Title: Native Lazyload
Author: Felix Arntz
Published: <strong>5. 9. 2019</strong>
Last modified: 6. 12. 2019

---

Prohledat pluginy

![](https://ps.w.org/native-lazyload/assets/banner-772x250.png?rev=2151732)

Plugin **nebyl testován na 3 nejnovějších verzích WordPressu.** Nemusí už být tedy
podporován a u novějších verzí WordPressu může mít problémy s kompatibilitou a může
být nestabilní.

![](https://ps.w.org/native-lazyload/assets/icon-256x256.png?rev=2151732)

# Native Lazyload

 Autor: [Felix Arntz](https://profiles.wordpress.org/flixos90/)

[Stáhnout](https://downloads.wordpress.org/plugin/native-lazyload.1.0.2.zip)

 * [Podrobnosti](https://cs.wordpress.org/plugins/native-lazyload/#description)
 * [Hodnocení](https://cs.wordpress.org/plugins/native-lazyload/#reviews)
 *  [Instalace](https://cs.wordpress.org/plugins/native-lazyload/#installation)
 * [Vývojáři](https://cs.wordpress.org/plugins/native-lazyload/#developers)

 [Podpora](https://wordpress.org/support/plugin/native-lazyload/)

## Popis

Lazy-loads media using the native browser feature. [Learn more about the new `loading` attribute](https://web.dev/native-lazy-loading)
or [view the WordPress core ticket](https://core.trac.wordpress.org/ticket/44427)
where inclusion of a similar implementation in WordPress core itself is being discussed.

If the `loading` attribute is not supported by the browser, the plugin falls back
to a JavaScript solution based on `IntersectionObserver`. For the case that JavaScript
is disabled, but the `loading` attribute _is_ supported by the browser, a `noscript`
variant of the respective element will be added that also includes the `loading`
attribute without any further changes.

#### „Native“ means „Fast“

If you have found your way over here, you are probably aware of how crucial performance
is for a website’s user experience and success. You might also know that lazy-loading
is a key feature to improve said performance. However, the solutions for lazy-loading
so far still added a bit of overhead themselves, since they relied on loading, parsing
and running custom JavaScript logic, that may be more or less heavy on performance.

This plugin largely does away with this pattern. It relies on the new [`loading`](https://github.com/whatwg/html/pull/3752)
attribute, which makes lazy-loading a native browser functionality. The attribute
is already supported by Chrome, and will be rolled out to other browsers over time.
The solution being „native“ means that it does not rely on custom JavaScript logic,
and thus is more lightweight. And „more lightweight“ means „faster“.

Last but not least, a neat thing to keep in mind is that this plugin will essentially
improve itself over time, as more browsers roll out support for the `loading` attribute.

#### Usage

Just activate the plugin, and all your images and iframes in post content will be
loaded lazily.

### Credit

This plugin is partly based on logic from [WP Rig](https://github.com/wprig/wprig/blob/v2.0/inc/Lazyload/Component.php)
as well as recommendations from [web.dev](https://web.dev/native-lazy-loading) and
[developers.google.com](https://developers.google.com/web/fundamentals/performance/lazy-loading-guidance/images-and-video/).

## Instalace

 1. Upload the entire `native-lazyload` folder to the `/wp-content/plugins/` directory
    or download it through the WordPress backend.
 2. Activate the plugin through the ‚Plugins‘ menu in WordPress.

## Nejčastější dotazy

  Where are the plugin’s settings?

This plugin does not have a settings screen. Just by activating it, the plugin will
work.

  How can I prevent an image or iframe from being loaded lazily?

You can add a class `skip-lazy` to indicate to the plugin you would like to skip
lazy-loading for this image or iframe.

  This plugin still loads an extra JavaScript file! I don’t want that.

This is perfectly fair. Note that the plugin only loads the JavaScript file as a
fallback for when the user’s browser does not support the native `loading` attribute
yet. The file includes logic to still autoload the image in a non-native way. If
you prefer to purely rely on the `loading` attribute and not provide any fallback,
you can easily disable it by adding a line `add_filter( 'native_lazyload_fallback_script_enabled','
__return_false' )` somewhere in your site’s codebase.

  Does this work with AMP?

If you use AMP, you don’t actually need this, since AMP intelligently lazy-loads
media out of the box. Still, the plugin is built in a way that it will not break
AMP compatibility, just to make sure.

  Where should I submit my support request?

For regular support requests, please use the [wordpress.org support forums](https://wordpress.org/support/plugin/native-lazyload).
If you have a technical issue with the plugin where you already have more insight
on how to fix it, you can also [open an issue on Github instead](https://github.com/GoogleChromeLabs/wp-native-lazyload/issues).

  How can I contribute to the plugin?

If you have some ideas to improve the plugin or to solve a bug, feel free to raise
an issue or submit a pull request in the [Github repository for the plugin](https://github.com/GoogleChromeLabs/wp-native-lazyload).
Please stick to the [contributing guidelines](https://github.com/GoogleChromeLabs/wp-native-lazyload/blob/master/CONTRIBUTING.md).

