return false
from within a jQuery event handler is effectively the same as calling bothe.preventDefault
ande.stopPropagation
on the passed jQuery.Event object.e.preventDefault()
will prevent the default event from occuring,e.stopPropagation()
will prevent the event from bubbling up andreturn false
will do both. Note that this behaviour differs from normal (non-jQuery) event handlers, in which, notably,return false
does not stop the event from bubbling up.