83 lines
3.0 KiB
Markdown
83 lines
3.0 KiB
Markdown
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---
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id: bad87fee1348bd9aedc08826
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title: Target Elements by Class Using jQuery
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required:
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- link: 'https://cdnjs.cloudflare.com/ajax/libs/animate.css/3.2.0/animate.css'
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challengeType: 6
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videoUrl: ''
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localeTitle: 使用jQuery按类目标元素
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---
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## Description
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<section id="description">您看到我们如何使所有<code>button</code>元素反弹？我们用<code>$("button")</code>选择它们，然后我们用<code>.addClass("animated bounce");</code>为它们添加了一些CSS类<code>.addClass("animated bounce");</code> 。您刚刚使用了jQuery的<code>.addClass()</code>函数，它允许您向元素添加类。首先，让我们使用<code>$(".well")</code>选择器将你的<code>div</code>元素与类<code>well</code>对准。请注意，就像CSS声明一样，您键入一个<code>.</code>在课堂名称之前。然后使用jQuery的<code>.addClass()</code>函数中添加类<code>animated</code>和<code>shake</code> 。例如，您可以通过将以下内容添加到<code>document ready function</code>来创建具有类<code>text-primary</code> shake的所有元素： <code>$(".text-primary").addClass("animated shake");</code> </section>
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## Instructions
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<section id="instructions">
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</section>
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## Tests
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<section id='tests'>
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```yml
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tests:
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- text: 使用jQuery <code>addClass()</code>函数为类赋予<code>animated</code>并使用类<code>well</code> <code>shake</code>所有元素。
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testString: 'assert($(".well").hasClass("animated") && $(".well").hasClass("shake"), "Use the jQuery <code>addClass()</code> function to give the classes <code>animated</code> and <code>shake</code> to all your elements with the class <code>well</code>.");'
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- text: 只使用jQuery将这些类添加到元素中。
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testString: 'assert(!code.match(/class\.\*animated/g), "Only use jQuery to add these classes to the element.");'
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```
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</section>
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## Challenge Seed
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<section id='challengeSeed'>
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<div id='html-seed'>
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```html
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<script>
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$(document).ready(function() {
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$("button").addClass("animated bounce");
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});
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</script>
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<!-- Only change code above this line. -->
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<div class="container-fluid">
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<h3 class="text-primary text-center">jQuery Playground</h3>
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<div class="row">
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<div class="col-xs-6">
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<h4>#left-well</h4>
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<div class="well" id="left-well">
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<button class="btn btn-default target" id="target1">#target1</button>
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<button class="btn btn-default target" id="target2">#target2</button>
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<button class="btn btn-default target" id="target3">#target3</button>
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</div>
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</div>
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<div class="col-xs-6">
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<h4>#right-well</h4>
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<div class="well" id="right-well">
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<button class="btn btn-default target" id="target4">#target4</button>
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<button class="btn btn-default target" id="target5">#target5</button>
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<button class="btn btn-default target" id="target6">#target6</button>
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</div>
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</div>
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</div>
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</div>
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```
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</div>
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</section>
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## Solution
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<section id='solution'>
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```js
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// solution required
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```
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</section>
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