onChange event on radio

[yankouskia]

Could you please, explain this behaviour?

Here: https://jsfiddle.net/69z2wepo/67116/ - clicking on radio always emits onClick and onChange events

Here is example without React: https://jsfiddle.net/8mnjtt8w/4/ - clicking on radio emits only onClick event.

Thank you!

[aweary]

@yankouskia React special cases onChange, meaning it doesn't necessarily correspond to the DOM change event, in order to make it easier to handle inputs. For example, change events usually occur for text inputs on blur, but most people expect them to occur when the input's value is actually changed, so we normalize that. You can see this behavior documented here

Now, that said, this is still unexpected behavior since the radio input's value isn't changed. This was already reported in #1471 and resolved in #5746. But #5746 has not been released yet. We're hoping to get it released soon thanks to the backport PR opened at #8575

tl;dr: we normalize input events in general, but this radio input behavior is wrong and already fixed. We're working on getting it released 👍

[yankouskia]

@aweary , thank you! 👍

[wangcongyi]

@aweary the lastest version 15.4.2 does not seem to fix the bug ，how to solve the old version of it?