UI Infrastructure: Event Bubbling

[revery-ui]

UI Infrastructure: Event Bubbling

[akinsho]

Gonna give this a go, but might reach out for help at some point 👍

[bryphe]

Sweet, thanks @Akin909 ! Let me know if you have questions 😄

One suggestion: I find a good starting point for these is sketching out some tests - helps me figure out how to make some of the abstract concepts more concrete and actionable, and start to think about how the pieces fit together.

We have a few tests here that exercise events already: https://github.com/revery-ui/revery/blob/master/test/UI/MouseTest.re

So I could see expanding on them - like tests that:

• dispatches a MouseDown event on a child element, and verify the handler for both child and parent get called
• dispatches a MouseDown event on a child element, calls stopPropagation, and verifies the handler for the parent does not get called.