This appears to be related to a bug in src/renderers/dom/client/eventPlugins/ChangeEventPlugin.js. ChangeEventPlugin.extractEvents does not accept the nativeEventTarget argument and does not pass it on to SyntheticEvent.getPooled.

However that's not the only fix needed, manualDispatchChangeEvent also needs to pass something in place of the nativeEventTarget that SyntheticEvent.getPooled expects.

Also it seems BeforeInputEventPlugin has the same issue with nativeEventTarget being passed.

I tried fixing this myself. However I have issues with the test setup and/or the test utils seem incapable of triggering change from input.

Yes I can confirm I have this issue too! This unfortunately makes the beta unusable in my app.

The synteticEvent.target is null while the native event has a target

Same issue. The workaround is using e.currentTarget.value instead of e.target.value. But that's kinda wrong :(

Same here, but you can use e.nativeEvent.target for now.

Excuse me. I'm a beginners of React. Can I ask a question? Why can I use "jsx -watch src/build" to translate "src/helloworld.js" file to plain JavaScrip?

In fact, I can't see any result after do all steps。

@Jackien I don't know, but this is not the place for asking such questions. Ask this on Stackoverflow or IRC / Slack channels maybe

@slorber Thank you for your answer.