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freeCodeCamp/curriculum/challenges/chinese-traditional/03-front-end-libraries/jquery/target-the-children-of-an-element-using-jquery.md
Nicholas Carrigan (he/him) 3da4be21bb chore: seed chinese traditional (#42005)
Seeds the chinese traditional files manually so we can deploy to
staging.
2021-05-05 22:43:49 +05:30

3.7 KiB
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id, title, challengeType, forumTopicId, dashedName
id title challengeType forumTopicId dashedName
bad87fee1348bd9aed208826 使用 jQuery 選擇元素的子元素 6 18320 target-the-children-of-an-element-using-jquery

--description--

把 HTML 標籤放到另一個級別的標籤裏,這些 HTML 標籤被稱爲該標籤的子標籤children element。 例如,本次挑戰中文本爲 #target1#target2#target3 的按鈕都是 <div class="well" id="left-well"> 標籤的子標籤。

jQuery 有一個 children() 方法,可以訪問被選取標籤的子標籤。

下面的代碼展示了用 children() 方法把 left-well 標籤的子標籤的顏色設置成 blue(藍色):

$("#left-well").children().css("color", "blue")

--instructions--

right-well 元素的所有子元素設置爲橙色orange

--hints--

#right-well 的所有子元素應該有橙色文本。

assert($('#right-well').children().css('color') === 'rgb(255, 165, 0)');

應該用 children() 函數修改這些元素。

assert(code.match(/\.children\(\)\.css/g));

應該僅用 jQuery 給標籤添加 class。

assert(code.match(/<div class="well" id="right-well">/g));

--seed--

--seed-contents--

<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>

--solutions--

<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");
    $("#right-well").children().css("color", "orange");
  });
</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>