127 lines
3.6 KiB
Markdown
127 lines
3.6 KiB
Markdown
---
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id: bad87fee1348bd9aed508826
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title: Clone an Element Using jQuery
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challengeType: 6
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forumTopicId: 16780
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localeTitle: 使用 jQuery 克隆元素
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---
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## Description
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<section id='description'>
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除了移动标签，也可以把元素从一个地方复制到另一地方。
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jQuery 有一个<code>clone()</code>方法，可以复制标签。
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例如，如果想把<code>target2</code>从<code>left-well</code>复制到<code>right-well</code>，可以设置如下：
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<code>$("#target2").clone().appendTo("#right-well");</code>
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你是否注意到这两个 jQuery 方法连在一起了吗？这被称为<code>链式调用（function chaining）</code>，是一种用 jQuery 实现效果的简便方法。
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克隆<code>target5</code>标签并附加到<code>left-well</code>。
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</section>
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## Instructions
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<section id='instructions'>
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</section>
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## Tests
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<section id='tests'>
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```yml
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tests:
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- text: <code>target5</code>标签应该在<code>right-well</code>内。
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testString: assert($("#right-well").children("#target5").length > 0);
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- text: 克隆<code>target5</code>标签并放在<code>left-well</code>内。
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testString: assert($("#left-well").children("#target5").length > 0);
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- text: 仅用 jQuery 移动这些标签。
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testString: assert(!code.match(/class.*animated/g));
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```
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</section>
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## Challenge Seed
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<section id='challengeSeed'>
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<div id='html-seed'>
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```html
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<script>
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$(document).ready(function() {
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$("#target1").css("color", "red");
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$("#target1").prop("disabled", true);
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$("#target4").remove();
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$("#target2").appendTo("#right-well");
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});
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</script>
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<!-- 请修改本行以上的代码 -->
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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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```html
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<script>
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$(document).ready(function() {
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$("#target1").css("color", "red");
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$("#target1").prop("disabled", true);
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$("#target4").remove();
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$("#target2").appendTo("#right-well");
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$("#target5").clone().appendTo("#left-well");
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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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</section>
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