Browsers. Are. Crazy.
In JSDOM, when you fire an event, you only get that specific event. You
don't get all the magic that the browser gives you. For example, when
you are focused on a button and press to "Tab" then in JSDOM you would
only get a keydown event. However in the browser you get this chain of
events:
1. `keydown` on the current element
2. `blur` on the current element
3. `focus` on the new element
4. `keyup` on the new element
I implemented this "magic", for the `Tab`, `Enter` and `Space` key for
now. Those are the most important currently. `Enter` and `Space` also
trigger `click` events for example.
I also have a "generic" implementation, where a normal press results in:
1. `keydown`
2. `keypress` (in case it has a `charCode` and is "printable", so `alt`
is ignored)
3. `keyup`
I also ensured that the cancelation when you use an
`event.preventDefault()` happens correctly.
Here is a fun summary: https://twitter.com/malfaitrobin/status/1354472678128820234
Press "Enter" on a button
-> keydown, keypress, click, keyup
Press "Space" on a button
-> keydown, keypress, keyup, click
Press "Enter" or "Space" on a button, with event.preventDefault() in the keydown listener
-> keydown, keyup
Press "Enter" on a button, with event.preventDefault() in the keypress listener
-> keydown, keypress, keyup
Press "Space" on a button, with event.preventDefault() in the keypress listener
-> keydown, keypress, keyup, click
Robin Malfait