[pointerevents] Different mousedown behavior between Firefox and Chrome/Safari (#610)

nuragic has just created a new issue for https://github.com/w3c/pointerevents:

== Different mousedown behavior between Firefox and Chrome/Safari ==
Hi,

After reading [this issue](https://github.com/facebook/react/issues/12584) and realizing that Chrome and Firefox handle the change event in different ways, I cannot find an answer to this one... I made a simple pen to illustrate the example (no React, just plain HTML): https://codepen.io/nuragic/pen/xWMaGN?editors=1011

### Steps to reproduce

Just click on the `select` and pick any value.

### Results


Chrome / Safari:
```
"onmousedown"
"onchange"
```

Firefox:
```
"onmousedown"
"onmousedown"
"onchange"
```

😕 

The spec https://w3c.github.io/uievents/#event-type-mousedown says:

> A user agent MUST dispatch this event when a pointing device button is pressed over an element.

Could anyone clarify which one is correct (or if both are ok)?

Thanks! 

Please view or discuss this issue at https://github.com/w3c/pointerevents/issues/610 using your GitHub account


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Received on Monday, 12 January 2026 22:04:19 UTC