MDN URL
https://developer.mozilla.org/en-US/docs/Web/API/Element/keyup_event
What specific section or headline is this issue about?
the keyup event has a non documented and unexpected behavior
What information was incorrect, unhelpful, or incomplete?
With the keydown event, its property, 'e.ctrlKey' will be reported correctly, however with the keyup event, it doesn't set the ctrlKey property at all, regardless of if they keycode is ctrl or not. Is this intended behavior that's simply not documented anywhere?
What did you expect to see?
I expected to see a disclaimer about this strange behavior.
Do you have any supporting links, references, or citations?
umm see below
Do you have anything more you want to share?
super short html snippet that replicates it. This behavior doesn't make any sense and to me is this way on both firefox and chromium, versions 152.0 and 150.0.7871.186 respectively. So I feel like it should be documented. Is this truly the intended ecma standard?
<head>
<script>
function showChar(e) {
output.textContent += `${e.type}: "${e.key}"\n${e.type} ctrlKey: ${e.ctrlKey}\n`;
}
window.onload = ()=>{
document.addEventListener("keydown", showChar)
document.addEventListener("keyup", showChar);
}
</script>
</head>
<body>
<pre id="output"></pre>
</body>MDN metadata
Page report details
MDN URL
https://developer.mozilla.org/en-US/docs/Web/API/Element/keyup_event
What specific section or headline is this issue about?
the keyup event has a non documented and unexpected behavior
What information was incorrect, unhelpful, or incomplete?
With the keydown event, its property, 'e.ctrlKey' will be reported correctly, however with the keyup event, it doesn't set the ctrlKey property at all, regardless of if they keycode is ctrl or not. Is this intended behavior that's simply not documented anywhere?
What did you expect to see?
I expected to see a disclaimer about this strange behavior.
Do you have any supporting links, references, or citations?
umm see below
Do you have anything more you want to share?
super short html snippet that replicates it. This behavior doesn't make any sense and to me is this way on both firefox and chromium, versions 152.0 and 150.0.7871.186 respectively. So I feel like it should be documented. Is this truly the intended ecma standard?
MDN metadata
Page report details
en-us/web/api/element/keyup_event