122 lines
3.3 KiB
Markdown
122 lines
3.3 KiB
Markdown
---
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id: bad87fee1348bd9aed508826
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title: 使用 jQuery 克隆元素
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challengeType: 6
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forumTopicId: 16780
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dashedName: clone-an-element-using-jquery
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---
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# --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 `clone()` 方法，可以复制标签。
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例如，如果想把 `target2` 从 `left-well` 复制到 `right-well`，可以设置如下：
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```js
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$("#target2").clone().appendTo("#right-well");
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```
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是否注意到这两个 jQuery 函数连在一起了？ 这被称为<dfn>链式调用（function chaining）</dfn>，是一种用 jQuery 实现效果的简便方法。
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克隆 `target5` 元素，并将其附加到 `left-well` 。
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# --hints--
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`target5` 元素应该在 `right-well` 里面。
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```js
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assert($('#right-well').children('#target5').length > 0);
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```
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应该克隆 `target5` 元素，并放在 `left-well` 里面。
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```js
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assert($('#left-well').children('#target5').length > 0);
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```
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应该仅用 jQuery 移动这些元素。
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```js
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assert(!code.match(/class.*animated/g));
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```
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# --seed--
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## --seed-contents--
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```html
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<script>
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$(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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<!-- 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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# --solutions--
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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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