freeCodeCamp/curriculum/challenges/chinese/03-front-end-libraries/jquery/target-elements-by-class-us...

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id title required challengeType videoUrl localeTitle
bad87fee1348bd9aedc08826 Target Elements by Class Using jQuery
link
https://cdnjs.cloudflare.com/ajax/libs/animate.css/3.2.0/animate.css
6 使用jQuery按类目标元素

Description

您看到我们如何使所有button元素反弹?我们用$("button")选择它们,然后我们用.addClass("animated bounce");为它们添加了一些CSS类.addClass("animated bounce"); 。您刚刚使用了jQuery的.addClass()函数,它允许您向元素添加类。首先,让我们使用$(".well")选择器将你的div元素与类well对准。请注意就像CSS声明一样您键入一个.在课堂名称之前。然后使用jQuery的.addClass()函数中添加类animatedshake 。例如,您可以通过将以下内容添加到document ready function来创建具有类text-primary shake的所有元素 $(".text-primary").addClass("animated shake");

Instructions

Tests

tests:
  - 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。
    testString: 'assert($(".well").hasClass("animated") && $(".well").hasClass("shake"), "Use the jQuery <code>addClass&#40&#41</code> function to give the classes <code>animated</code> and <code>shake</code> to all your elements with the class <code>well</code>.");'
  - text: 只使用jQuery将这些类添加到元素中。
    testString: 'assert(!code.match(/class\.\*animated/g), "Only use jQuery to add these classes to the element.");'

Challenge Seed

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

Solution

// solution required