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Lazy loading via attribute for images & iframes

70.63

HTML5

The `loading` attributing on images & iframes gives authors control over when the browser should start loading the resource.

Further reading:

  1. Can I use page for: Lazy loading via attribute for images & iframes
  2. Blog post
  3. Explainer
  4. WebKit support bug
  5. Firefox support bug for lazy loading iframes
  6. Polyfill