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

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id title challengeType videoUrl localeTitle
bad87fee1348bd9aed208826 Target the Children of an Element Using jQuery 6 使用jQuery定位元素的子元素

Description

当HTML元素放在另一个下面时它们被称为该元素的children元素。例如在与文本“Target1时”TARGET2”和“target3”这一挑战的按钮元件都是children的的<div class="well" id="left-well">元素。 jQuery有一个名为children()的函数,允许您访问您选择的元素的子元素。下面是一个示例,说明如何使用children()函数为left-well元素的子项设置blue $("#left-well").children().css("color", "blue")

Instructions

给你的right-well元素的所有孩子颜色为橙色。

Tests

tests:
  - text: '<code>#right-well</code>所有孩子都应该有橙色文字。'
    testString: 'assert($("#right-well").children().css("color") === "rgb(255, 165, 0)", "All children of <code>#right-well</code> should have orange text.");'
  - text: 您应该使用<code>children()</code>函数来修改这些元素。
    testString: 'assert(code.match(/\.children\(\)\.css/g), "You should use the <code>children&#40&#41</code> function to modify these elements.");'
  - text: 只使用jQuery将这些类添加到元素中。
    testString: 'assert(code.match(/<div class="well" id="right-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");
    $("#target1").parent().css("background-color", "red");

  });
</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