React: onMouseEnter is fired on disabled buttons

[diegohaz]

Do you want to request a feature or report a bug?

bug

What is the current behavior?

onMouseEnter is fired on disabled buttons.

If the current behavior is a bug, please provide the steps to reproduce and if possible a minimal demo of the problem. Your bug will get fixed much faster if we can run your code and it doesn't have dependencies other than React. Paste the link to your JSFiddle (https://jsfiddle.net/Luktwrdm/) or CodeSandbox (https://codesandbox.io/s/new) example below:

https://codesandbox.io/s/react-onmouseenter-on-disabled-buttons-fskwd

What is the expected behavior?

onMouseEnter shouldn't be triggered on disabled buttons.

Which versions of React, and which browser / OS are affected by this issue? Did this work in previous versions of React?

React 16.11.0 (not sure when it started to happen)
Chrome/MacOS

[edwincoronado]

Taking a look at this to see if I can fix it.

[abrahamwilliam]

@edwincoronado @diegohaz

I have identified the fix to this issue/Bug, just testing it.I am proceeding to it, please let me know if any issues.

[AlfredoGJ]

I submitted a pull request that solves this problem. If someone wants to take a look. Feedback is welcome.

[gaearon]

Should be fixed in 16.13.
https://reactjs.org/blog/2020/03/02/react-v16.13.0.html