Lazy loading images with the loading attribute
Written byPhuoc Nguyen
Created
12 Apr, 2021
Category
Tip
Tags
HTML
By default, the browser will download all images found on a page no matter where they are located. To improve the user experience, we often use the Intersection Observer API or external libraries to lazy load images.
The lazy loading means that an image is only downloaded to the client when it's available in the browser's viewport.
In the latest version of Chromium-powered (including Chrome, Edge and Opera) and Firefox browsers support it natively with the
`loading="lazy"` attribute:html
<img src="..." alt="..." loading="lazy" />The browser now will defer the loading of images until they are visible in the viewport.
It's common to see that the layout is shifted when an image is loaded completely. To avoid the issue, it's recommended to set the size of image using either inline styles or the attributes:
html
<img loading="lazy" style="height: 200px; width: 300px;" />
<!-- Or -->
<img loading="lazy" height="200" width="300" />
Questions? 🙋
Do you have any questions about front-end development? If so, feel free to create a new issue on GitHub using the button below. I'm happy to help with any topic you'd like to learn more about, even beyond what's covered in this post.
While I have a long list of upcoming topics, I'm always eager to prioritize your questions and ideas for future content. Let's learn and grow together! Sharing knowledge is the best way to elevate ourselves 🥷.
Recent posts ⚡
Newsletter 🔔
If you're into front-end technologies and you want to see more of the content I'm creating, then you might want to consider subscribing to my newsletter.
By subscribing, you'll be the first to know about new articles, products, and exclusive promotions.
Don't worry, I won't spam you. And if you ever change your mind, you can unsubscribe at any time.
Phước Nguyễn