Pen Settings

HTML

CSS

CSS Base

Vendor Prefixing

Add External Stylesheets/Pens

Any URL's added here will be added as <link>s in order, and before the CSS in the editor. If you link to another Pen, it will include the CSS from that Pen. If the preprocessor matches, it will attempt to combine them before processing.

+ add another resource

JavaScript

Babel is required to process package imports. If you need a different preprocessor remove all packages first.

Add External Scripts/Pens

Any URL's added here will be added as <script>s in order, and run before the JavaScript in the editor. You can use the URL of any other Pen and it will include the JavaScript from that Pen.

+ add another resource

Behavior

Save Automatically?

If active, Pens will autosave every 30 seconds after being saved once.

Auto-Updating Preview

If enabled, the preview panel updates automatically as you code. If disabled, use the "Run" button to update.

Format on Save

If enabled, your code will be formatted when you actively save your Pen. Note: your code becomes un-folded during formatting.

Editor Settings

Code Indentation

Want to change your Syntax Highlighting theme, Fonts and more?

Visit your global Editor Settings.

HTML

              
                  <h1>Native lazy load in Chrome 75</h1>

  <p>Chrome 75 adds support for native lazy loading using the <code>loading</code> attribute. It works for images and iframes.
<p>If you want to see what it looks like with images, see <a href="https://mathiasbynens.be/demo/img-loading-lazy">https://mathiasbynens.be/demo/img-loading-lazy</a></p>
  <hr/>
  <figure>
    <img data-src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/32795/chile-01.jpg"
         alt="Image of a bookshelf"
         class="lazy"/>
  </figure>
  <p>I'm here to ensure the League of Shadow fulfills its duty to restore balance to civilization. You yourself fought the decadence of Gotham for years with all your strength, all your resources, all your moral authority. And the only victory you achieved
      was a lie. Now, you understand? Gotham is beyond saving and must be allowed to die.</p>
    <p>Okay. Now... Hardened Kevlar plates over titanium-dipped, tri-weave fibers for flexibility. You'll be lighter, faster, more agile.</p>
    <p>I can't do that as Bruce Wayne... as a man. I'm flesh and blood. I can be ignored, destroyed. But as a symbol, I can be incorruptible, I can be everlasting.</p>
    <p>Justice is about harmony. Revenge is about you making yourself feel better.</p>
    <p>I know why you choose to have your little, ahem... group-therapy sessions in broad daylight. I know why you're afraid to go out at night. The Batman.</p>
    <p>Carbon fiber, .28 caliber, made in China. If you wanna kill a public servant, Mr Maroni... I recommend you buy American.</p>
    <p>I am the League of Shadows.</p>
    <p>Ah yes! I was wondering what would weight first. Your spirit... or your body?</p>
    <p>You have learn to bury your guilt with anger. I will teach you to confront it and to face the truth.</p>
    <p>Bruce Wayne! Design, live and breathe. What brings you out of the prior sleep, Mr. Wayne?</p>
    <p>You have inspired good. But you spat in the faces of Gotham's criminals. Didn't you think there might be casualties? Things always get worse before they get better.</p>
    <p>But no ordinary child, a child born in hell, forged from suffering, hardened by pain. Not a man from privilege.</p>
    <p>Didn't you get the memo?</p>
    <p>You should use your full name. I like that name, Robin.</p>

<img  data-src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/32795/chile-02.jpg"
      loading="lazy" alt="Image of a bookshelf"
      class="lazy"/>

<p>You wanna know how I got them? So I had a wife. She was beautiful, like you, who tells me I worry too much, who tells me I ought to smile more, who gambles and gets in deep with the sharks. Hey. One day they carve her face. And we have no money for
      surgeries. She can't take it. I just wanna see her smile again. I just want her to know that I don't care about the scars. So, I do this to myself. And you know what? She can't stand the sight of me. She leaves. Now I see the funny side. Now I'm
      always smiling.</p>
    <p>Well, you see... I'm buying this hotel and setting some new rules about the pool area.</p>
    <p>The first time I stole so that I wouldn't starve, yes. I lost many assumptions about the simple nature of right and wrong. And when I traveled I learned the fear before a crime and the thrill of success. But I never became one of them.</p>
    <p>Introduce a little anarchy, upset the established order and everything becomes chaos. I'm an agent of chaos. Oh, and you know the thing about chaos? It's fair.</p>
    <p>You fight like a younger man, there's nothing held back. It's admirable, but mistaken.</p>
    <p>Seven hundred twelve counts of extortion. Eight hundred and forty-nine counts of racketeering. Two hundred and forty-six counts of fraud. Eighty-seven counts of conspiracy murder.Five hundred and twenty-seven counts of obstruction of justice. How
      do the defendants plead?</p>

<img  data-src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/32795/chile-04.jpg"
      loading="lazy" alt="Image of a bookshelf"
      class="lazy"/>


              
            
!

CSS

              
                @import url('https://fonts.googleapis.com/css?family=Raleway');

body {
  margin: 0;
  padding: 1em;
  width: 60%;
  font-family: Raleway, sans-serif;
}

img {
  width: 60vw;
  height: auto;
}
              
            
!

JS

              
                (async () => {
  if ('loading' in HTMLImageElement.prototype) {
    const images = document.querySelectorAll("img.lazy");
    images.forEach(img => {
        img.src = img.dataset.src;
    });
  } else {
    // Initialize Yall
    document.addEventListener("DOMContentLoaded", yall);
  }
})();
              
            
!
999px

Console