some questions

[fingerpan]

i read your code and i have some questions.
1: if the ouside element make a event stopPropagation, your code maybe can not work
2: addEventListener too much

[simplesmiler]

Hi, thanks for taking your time to read the code!

You are correct regarding the stopPropagation, and this is exactly why it's recommended not to use stopPropagation unless you know exactly what you are doing.

Regarding event listeners, alternative to this is to use a custom event emitter, and to have a single event listener on the document root that would notify all custom listeners. But I'm not sure this would significantly improve performance.