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challengeType

forumTopicId

title

bad87fee1348bd9aeda08826

link
https://cdnjs.cloudflare.com/ajax/libs/animate.css/3.2.0/animate.css

18317

使用 jQuery 配合 id 选择器选择元素

Description

你也能通过 id 属性选取标签。首先，用$("#target3")选择器选取 id 为target3的button标签。注意，和 CSS 属性一样，在 id 名前需要添加#。然后，用 jQuery 的.addClass()方法添加animated和fadeOut类。下面的代码的效果是使 id 为target6的button标签淡出： $("#target6").addClass("animated fadeOut").

Instructions

Tests

tests:
  - text: 用 jQuery 的<code>addClass&#40&#41</code>方法给<code>id</code>为<code>target3</code>的<code>button</code>标签添加<code>animated</code>类。
    testString: assert($("#target3").hasClass("animated"));
  - text: 用 jQuery 的<code>addClass&#40&#41</code>方法给<code>id</code>为<code>target3</code>的标签的类添加<code>fadeOut</code>类。
    testString: assert(($("#target3").hasClass("fadeOut") || $("#target3").hasClass("fadeout"))  && code.match(/\$\(\s*.#target3.\s*\)/g));
  - text: 仅用 jQuery 给标签设置类。
    testString: assert(!code.match(/class.*animated/g));

Challenge Seed

<script>
  $(document).ready(function() {
    $("button").addClass("animated bounce");
    $(".well").addClass("animated shake");

  });
</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() {
    $("button").addClass("animated bounce");
    $(".well").addClass("animated shake");
    $("#target3").addClass("animated fadeOut");
  });
</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>

3.7 KiB Raw Blame History