toggling on :

LeftMiddleRight

Figure 4-10. Checkbox buttons

Radio buttons (Figure 4-11) function similarily to checkboxes. The primary difference is that a radio button doesn’t allow for multiple selections—only one button in the group can be selected. To add radio-style toggling onadd :

LeftMiddleRight

Figure 4-11. Radio buttons

The method can be applied to any class or ID. To enable all buttons in the via JavaScript, add the following code:

The mag-200 error loading bootstrap methods are useful to use with buttons.

Toggles push state. Gives the button the appearance that it has been activated:

When loading, the button is disabled and the text is changed to the option from the attribute:

.

Resets button state, bringing the original content back to the text. This method is useful when you need to return the button back to the primary state:

String in this method is referring to any string declared by the user:

To reset the button state and bring in new content, use the string method:

.

The collapse plugin makes it easy to make collapsing divisions of the page (see Figure 4-12). Whether you use it to build accordion navigation or content boxes, mag-200 error loading bootstrap, it allows for a lot of content options.

Figure 4-12. Accordion

The following code creates collapsible groups:

Collapsible Group Item #1 Anim pariatur cliche. Collapsible Group Item #2 Anim pariatur cliche. .

You can also use the data attributes to make all content collapsible:

simple collapsible …

Like all of the plugins that use the Data API, you can add all needed markup without writing any JavaScript. Add and a to the element to automatically assign control of a collapsible element. The attribute will accept a CSS selector to apply the collapse to. Be sure to add the class to the collapsible element. If you’d like it to default open, include the additional class .

To add accordion-like group management to a collapsible control, add the data thinkpad t410 fan error .

The collapse method can activated with JavaScript as well:

The options listed runtime error 326 Table 4-9 can be passed via data attributes or with JavaScript.

Table 4-9. Collapse options

Name Type Default Description

parent

selector

false

If selector, then all collapsible elements under the specified parent will be closed when this collapsible item is shown. (Similar to traditional accordion behavior.)

toggle

Boolean

true

Toggles the collapsible element on invocation.

The following methods are useful to use with collapsible elements.

Activates your content as a collapsible element. Accepts an optional options object:

Toggles a collapsible element to shown or hidden:

Shows a collapsible element:

Hides a collapsible element:

There are four events that can be hooked into with the collapse plugin, described in Table 4-10.

Table 4-10. Collapse events

Event Description

show

This event fires immediately when the instance method is called.

shown

This event is fired when loaddrv.exe - start haspflt error 2 collapse element has been made visible to the user (will wait for CSS transitions to complete).

hide

This event is fired immediately when the method has been called.

hidden

This event is fired when mag-200 error loading bootstrap collapse element has been hidden from the user (will wait for CSS transitions to complete).

After a has been collapsed, you could use the following code to execute a function:

The Bootstrap carousel (Figure 4-13) is a flexible, responsive way to add a slider to your site. In addition to being responsive, the content is flexible enough to allow images, mag-200 error loading bootstrap, iframes, videos, or just about any type of content that you might want.

Figure 4-13. Carousel

The following code creates the Bootstrap carousel:

………

To implement the carousel, you just need to add the code with the markup above. There is no need for data attributes, just simple class-based development. You can manually call the carousel with JavaScript, using the mag-200 error loading bootstrap code:

Options can be passed through data attributes or through JavaScript. The options are listed in Table 4-11.

Table 4-11. Carousel options

Name Type Default Description

interval

number

5000

The amount of time to delay between automatically cycling an item. If false, carousel will not automatically cycle.

pause

string

“hover”

Pauses the cycling of the carousel on mouseenter and resumes the cycling of the carousel on mouseleave.

The following methods are useful carousel code.

Initializes the carousel with an optional object and starts cycling through items:

Cycles through the carousel items from left to right:

Stops the carousel from cycling through items:

Cycles the carousel to a particular frame (0-based, similar to an array):

Cycles to the previous item:

Cycles to the next item:

The carousel has two events that can be hooked into, described in Table 4-12:

Table 4-12. Carousel events

Event Description

slide

This event fires immediately when the brochure printing typographical errors instance method is invoked.

slid

This event is fired when the carousel has completed its slide transition.

Typeahead allows you to easily create typeahead inputs in forms (Figure 4-14). For example, you could preload states in a state field or, with some JavaScript, get search results using some AJAX calls.

