freeCodeCamp/clone-an-element-using-jquery.md at 41b7a331008a97d20155c3752b3beb530375ab99

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Raw Blame History

id, title, challengeType, forumTopicId, localeTitle

id	title	challengeType	forumTopicId	localeTitle
bad87fee1348bd9aed508826	Clone an Element Using jQuery	6	16780	使用 jQuery 克隆元素

Description

除了移动标签，也可以把元素从一个地方复制到另一地方。 jQuery 有一个clone()方法，可以复制标签。例如，如果想把target2从left-well复制到right-well，可以设置如下： $("#target2").clone().appendTo("#right-well"); 你是否注意到这两个 jQuery 方法连在一起了吗？这被称为链式调用（function chaining），是一种用 jQuery 实现效果的简便方法。克隆target5标签并附加到left-well。

Instructions

Tests

tests:
  - text: <code>target5</code>标签应该在<code>right-well</code>内。
    testString: assert($("#right-well").children("#target5").length > 0);
  - text: 克隆<code>target5</code>标签并放在<code>left-well</code>内。
    testString: assert($("#left-well").children("#target5").length > 0);
  - text: 仅用 jQuery 移动这些标签。
    testString: assert(!code.match(/class.*animated/g));

Challenge Seed

<script>
  $(document).ready(function() {
    $("#target1").css("color", "red");
    $("#target1").prop("disabled", true);
    $("#target4").remove();
    $("#target2").appendTo("#right-well");

  });
</script>

<!-- 请修改本行以上的代码 -->

<div class="container-fluid">
  <h3 class="text-primary text-center">jQuery Playground</h3>
  <div class="row">
    <div class="col-xs-6">
      <h4>#left-well</h4>
      <div class="well" id="left-well">
        <button class="btn btn-default target" id="target1">#target1</button>
        <button class="btn btn-default target" id="target2">#target2</button>
        <button class="btn btn-default target" id="target3">#target3</button>
      </div>
    </div>
    <div class="col-xs-6">
      <h4>#right-well</h4>
      <div class="well" id="right-well">
        <button class="btn btn-default target" id="target4">#target4</button>
        <button class="btn btn-default target" id="target5">#target5</button>
        <button class="btn btn-default target" id="target6">#target6</button>
      </div>
    </div>
  </div>
</div>

Solution

<script>
  $(document).ready(function() {
    $("#target1").css("color", "red");
    $("#target1").prop("disabled", true);
    $("#target4").remove();
    $("#target2").appendTo("#right-well");
    $("#target5").clone().appendTo("#left-well");
  });
</script>

<!-- Only change code above this line. -->

<div class="container-fluid">
  <h3 class="text-primary text-center">jQuery Playground</h3>
  <div class="row">
    <div class="col-xs-6">
      <h4>#left-well</h4>
      <div class="well" id="left-well">
        <button class="btn btn-default target" id="target1">#target1</button>
        <button class="btn btn-default target" id="target2">#target2</button>
        <button class="btn btn-default target" id="target3">#target3</button>
      </div>
    </div>
    <div class="col-xs-6">
      <h4>#right-well</h4>
      <div class="well" id="right-well">
        <button class="btn btn-default target" id="target4">#target4</button>
        <button class="btn btn-default target" id="target5">#target5</button>
        <button class="btn btn-default target" id="target6">#target6</button>
      </div>
    </div>
  </div>
</div>

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