on contentEditable，onMouseUp trigger before onMouseDown.

[sunus]

Mac OS (Big Sur) to Ventura still Reproduce.

Steps To Reproduce:

set div contentEditable
div addEventListener onMouseUp and onMouseDown
onMouseUp trigger before onMouseDown
Link to code example:

<div
  onMouseDown={() => {console.log('mouse down')}}
  onMouseUp={() => {console.log('mouse up')}}
  suppressContentEditableWarning
  contentEditable>
  Test ContentEditable In Safari
</div>

see detail in this comment:
https://github.com/facebook/react/issues/20787#issuecomment-1279942233

[sunus]

you can test with 3rd IME:
https://ime.sogouimecdn.com/202303131007/25a473fc3c1e842b12969744bfc7ca75/dl/gzindex/1678360775/sogou_mac_guanwang_614b.zip

[Sam Sneddon [:gsnedders]]

From the React issue:

> I suspect that this is related to the third-party IME. When switching to a third-party IME (such as Sogou, Baidu IME), this problem sometimes occurs.

[sunus]

(In reply to Sam Sneddon [:gsnedders] from comment #2)
> From the React issue:
> 
> > I suspect that this is related to the third-party IME. When switching to a third-party IME (such as Sogou, Baidu IME), this problem sometimes occurs.

i am not very sure, we also test some other thir-party IME besides(Sogou, Baidu), this still happening. and it's ok in Chrome.

[Radar WebKit Bug Importer]

<rdar://problem/106923953>

[sunus]

and updates?

[alex_pan]

we have same problem since 2021/03, any updates?

[sunus]

any updates?

[Alexey Proskuryakov]

*** This bug has been marked as a duplicate of bug 219670 ***