jQuery 动画高度 [英] jQuery animate height

问题描述

我有一个按钮和一个 div，里面有一些文字:

I have a button and a div with inside some text:

<h2>Click me</h2>
<div class="expand">Lot of text here....</div>

我想默认只显示 2 行文本，所以我将高度设置为 30 像素并溢出隐藏.

I want to show just 2 rows of the text as default, so I put height to 30px and overflow Hidden.

当我点击 H2 元素时，我希望将文本设置为向下滑动，如果我再点击一次，它将向上滑动到默认高度(30 像素).

When I click on the H2 element I want animate the text to slideDown and if i click another time it will slideUp to the default height (30px).

我用 jQuery 尝试了很多东西，但它不起作用.

I'm trying many things with jQuery, but it doesn't work.

我也有不止一个展开"和不止一个H2"，文本和 div 不同，所以高度不是固定的...我想滑动到自动"高度或 100%.

I also have more than one "expand" and more than one "H2" and text is different into div, so the height is not fix... I would like to slide to the "auto" height or 100%.

有人可以帮我吗?谢谢！

Can someone help me? Thanks!

推荐答案

您可以在页面加载时将其缩小到 30px 之前存储高度，例如:

You can store the height just before slimming it down to 30px on page load, for example:

$(".expand").each(function() {
  $.data(this, "realHeight", $(this).height());
}).css({ overflow: "hidden", height: "30px" });

然后在您的 click 处理程序中:

Then in your click handler:

$("h2").toggle(function() {
  var div = $(this).next(".expand")
  div.animate({ height: div.data("realHeight") }, 600);
}, function() {
  $(this).next(".expand").animate({ height: 30 }, 600);
});

所以它所做的是获得 .height()(在 document.ready) before overflow: hidden 它设置，并通过 $.data()，然后在 click 处理程序中(通过 .toggle() 替代)，我们使用该值(或 30)每隔一次点击 .animate() to.

So what this does is get the .height() (run this in document.ready) before the overflow: hidden it set, and stores it via $.data(), then in the click handlers (via .toggle() to alternate), we use that value (or 30) every other click to .animate() to.

这篇关于jQuery 动画高度的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！