Will this event still trigger if someone isn't clicking it? For instance, through keyboard tabbing & spacebar?

According to https://www.w3.org/TR/uievents/#legacy-uievent-event-order
keyboard's spacebar will change the checkbox's checked status and trigger click event. If the browser supports the spacebar, it should also trigger the click event.

It does on my Mac chrome, I'll have a check on IE's behavior and IE also has consistent behavior.

Hmm, the CI failed after merging (but it was passing for the PR itself...) Need to investigate a bit more.

I'll take a look.

Something wrong with the checkbox test case. The checkbox and radio need the same test case, so I made a mistake when doing it. I'll check why it works in the PR.

@yyx990803 Found that I worked on the Version 2.1.7 with the true-value equal issue, so the wrong test case was passing. Sorry for that mistake, I'll update it.

I'll also update the contribution guide later.