Using reaflow with valtio

[cqh963852]

I'm submitting a...

[ ] Regression (a behavior that used to work and stopped working in a new release)
[ ] Bug report  
[ ] Performance issue
[x] Feature request
[ ] Documentation issue or request
[ ] Other... Please describe:

I am using valtio as my state manager.

valtio allow mutate data through es6 proxy.

Current behavior

The onClick handler's node param is not the origin value.

So I can't mutate the value, and make the valtio work.

Expected behavior

Make the handler's node param same as input.

Make properties not use Spread syntax

What is the motivation / use case for changing the behavior?

If the node object is not the same as input.

I can't set the node value from eventhandler.

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The alternative is find node from nodesProxy, then change it.

But if I can change the node in event handler that would be more convenient.