You can also contribute to the plugin by translating it. Simply visit [translate.wordpress.org](https://translate.wordpress.org/projects/wp-plugins/native-lazyload)
to get started.

## Recenze

![](https://secure.gravatar.com/avatar/e4011e7249347c4d2f90d9ad1f9243f8378a959b401ef56d32b62949f88e3029?
s=60&d=retro&r=g)

### 󠀁[It lazy loads my popups](https://wordpress.org/support/topic/it-lazy-loads-my-popups/)󠁿

 [othman19](https://profiles.wordpress.org/othman19/) 26. 7. 2022

How can I unable the lazy loading of my popups ?

![](https://secure.gravatar.com/avatar/d7965194ca94e04fb0eeddcec2bf968cb57cf25c2e5961a5e5e6f0ff04d3a646?
s=60&d=retro&r=g)

### 󠀁[Google update your products PLEASE](https://wordpress.org/support/topic/google-update-your-products-please/)󠁿

 [NikosTsolakos](https://profiles.wordpress.org/nikostsolakos/) 17. 2. 2022

Im really happy that Google is creating plugins for our projects BUT keep them up-
to-date please… you’re the God of the internet, a trillion dollar company.

![](https://secure.gravatar.com/avatar/9c4928edc97c7bc1fbcc1caa39bd7a7de114a2f6620881da4bbf773ac9593f98?
s=60&d=retro&r=g)

### 󠀁[Native lazy loading – the only viable lazy loading solution](https://wordpress.org/support/topic/native-lazy-loading-the-only-viable-lazy-loading-solution/)󠁿

 [bloup](https://profiles.wordpress.org/bloup/) 31. 12. 2020

This plugin adds loading=“lazy“ and then, the browser lazy loads the image. I think
that native lazy loading performed by the browser is the only viable solution for
lazy loading. For many years, I tried to implement lazy loading on my websites. 
I faced many issues. Once images were not crawled. Once my website was penalized
because of cloaking. Versions differed depending on the client. I am enough with
javascript scripts that slow down the pageload and negatively impact the pagespeed
insight. I think that for now and in the future, the native lazy loading is the 
only way to go for lazy loading.

![](https://secure.gravatar.com/avatar/a2bfa339f76b644688ceeb68a138f6784ce3e2ba6eaf304b88c6ea18d18574a5?
s=60&d=retro&r=g)

### 󠀁[Broken on safari](https://wordpress.org/support/topic/broken-on-safari/)󠁿

 [gkwebph](https://profiles.wordpress.org/gkwebph/) 13. 8. 2020

Hey guys – Can you please fix this in the latest Safari. Thanks!

![](https://secure.gravatar.com/avatar/8716627bd2260286260e22f120e6d154cded64c8126c75efab34e9070f9ca72f?
s=60&d=retro&r=g)

### 󠀁[It does not improve my sites](https://wordpress.org/support/topic/it-does-not-improve-my-sites/)󠁿

 [havig](https://profiles.wordpress.org/havig/) 27. 2. 2020

First, did not break my site and it did lazyload most of the page images. It does
not lazyload images if they are served from a different host. Example, unbounce,
etc. I will add another caveat, all of my images and their versions are always carefully
resized and highly compressed. Checked with lighthouse and my score took a hit downwards.
13 points down on performance score. I tested on my Staging area, uncached. FCP 
went from 2.1s to 4.2s, all of the other metrics, including time to interactive,
CPU idle, speed index and First Meaningful Paint took a dive. I will chuck this 
to I was already hyperoptimized and lazy loading is not truly needed on my site/
s. But I would advise others to try it out (not on their live site) and test speed
with Google Lighthouse before and after.

![](https://secure.gravatar.com/avatar/802f32777dc7405045f0e0b4f46413e12e9dacbd09aef8660f1b9bf026266864?
s=60&d=retro&r=g)

### 󠀁[Does what it says](https://wordpress.org/support/topic/does-what-it-says-876/)󠁿

 [shawn caza](https://profiles.wordpress.org/shawncaza/) 17. 2. 2020

Seems to work well. On browsers that don’t support lazy loading, it doesn’t seem
to load the images as soon as I would like. As in there can be a bit of a delay 
between scrolling and the image appearing on screen. Not to bad though. Not going
to worry about it as native image loading is the way of the future and will be implemented
into more browsers.

 [ Přečtěte si všech 31 recenzí ](https://wordpress.org/support/plugin/native-lazyload/reviews/)

## Autoři

Native Lazyload je otevřený software. Následující lidé přispěli k vývoji tohoto 
pluginu.

Spolupracovníci

 *   [ Felix Arntz ](https://profiles.wordpress.org/flixos90/)
 *   [ Google ](https://profiles.wordpress.org/google/)

Plugin „Native Lazyload“ byl přeložen do 17 jazyků. Děkujeme všem [překladatelům](https://translate.wordpress.org/projects/wp-plugins/native-lazyload/contributors)
za jejich pomoc.