Figure 4-14. Typeahead

Using Data API, you can add sources via the attribute. Items should be listed in either a JSON array or a function:

To call directly with JavaScript, use the following method:

Table 4-13 shows a list of options.

Table 4-13. Carousel options

Name Type Default Description

source

array, function

[ ]

The data source to query against. May be an array of strings or a function. The function is passed through two arguments: the value in the input field and the callback, mag-200 error loading bootstrap. The function may be used synchronously by returning the data source directly or asynchronously via the callback’s single argument.

items

number

8

The maximum number of items to display in the dropdown.

minLength

number

1

The minimum character length needed before triggering autocomplete suggestions.

matcher

function

case insensitive

The method used to determine if a query matches an item. Accepts a single argument, the item against which to test the query. Accesses the current query with. Return a Boolean true if query is a match.

sorter

function

exact match, case sensitive, case insensitive

Method used to sort autocomplete results. Accepts a single argument item and has the scope of the typeahead instance. Reference the current query with .

updater

function

returns selected item

The method used to return the selected item. Accepts a single argument item and has the scope of the typeahead instance.

highlighter

function

highlights all default matches

Method used to highlight autocomplete results. Accepts a single argument item and has the scope of the typeahead instance. Should return HTML.

The affix plugin allows a to become affixed to a location on the page. A common example of this is social icons. They will start in a location, but as the page hits a certain mark, the will become locked in place and will stop scrolling with the rest of the page.

To apply the affix plugin to ayou can use either data attributes, or you can use JavaScript directly. Note that you must position the element so that it can be affixed to the page. Position is controlled by the attribute, using either , or. You then use the to calculate the position of the scroll.

.
Name Type mag-200 error loading bootstrap Default Description

offset

number/function/object

10

Pixels to offset from screen when calculating position of scroll. If a single cpu ucode loading error asus is provided, the offset will be applied in both top and left directions. To listen for a single direction or multiple unique offsets, just provide an object. Use a function when you need to dynamically provide an offset (useful for some responsive designs).

Images are critical for every website and application today. Whether it be marketing banners, product images or logos, it is impossible to imagine a website without images. Sadly though, images are large in size making them the single largest contributor to the page size.

As per the latest HTTP Archive data, the median page size on desktops is 1511 KB. Images make up for almost 650 KB of that size, roughly 45% of the total page size. Now, since we cannot do away with images, we need to make our web pages load fast with them.

In this guide, we will talk about lazy loading images, a technique that helps improve the page load time and reduces page size, while still retaining all the images on the page.

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Table of contents

What is Image Lazy Loading?

Lazy Loading Images is a set of techniques in web and application development that defer the loading of images on a page to a later point in time - when those images are actually needed, instead of loading them up front. These techniques help in improving performance, better utilization of the device’s resources, and reducing associated costs.

Here is a quick video to help you understand better:

The word “lazy” in the English language is often attributed to the act of avoiding work as long as possible.

Similarly, mag-200 error loading bootstrap, lazy loading defers the loading of resources on the page till they are mag-200 error loading bootstrap needed. Instead of loading mag-200 error loading bootstrap resources as soon as the page loads, which is what normally happens, the loading of these resources is put off till the moment the user actually needs to view them.

The technique of lazy loading can be applied to almost all the resources on a page. For example, in a single page application, if a JS file is not needed until later, it is best not to load it initially. If an image is not needed up front, load mag-200 error loading bootstrap later when it actually needs to be viewed.

Why go for lazy loading images at all?

Lazy Loading defers the loading of an image that is not needed on the page immediately. An image, not visible to the user when the page loads, is loaded later when the user scrolls and the image actually becomes visible. If the user never scrolls, an image that is not visible to mag-200 error loading bootstrap user never gets loaded.

It carries two main advantages.

1. Performance Improvement

This is the most important one for you as a website administrator - better performance and load time.

With lazy loading, you are reducing the number of images mag-200 error loading bootstrap need to be loaded on the page initially. Lesser resource requests mean lesser bytes to download and lesser competition for the limited network bandwidth available to the user. This ensures that the device is able to download and process the remaining resources much faster. Hence, the page becomes usable much sooner as compared to one without lazy loading.

2. Cost reduction

The second benefit for you is in terms of delivery costs. Image delivery, or delivery of any other asset, is usually charged on the basis of the number of bytes transferred.

