That code would append the href attribute as text to the body every time a link was clicked but not actually go to that link. The return false; part of that code prevents the browser from performing the default action for that link. That exact thing could be written like this:
The difference is that return false; takes things a bit further in that it also prevents that event from propagating (or “bubbling up”) the DOM. The you-may-not-know-this bit is that whenever an event happens on an element, that event is triggered on every single parent element as well. So let's say you have a box inside a box. Both boxes have click events on them. Click on the inner box, a click will trigger on the outer box too, unless you prevent propagation. Like this: 演示地址:http://css-tricks.com/examples/ReturnFalse/ So in other words:
