Priority Hints

Priority Hints: hint the importance of a resource to prioritize downloading it sooner/later:

<img importance=low>

<img importance=high>

<img importance=auto> (default)

Works on <img>, <link> and fetch()

Spec: https://wicg.github.io/priority-hints/

Origin Trial: https://groups.google.com/a/chromium.org/forum/#!topic/blink-dev/jpeSdM897Xw

#javascript