Lazy loading is a strategy to identify resources as non-blocking and load them only when needed. It's a way to shorten the length of the critical rendering path, which translates into reduced page load times.
You should load images only when they're needed on a page, and consider using placeholders until customers scroll down the page. This can also help with perceived performance as the page looks like it’s loading quicker than it actually is. Rather than using a library, you should set your img or srcset's
loading attribute to
You should apply
loading="lazy" only to elements that aren't initially visible when the page loads. Only images that require user interaction can be safely lazy loaded without negatively impacting the rendering performance. For example, user interactions might include clicking, hovering, or scrolling.
The following examples contain code snippets that either fail or pass this check.
Disabling this checkAnchor link to section titled "Disabling this check"
If you don't want to defer the loading of images, then you can disable this check. However, you should consider specifying
loading="eager" for images that you don't want to lazy-load, such as images in sections that might be placed in different locations on a page.