Render-blocking scripts should also work for inline scripts

[noamr]

What is the issue with the HTML Standard?

Currently, script can block rendering only if they have a src attribute: see https://html.spec.whatwg.org/multipage/scripting.html#script-processing-model:block-rendering.

This creates an artificial constraints, where you have to make scripts external in order to make them render-blocking.
For example, the following doesn't work:

<script blocking="render" async>
  requestAnimationFrame(() => { doSomethingOnFirstFrame() });
</script>
<!-- or -->
<script blocking="render" type="module">
  requestAnimationFrame(() => { doSomethingOnFirstFrame() });
</script>

To make it work properly, the developer has to either put it in an external JS file or use parser-blocking classic scripts, which is an inferior workaround.

This becomes especially cumbersome when dealing with the pagereveal event, as registering to that event has to be done in a render-blocking script.

The proposal is to remove that limitation and allow any inline script to be render-blocking.

[zcorpan]

This seems reasonable to me.

[noamr]

This seems reasonable to me.

Thanks @zcorpan! Doe mozilla/standards-positions#608 cover this or should I file a new standards position isssue?

[zcorpan]

@noamr the same s-p issue seems fine. Can you comment there and link to this issue? Thanks.