问题:

What is the exact difference between live() and ready()?

Edit: found that die() is the opposite of live()

回答1:

.ready() lets you register a callback that fires when the DOM is ready - this is similar to using window.onload but fires earlier (and you can register more than one callback).

.live() lets you register a callback to a range of events based on a selector, which continually monitors the DOM and will register itself to new nodes that are added.

回答2:

live is used for attaching events to a current selector and all future matching selectors.

ready binds a function to be executed whenever the DOM is ready to be traversed and manipulated

回答3:

ready() fires once after the DOM has finished loading and is ready to be traversed and manipulated. Basically a replacement for the old trustworthy onload event on window (similar but not identical)

With live() you specify a selector and jQuery then attaches the function you specify as second argument to all elements matched now and in future (add to to DOM dynamically) for the event specified as first argument