Just prepare your elements and add a little snippet to your page. Prepare the elements you want to lazy load. By default add a data-src attribute to elements containing the loadable image or a data-loader attribute to elements witch shall use a plugin or custom loaders. Start using Lazy by calling it after page load.

Simple Lazy Loading It involves adding a single attribute to the image tag. By setting the “loading” attribute to “lazy,” you enable lazy loading for that particular image. The browser then takes care of determining the optimal time to download the image based on its proximity to the visible part of the screen.

Implementing lazy loading First, we can use the default browser attribute. This involves using the loading attribute, which can be used on <img> and <iframe> HTML elements. Setting the loading to "lazy" lets the browser know to load the element as it approaches the viewport.

To implement lazy load background images using CSS, you can use the data-src attribute to set the image's source. Then, use JavaScript to switch the attribute to src when the image is in the viewport.