As mentioned earlier, with lazy mag-200 error loading bootstrap, if the image is not visible, it never gets loaded. Thus, you reduce the total bytes delivered on the page., especially for users that bounce off the page or interact with only the top portion of the page. This reduction in bytes transferred from your delivery network reduces delivery costs. This will become more apparent as we explore lazy loading further.

Which Images can be Lazy Loaded?

The basic idea of lazy loading is simple - defer loading anything that is not needed right now. For images it usually translates to any image parse error, unexpected $end in is not visible to the user up front can be lazy loaded.

As the user scrolls down the page, the image placeholders start coming into viewport (visible part of the webpage). We trigger the load for these images when they become visible.

You can find out which images are a candidate for lazy loading and how many bytes you can save on the initial page load by using Google Lighthouse audit tool. The audit performed by this tool has a section dedicated for offscreen images. You can also use ImageKit’s website analyzer to identify if your website uses lazy loading or not, in addition other critical image-related optimizations on your page.

Lazy loading is critical not only for good performance, but also to deliver a good user experience.

Lazy Loading Techniques for images

Images on a webpage can be loaded in two ways - using the <img> tag, or using the CSS `background` property. Let's first look at the more common of the two, the <img> tag, and then move on to CSS background images.

The general concept of lazy loading images in <img> tag

Lazy loading images can be broken down into two steps:

Step one is to prevent the image load up front. For images loaded using the tag, the browser uses the attribute of the tag to trigger the image load, mag-200 error loading bootstrap. Irrespective of whether it is the 1st or the mag-200 error loading bootstrap image in your HTML and well off-screen, if the browser gets the attribute, mag-200 error loading bootstrap, it would trigger the image load.

Thus, mag-200 error loading bootstrap, to lazyload such images, put the image URL in an mag-200 error loading bootstrap other than. Let’s say we specify the image URL in the attribute of the image tag. Now that is empty, the browser doesn’t trigger the image load

Now that we've stopped the upfront load, we need to tell the browser when to load the image.

For this, we check that as soon as the image (i.e., its placeholder) enters the viewport, we trigger the load.

To check when an image enters the viewport, there are two ways:

Trigger image load using Javascript events

In this technique, we use event listeners on the and events in the browser. The scroll event is an obvious one to check when the user scrolls the page. The resize and orientationChange events are equally important for lazy loading. The resize event occurs when the size of the browser window changes. The orientationChange event gets triggered when the device is rotated from landscape to portrait mode, or vice versa. In such cases, the number of images that become visible on the screen will change. Therefore, we'll need to trigger a load for these images.

When either of these events occur, we find all the images on the page that are to be lazy loaded and haven't been loaded error can not start ldap. From these images, we check which ones are now in the viewport. This is done using error code 0x80070570 image’s top offset, the current document scroll top, and window height. If it has entered the viewport, we pick the URL from attribute and put it in the attribute. This triggers the image load. We also remove the class that identifies the images to be lazily loaded for events that trigger later. Once all the images are loaded, we remove the event listeners.

When we scroll, the scroll event triggers multiple times rapidly. Thus, for performance, we add a small timeout that throttles the delphi cnpack error reading symbol file loading function execution.

Here is a working example of this approach.

If you notice, the first 3 images in the example are loaded up front. The URL is present directly in the attribute instead of the attribute. This is essential for a good user experience. Since these images are at relocation error undefined symbol top of the page, they should be made visible as soon as possible. We must not wait for an event or JS execution to load them.

Using Intersection Observer API to trigger image loads

Intersection Observer API is a relatively new API in browsers. It makes it really simple to detect when an element enters the viewport, and take an action when it does. In the previous method, we had to bind events, keep performance in mind, and implement a way to calculate if the element was in the viewport or not. The Intersection Observer API makes this really simple, helps avoid the math, and delivers great performance.

An example acer a500 wifi error using the Intersection Observer API to lazy load images:

We attach the observer on all the images to be lazy loaded. Once the API detects that the element has entered the viewport, using the property, we pick the URL from the attribute and move it to the attribute for the browser to trigger the image load. Once anti terror weapons ru is done, we remove the lazy class from the image, and also remove the observer from that image.