[Přeložte “Native Lazyload” do svého jazyka.](https://translate.wordpress.org/projects/wp-plugins/native-lazyload)

### Zajímá vás vývoj?

[Prohledejte kód](https://plugins.trac.wordpress.org/browser/native-lazyload/), 
podívejte se do [SVN repozitáře](https://plugins.svn.wordpress.org/native-lazyload/),
nebo se přihlaste k[ odběru protokolu vývoje](https://plugins.trac.wordpress.org/log/native-lazyload/)
pomocí [RSS](https://plugins.trac.wordpress.org/log/native-lazyload/?limit=100&mode=stop_on_copy&format=rss).

## Přehled změn

#### 1.0.2

 * Fix broken images which are using data URI scheme (e.g. base64-encoded images).
   Props [ieim](https://github.com/ieim).
 * Fix images in IE 11 not being loaded until the user starts scrolling. Props [Soean](https://github.com/Soean).
 * Fix image loading script not working in IE10 and other browsers that do not support`
   dataset`.

#### 1.0.1

 * Improve compatibility with other plugins by using more specific class and only
   adding it for JS fallback.
 * Run lazy-load script on `DOMContentLoaded` when necessary to improve compatibility
   with plugins like Autoptimize.
 * Do not transform elements inside an AJAX response due to lack of predictability
   of the context and script execution.

#### 1.0.0

 * Initial release

## Meta

 *  Verze **1.0.2**
 *  Poslední aktualizace **před 6 roky**
 *  Aktivních instalací **6 000+**
 *  Verze WordPressu ** 4.7 nebo novější **
 *  Testováno až do WordPressu **5.3.21**
 *  Verze PHP ** 7.0 nebo novější **
 *  Jazyky
 * [Chinese (Taiwan)](https://tw.wordpress.org/plugins/native-lazyload/), [English (UK)](https://en-gb.wordpress.org/plugins/native-lazyload/),
   [English (US)](https://wordpress.org/plugins/native-lazyload/), [French (France)](https://fr.wordpress.org/plugins/native-lazyload/),
   [German](https://de.wordpress.org/plugins/native-lazyload/), [Italian](https://it.wordpress.org/plugins/native-lazyload/),
   [Japanese](https://ja.wordpress.org/plugins/native-lazyload/), [Lithuanian](https://lt.wordpress.org/plugins/native-lazyload/),
   [Norwegian (Bokmål)](https://nb.wordpress.org/plugins/native-lazyload/), [Portuguese (Brazil)](https://br.wordpress.org/plugins/native-lazyload/),
   [Portuguese (Portugal)](https://pt.wordpress.org/plugins/native-lazyload/), [Russian](https://ru.wordpress.org/plugins/native-lazyload/),
   [Spanish (Chile)](https://cl.wordpress.org/plugins/native-lazyload/), [Spanish (Spain)](https://es.wordpress.org/plugins/native-lazyload/),
   [Spanish (Venezuela)](https://ve.wordpress.org/plugins/native-lazyload/), [Swedish](https://sv.wordpress.org/plugins/native-lazyload/),
   [Ukrainian](https://uk.wordpress.org/plugins/native-lazyload/) a [Vietnamese](https://vi.wordpress.org/plugins/native-lazyload/).
 *  [Přeložte do vašeho jazyka](https://translate.wordpress.org/projects/wp-plugins/native-lazyload)
 * Štítků
 * [lazy](https://cs.wordpress.org/plugins/tags/lazy/)[lazyload](https://cs.wordpress.org/plugins/tags/lazyload/)
   [load](https://cs.wordpress.org/plugins/tags/load/)[loading](https://cs.wordpress.org/plugins/tags/loading/)
   [native](https://cs.wordpress.org/plugins/tags/native/)
 *  [Podrobnosti](https://cs.wordpress.org/plugins/native-lazyload/advanced/)

## Hodnocení

 3 z 5 hvězdiček.

 *  [  12 5hvězdičkové hodnocení     ](https://wordpress.org/support/plugin/native-lazyload/reviews/?filter=5)
 *  [  0 4hvězdičkové hodnocení     ](https://wordpress.org/support/plugin/native-lazyload/reviews/?filter=4)
 *  [  4 3hvězdičkové hodnocení     ](https://wordpress.org/support/plugin/native-lazyload/reviews/?filter=3)
 *  [  7 2hvězdičkové hodnocení     ](https://wordpress.org/support/plugin/native-lazyload/reviews/?filter=2)
 *  [  8 1hvězdičkové hodnocení     ](https://wordpress.org/support/plugin/native-lazyload/reviews/?filter=1)

[Your review](https://wordpress.org/support/plugin/native-lazyload/reviews/#new-post)

[Zobrazit všechny recenze](https://wordpress.org/support/plugin/native-lazyload/reviews/)

## Spolupracovníci

 *   [ Felix Arntz ](https://profiles.wordpress.org/flixos90/)
 *   [ Google ](https://profiles.wordpress.org/google/)

## Podpora

Potřebujete pomoc?

 [Fórum podpory](https://wordpress.org/support/plugin/native-lazyload/)