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花式使用CSS3 transition_html/css_WEB-ITnose

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Release: 2016-06-21 09:01:14
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本文讲介绍 :hover、 :active、 :focus、 :checked、 Media Queries、 JavaScript控制六种方法触发CSS3 transition,以及 transitionend事件的使用。

:hover

最常见的是用hover:

<div class="hover">:hover</div>.hover {  width: 100px;  height: 100px;  background: #222;  color: white;  text-align: center;  transition: all 2s ease;}.hover:hover {  width: 200px;  height: 200px;}
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Demo

:active

mousedown s时触发:

<div class="active">:active</div>.active {  width: 100px;  height: 100px;  background: #222;  color: white;  text-align: center;  transition: all 2s ease;}.active:active {  width: 200px;  height: 200px;}
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Demo

:focus

文本框聚焦时(这个在很多网站的搜索框的动画效果里用到):

<div class="focus">  <input type="text" /></div><div class="focus">  <textarea name="" id="" cols="30" rows="10"></textarea></div>.focus input, .focus textarea {  width: 200px;  transition: width 1s ease;}.focus input:focus, .focus textarea:focus {  width: 300px;}
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Demo

:checked

用于checkboxes 和 radio buttons 被选中时:

<div>    <input type="checkbox" name="things" value="thing1"> Input 1<br>    <input type="checkbox" name="things" value="thing2"> Input 2<br>    <input type="checkbox" name="things" value="thing3"> Input 3<br>  <input type="checkbox" name="things" value="thing4"> Input 4<br></div>    input[type="checkbox"]:checked {  height: 20px;  transition: all 1s ease;}input[type="checkbox"]:checked {  width: 30px;}
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Demo

Media Queries

改变浏览器窗口大小时触发:

<div class="media">media</div>.media {  width: 200px;  height: 200px;  background: #222;  color: white;  text-align: center;  transition: width 1s ease;}@media only screen and (max-width : 960px) {  .media {    width: 100px;    height: 100px;  }}
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Demo

JavaScript事件触发CSS3 transition

通过 JavaScript 或者 jQuery 添加、删除class来完成动画,CSS格式类似 :hover。

例如:

以 click 事件为例,当点击方块时,变化长宽、背景色:

HTML:

<div class="box"></div>
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CSS:

.box {  width: 200px;  height: 200px;    background: black;  -webkit-transition: all 2s ease;  -moz-transition: all 2s ease;  -o-transition: all 2s ease;  transition: all 2s ease;}.box.clicked {  width: 300px;  height: 300px;    background: blue;}
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JavaScript:

$(".box").click(function() {    $(this).toggleClass("clicked");});
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Demo

如果用原生JavaScript,可以自己写个添加和删除类的函数。

transitionend 事件

transitionend 事件会在 CSS transition 结束后触发。兼容Chrome、Firefox、Safari、IE10+:

element.addEventListener('transitionend', callback, false);
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为保证低版本兼容性可以写webkitTransitionEnd(WebKit )、otransitionend(Opera)、MSTransitionEnd(IE 10+)、transitionend(Mozilla)。 详见此讨论。

有没有渐变开始的事件?目前只有IE 10+ 有 transionstart 事件,W3C目前未有此标准。

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