If you compare the time taken to load an image in both the methods, mag-200 error loading bootstrap, event listeners vs Intersection Observer, you would find that using the Intersection Observer API, the image load mag-200 error loading bootstrap triggered much quicker, and yet the site doesn’t appear sluggish on scrolling. In the method involving event listeners, we had to add a timeout to make it performant, which has a marginal impact on the user experience as the image load is triggered with a slight delay.

However, the support for Intersection Observer API is not available across all browsers. Hence, we need to fall back to the event listener method in browsers where the Intersection Observer API is not supported. We have taken this into account in the example above.

Native Lazy Loading

In their most recent mag-200 error loading bootstrap, Google has added support for native lazy loading in the Chrome browser's latest version - Chrome 76, mag-200 error loading bootstrap. All Chromium-based browsers, i.e., Chrome, Edge, and Safari, and Firefox. You can find more details about browser support for native lazy loading on caniuse.com.

With browser-side support coming into play, now, mag-200 error loading bootstrap, developers only need to add a "loading" attribute when embedding images, to implement lazy loading on their websites.

In fact, one does not need to even be a developer to get this done. Some basic knowledge of HTML is parse error syntax error, unexpected t_variable in to implement the "loading" attribute, making this feature accessible to many more website admins.

So the code would now look like -

The following values are supported by the loading attribute:

  • lazy - Deferring the loading of assets till it reaches a certain distance from the viewport.
  • eager - loading the assets as soon as the page loads, irrespective of where they are placed on the page, whether above or below the page fold.
  • auto- This value triggers default lazy loading. Basically, it's the same as not including the loading attribute.

However, for browsers that do not support native lazy loading, the aforementioned techniques for implementing of it need to be applied.

As covered later in this blog, to prevent the surrounding content from reflowing when a lazy-loaded image is downloaded, make sure to add and attributes to the element or specify their values directly in an inline style:

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Lazy Loading CSS Background Images

After tags, background images are the most common way to load images on a webpage. For tags, the browser has a very simple approach - if the image URL is available, let’s load the image.

With CSS background images it is not that straightforward. To load CSS background images, the browser needs to build the DOM (Document Object Model) tree, as well as the CSSOM (CSS Object Model) tree, to decide if the CSS style applies to a DOM node in the current document.

If the CSS rule specifying the background image does not apply to an element in the document, then the browser does not load the background image. If the CSS rule is applicable to an element in the current document, then the browser loads the image.

This may seem complex at first, but this same behavior forms the basis of the technique for lazy loading background images, mag-200 error loading bootstrap. In simple terms, we trick the browser into not applying the background image CSS property to an element till that element comes into the viewport.

Here is a working example that lazy loads a CSS background image.

One thing to note here is that the Javascript code for lazy loading is still the same. We are using the Intersection Observer API method with a fallback to the event listeners. The trick lies in the CSS.

The element with ID bg-image has a specified in the CSS. However, when the class is added to this element, in the CSS we override the property and set it to none.

Since the rule, mag-200 error loading bootstrap, combining with class has a higher preference in CSS than justthe browser applies the property to the element initially. When we scroll down, the Intersection Observer (or event listeners) detects that the image is in the viewport and removes the class. This changes the applicable CSS and applies the actual property to the element triggering the load of the background image.

Better user experience with lazy loading images

Lazy loading presents a great performance benefit. For an e-commerce company that loads hundreds of product images on a page, lazy loading can provide a significant improvement in initial page load time while decreasing the bandwidth consumption.

However, a lot of companies do not opt for lazy loading because they believe it goes against delivering a great user experience quoting reasons like "the initial placeholder is ugly", "the load times are slow", etc.

How can we solve such concerns around user experience with lazy loading of images?

1. Using the right image placeholders

A placeholder is what appears in the container until the actual image is loaded. Normally, we see developers using a solid color placeholder for images, or a single image as a placeholder for all images.

We used the same in our example code as well. A solid light grey color is used for all our image backgrounds. However, we can do better to provide a more pleasing user experience.

A look at some examples of better placeholders for our images:

a) Dominant color placeholder

Instead of using a fixed color for the image placeholder, we find the dominant color from the original image and use that as a placeholder.

This technique has been used for quite some time in Google image search mag-200 error loading bootstrap and Pinterest.

Sample image picked from Manu.ninja

Pinterest using dominant color placeholders

This might look complex to achieve, but a very simple way of accomplishing this is to first scale down the image to a 1x1 pixel and then scale it up to the size of the placeholder - a very rough approximation, but a simple, no-fuss way to get a single dominant color.

