SolidJS•16mo ago

Solid PointerEvents, Firefox, RequestAnimationFrame and OffsetX/Y

Here's one that took up a bit of my afternoon after I wrote a RAF debouncer. Does Solid 'do' anything with events, like React does, or are they simply browser events? If you do an addEventListener on an element for pointermove, and place these in the handler:

  requestAnimationFrame(() => {
      console.log(`event RAF`, event.offsetX, event.offsetY);
  });

  console.log(`event`, event.offsetX, event.offsetY);

  requestAnimationFrame(() => {
      console.log(`event RAF`, event.offsetX, event.offsetY);
  });

  console.log(`event`, event.offsetX, event.offsetY);

In Firefox you'll get

19:33:46.808 event RAF 0 0 
19:33:46.824 event 1035 164 
19:33:46.826 event RAF 0 0 
19:33:46.840 event 1039 154 
19:33:46.841 event RAF 0 0

19:33:46.808 event RAF 0 0 
19:33:46.824 event 1035 164 
19:33:46.826 event RAF 0 0 
19:33:46.840 event 1039 154 
19:33:46.841 event RAF 0 0

in all other browsers, you'll get what you'd expect.

event RAF – 815 – 1064
event RAF – 808 – 1089
event – 802 – 1124 
event – 791 – 1182 
event RAF – 802 – 1124
event RAF – 791 – 1182

event RAF – 815 – 1064
event RAF – 808 – 1089
event – 802 – 1124 
event – 791 – 1182 
event RAF – 802 – 1124
event RAF – 791 – 1182

Is this a Firefox bug, or could it possibly be something solid is doing

2 Replies

lxsmnsyc•16mo ago

most likely a Firefox bug

Some Call Me Tim•16mo ago

k, that's what I thought. Just checking, thanks.

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Solid PointerEvents, Firefox, RequestAnimationFrame and OffsetX/Y