Starting in Chrome 75 (and currently available in Chrome Canary under a flag), the browser will handle lazyloading of images and iframes, with "lazy", "eager", and "auto" values for a "loading" attribute. Whatwg seems on track to standardize it, so it looks like yet another thing to validate.
Human readable article on the new feature by a Googler: https://addyosmani.com/blog/lazy-loading/
GitHub techy description: https://github.com/scott-little/lazyload
Whatwg tech work on it: https://github.com/whatwg/html/pull/3752/files
lazyloading attributes coming to Chrome
- Albert Wiersch
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Re: lazyloading attributes coming to Chrome
Thanks! I'll add support for the "loading" attribute in the next CSS HTML Validator update.
UPDATE: Added (for next update)!
UPDATE: Added (for next update)!
Albert Wiersch, CSS HTML Validator Developer • Download CSS HTML Validator FREE Trial