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JavaScript

Posted by Ashish Mehra
Ashish Mehra
Courses Plus Student 103 Points

useCapture (EventTarget.addEventListener)

for what purpose third property i.e. useCapture of addEventListener used ?

1 Answer

mkmk
mkmk
15,897 Points

The use capture parameter is for capturing nested events, which is a bit difficult to understand without knowing how the DOM handles capturing and bubbling.

Take a look at this diagram and the accompanying docs to get a bit better of an idea : https://www.w3.org/TR/2003/NOTE-DOM-Level-3-Events-20031107/events.html#Events-phases

And this article breaks it down a bit more:
http://themousepotatowebsite.co.za/javascript-events-capturing-and-bubbling/