[javascript] What's the difference between event.stopPropagation and event.preventDefault?

TL;DR
event.preventDefault()
Prevents the browsers default behaviour (such as opening a link), but does not stop the event from bubbling up the DOM.

event.stopPropagation()
Prevents the event from bubbling up the DOM, but does not stop the browsers default behaviour.

return false;
Usually seen in jQuery code, it Prevents the browsers default behaviour, Prevents the event from bubbling up the DOM, and immediately Returns from any callback.

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What's the difference between event.stopPropagation and event.preventDefault?