return false;
will stop the event from bubbling up AND suppress the default action.
In otherwords, returning false is analogous to these two lines
event.stopPropagation();
event.preventDefault();
For events that bubble and are cancelable, at least.
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…