Resource Hints: Lazyload
Gives a hint to the browser to lower the loading priority of a resource. Please note that this is a legacy attribute, see the [`loading`](https://caniuse.com/#feat=loading-lazy-attr) attribute for the new standardized API.
Lazy loading via attribute for images & iframes
The `loading` attribute on images & iframes gives authors control over when the browser should start loading the resource.