AFAICT this is an issue that is common to all worklets. The initial modules parsing/executing logic is responsible for this. So assigning to nhiroki@ who can further triage this.


Here is a simple repro showing the same issue for Paint, Audio and Animation Worklets (just run this in devtools console):



function urlFromText(text) {
  const blob = new Blob([text], {type: "text/javascript"});
  return URL.createObjectURL(blob);
}

CSS.paintWorklet.addModule(urlFromText("var var;"));
CSS.animationWorklet.addModule(urlFromText("var var;"));


let context = new AudioContext();
context.audioWorklet.addModule(urlFromText("var var;"))

nhiroki@ This is making any syntax issue that happens inside worklet context very opaque and confusing and surma@ believe this is creating bad DevX for worklets. Is there anyway we can prioritize this fix?

Also, is this a regression?

/cc japhet@ and @panicker per Ian's suggestion.

Sorry for my delayed reply. This issue is the same with issue 782066 that has been blocked by the spec issue. I'll activate the discussion again.