Using ImageKit, the dominant color placeholder can be obtained using a chained transform in ImageKit as shown here:

Dominant color placeholder image URL example using ImageKit

The placeholder image is just 661 bytes in size, as compared to the original image which is 12700 bytes, making it 19x smaller. And it provides a more pleasant transition experience from placeholder to the actual image.

Here's a video demonstrating how this effect works for the user:

You can view the working example and code for using dominant color placeholder here.

b) Low quality image placeholder (LQIP)

We can expand the above idea of using a dominant color placeholder further.

Instead of using a single color, we use a very low-quality, blurred version of the original image as the placeholder. Not only does it look better, it also gives the user some idea about what to expect in the actual image, while giving the perception that the image load is in progress. This is great for improving the perceived loading experience.

This technique has been utilized by the likes of Facebook and Medium.com for images on their websites and apps.

LQIP image URL example using ImageKit

The LQIP is 1300 bytes in size, almost 10x smaller than the original image, and a significant improvement in terms of visual experience over any other placeholder technique.

Here's a video demonstrating how this effect works for the user:

You can view the working example and code for using LQIP technique mag-200 error loading bootstrap is evident from the video samples of the two techniques above, that using dominant-color placeholders or using low-quality image placeholders provides a smoother transition from the placeholder to the actual image, while giving the user an idea of what's to come and improves loading perception.

2. Adding some buffer time for image load

When we discussed different methods to trigger image load above, we checked for the point of time where the image enters the viewport, i.e. when the top edge of the image placeholder coincides with the bottom edge of the viewport.

The problem
Often, users scroll swiftly through the page, and the image needs some time to load and appear on the screen. In this scenario, combined with the fact that the load image event might be triggered with a delay because of throttling, you would often face the scenario where the placeholders come into the viewport, the user waits for a few milliseconds while the image loads up. This delay makes for a poor user experience.

While using Intersection Observers to load the image or using low-quality image placeholders provides better loading performance and user experience, there is another simple trick that you can use to ensure that the images are always loaded completely when they enter the viewport - introduce a margin to the trigger point for images.

The solution
Instead of loading the image just when they exactly enter the viewport, load the images when they are, let’s say, 500px away from entering the viewport. This provides additional time, between the load trigger and the actual entry in the viewport, for the images to load.

With the Intersection Observer API, you can use the `root` parameter along with the `rootMargin` parameter (works as standard CSS margin rule), to increase the effective bounding box that is considered to find the “intersection”.

With the event listener method, instead of checking for the difference between the image edge and the viewport edge to be 0, we can use a positive number to add some threshold.

The example here uses a 500px threshold to load images.

As evident from the video below (monitor the network requests closely appearing at the bottom), while scrolling, when the third image is in view, mag-200 error loading bootstrap, the 5th image gets loaded. When the 4th image comes into the view, the 6th image gets loaded. This way we are giving sufficient time for the images to load completely and in most cases, the user won’t see the placeholder at all.

In case you haven't noticed yet, in all our examples, the third image (image3.jpg) is always loaded up front, even though it's outside the viewport, mag-200 error loading bootstrap. This was also done following the same principal - load slightly in advance instead of loading exactly at the threshold for better user experience.

If you are using the native image lazy loading method, browsers automatically calculate this distance from the viewport threshold to determine when the browser should trigger the image load, mag-200 error loading bootstrap. Browsers consider the image type, network speed, and data-saver setting in the browser to decide this threshold, keeping in mind developer expectations and user experience.

3. Avoiding content shifting with lazy loading

This is another trivial point which, if solved, can help maintain a good user experience.

The problem
When netlib_recv failed, error=10058 is no image, the browser doesn’t know the dimensions of the content that is to be displayed in the enclosing container. And if we do not specify it using CSS, the mag-200 error loading bootstrap container would have no dimensions, i.e. 0 x 0 pixels. So, when the image gets loaded, the browser would resize the enclosing container to fit the image.
This sudden change in the layout causes other elements to move around and it is called content shifting. As demonstrated in this content shifting article & video from Smashing Magazine, it's a rather unpleasant experience for a user as the content moves suddenly when the image loads.

The solution
This can be avoided by specifying a height and/or width for your enclosing container so that the browser can paint the image container with a known height and width. Later, when the image loads, since the container size is already specified and the image fits into that perfectly, the rest of the content around the container stays put.

