jquery: why css('width') returns different value than width()

问题

When I run following code:

        node = $('.period')
        alert(node.width() + ' ' + node.css('width'))

i get '0 144px'. How is that possible?

回答1:

Maybe you're calling it on $(document).ready, and as width() Gets the current computed, pixel, width of the first matched element., it'd be 0 as it has not been rendered yet...
css('width') however reads from the css stylesheet, which would be already available.

来源：https://stackoverflow.com/questions/1212790/jquery-why-csswidth-returns-different-value-than-width