Description

It's impossible to pass extraParameters for checkbox click handlers.

Duplicate of #2768

Source of error:

I did not have time to look into the full history of why this was added but it does not seem right to me. If you want to make sure checked state is set consistently, do so explicitly.

Link to test case

https://jsfiddle.net/xpvt214o/509284/

What do you expect to happen?

"Hello, world" to be displayed, using extraParameters.

What actually happens?

ExtraParameters are discarded.