4. Do not lazy load all the images

This is another microsoft essential security error 80070002 the developers often commit - lazy load all the images on the page. This might reduce the initial page load, but would also result in bad user experience as a lot of images, even the ones at the top of the webpage, won’t show up till the Javascript gets executed.

Here are some general principles to follow to identify which images should be lazy loaded.

a) Any image that is present in the viewport, or at the beginning of the webpage, mag-200 error loading bootstrap, should not be lazy loaded. This applies to any header image, marketing banner, logos, etc., as the user should see them as soon as the page loads.

Also, as mobile and desktop devices have different screen sizes, they will have a different number of images that will be visible on the screen initially, mag-200 error loading bootstrap. So you need to take into account the device type to decide which resources to load up front and which to lazy load.

b) Any image that is just slightly off the viewport should not be lazy loaded. This is based on the point discussed earlier - load slightly in advance. So, let’s say, any image that is 500px or a single scroll from the bottom of the viewport can be loaded up front as well.

c) If the page isn’t too long, mag-200 error loading bootstrap, may be just a single scroll or two, or if there are less than 5 images outside the viewport, then lazy loading can be avoided altogether.

It would not provide any significant benefit to the end user in terms of performance. The additional JS that you load on the page to enable lazy loading will offset any benefit reaped from lazy loading such a small number of images.

Javascript dependency of Lazy Loading

The entire idea of lazy loading is dependent on the availability of Javascript execution capabilities in the user’s browser. Though native lazy loading promises to remove this dependency, with browser support still close to 70%, if you are to win32 error. code 740 the same experience across all browsers, you would still need to utilize JS libraries.

While most of your users would have Javascript execution enabled in their browser, as it is essential for almost all websites these days, you may want to plan for users that do not allow javascript execution or use a browser that doesn’t support javascript at all.

You could either show them a message telling them why the images won’t g_vfs_done read error = 5 and that they need to switch to a modern browser or enable Javascript. Or you can use the noscript tag to create a usable experience for these users as well. Using the <noscript> tag approach for such users has some gotchas.

This thread on Stack Overflow does a great job addressing these concerns, and is a recommended read for anyone looking to address this set of users.

Popular Javascript libraries for lazy loading on your website

Since browser environments and implementation details can vary across browsers and devices, it is best to use a tried and tested library for lazy loading.

Here is a list of popular libraries and platform specific plugins that will allow you to implement lazy loading with minimal effort

yall.js (Yet Another Lazy Loader)

  • Uses Intersection Observer and falls back to event-based lazy loading.
  • Supports all major HTML element types but not background-images.
  • Works on IE11+ as well.

lazysizes

  • Very popular and extensive functionality.
  • Supports responsive images srcset and sizes attribute as well.
  • High performance even without Intersection Observer.

jQuery Lazy

  • A simple, jquery based lazy loading library.

WeltPixel Lazy Loading Enhanced

  • A Magento 2 extension for lazy loading images.

Magento Lazy Image Loader

  • A Magento 1.x extension for lazy loading images.

Shopify Lazy Image Plugin

Wordpress A3 Lazy Load

  • Image lazy loading plugin for Wordpress.

How to test if lazy loading is working?

Once you have implemented lazy loading, you'll want to check if the behaviour of images on your website is as intended, mag-200 error loading bootstrap. The simplest way is to open developer tools in Chrome browser.

Go to Network Tab > Images.

Here, when you refresh the page for the first time, only the images that are to be loaded up front should get loaded. Then, as you start scrolling down the page, other image load requests would get triggered and loaded.

You can also notice the timings for image load in the waterfall column in this view. It would help you identify image loading issues, if any, or issues in triggering the image load.

Another way would be to run the Google Chrome Lighthouse audit report on your page after you have implemented the changes, and look for suggestions under the “Offscreen images” section.

Conclusion

We have covered almost everything related to lazy loading images in this guide. Lazy loading, if implemented correctly, will significantly improve the loading performance of your web pages, reduce page size and delivery costs by cutting down on unnecessary resources loaded up front, while keeping the necessary content intact on the page. With faster loading pages comes a great user experience, something your visitors would love.

So, what are you waiting for? Get started with lazy loading images now!

Are you optimizing your website images? No? Get started mag-200 error loading bootstrap ImageKit's image  CDN & optimization tool for free now!

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