freeCodeCamp/curriculum/challenges/chinese/03-front-end-libraries/jquery/target-the-parent-of-an-ele...

3.5 KiB

id title challengeType videoUrl localeTitle
bad87fee1348bd9aed308826 Target the Parent of an Element Using jQuery 6 使用jQuery定位元素的父级

Description

每个HTML元素都有一个parent元素,它从中inherits属性。例如,您的jQuery Playground h3元素具有<div class="container-fluid">的父元素,它本身具有父body 。 jQuery有一个名为parent()的函数,允许您访问您选择的任何元素的父级。下面是一个如何使用parent()函数的例子,如果你想给left-well元素的父元素一个蓝色的背景颜色: $("#left-well").parent().css("background-color", "blue")#target1元素的父级#target1背景颜色为红色。

Instructions

Tests

tests:
  - text: 你的<code>left-well</code>元素应该有红色背景。
    testString: 'assert($("#left-well").css("background-color") === "red" || $("#left-well").css("background-color") === "rgb(255, 0, 0)" || $("#left-well").css("background-color").toLowerCase() === "#ff0000" || $("#left-well").css("background-color").toLowerCase() === "#f00", "Your <code>left-well</code> element should have a red background.");'
  - text: 您应该使用<code>.parent()</code>函数来修改此元素。
    testString: 'assert(code.match(/\.parent\s*\(\s*\)\s*\.css/g), "You should use the <code>&#46;parent&#40;&#41;</code> function to modify this element.");'
  - text: '应该在<code>#target1</code>元素上调用<code>.parent()</code>方法。'
    testString: 'assert(code.match(/\$\s*?\(\s*?(?:"|")\s*?#target1\s*?(?:"|")\s*?\)\s*?\.parent/gi), "The <code>&#46;parent&#40;&#41;</code> method should be called on the <code>&#35;target1</code> element.");'
  - text: 只使用jQuery将这些类添加到元素中。
    testString: 'assert(code.match(/<div class="well" id="left-well">/g), "Only use jQuery to add these classes to the element.");'

Challenge Seed

<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. -->

<body>
  <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>
</body>

Solution

// solution required