使用jQuery为元素的高度设置动画 [英] animating an element's height using jquery

问题描述

我有一些条以高度％填充，但是恰好在页面加载时，我希望所有条都填充然后减小到0.我知道如何用for循环填充它:

I have some bars that are filled with a height %, but right when the page loads I would like all the bars to fill up and then decrease to 0. I know how to fill it up with a for loop:

for(i = 1; i <= 100; i++)

但是要让它回来

for(i = 100; i == 100; i--)

我只是不确定如何将它们放在一起以使变量变为100，然后又减小回零?

I'm just not sure how to put them together to make the variable i go to 100 then decrease back down to 0?

推荐答案

您在寻找:

for(i = 100; i >= 0; i--)

但是您可以这样做 slideUp :

But you could just do this slideUp:

$('someElement')
    .hide()
    .slideDown(500, function () {
        $(this).slideUp(500);
    });

以上内容将根据需要设置元素的动画.如果您甚至想做更复杂的 animate 动画，该代码大致等同于以下内容:

The above would animate the element like you want. That code equates to roughly the following, in case you even want to do more complicated animate animations:

$('someElement')
   .hide()
   .animate({ height: '100%' }, 500, function () {
        $(this).animate({ height: 0 }, 500);
    });

更新:这是 jsFiddle 的演示

Update: Here is a jsFiddle demonstration.

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