freeCodeCamp/curriculum/challenges/chinese-traditional/03-front-end-development-libraries/bootstrap/create-a-class-to-target-with-jquery-selectors.md

id	title	challengeType	forumTopicId	dashedName
bad87fee1348bd9aec908852	用 jQuery 選擇器給目標元素的添加 class	0	16815	create-a-class-to-target-with-jquery-selectors

--description--

並不是所有 class 屬性都需要有對應的 CSS 樣式。 有時候我們設置 class 只是爲了更方便地在 jQuery 中選中這些元素。

爲每一個 button 元素添加 target class。

--hints--

每一個 button 元素都應該設置 target class

assert($('.target').length > 5);

--seed--

--seed-contents--

<div class="container-fluid">
  <h3 class="text-primary text-center">jQuery Playground</h3>
  <div class="row">
    <div class="col-xs-6">
      <div class="well">
        <button class="btn btn-default"></button>
        <button class="btn btn-default"></button>
        <button class="btn btn-default"></button>
      </div>
    </div>
    <div class="col-xs-6">
      <div class="well">
        <button class="btn btn-default"></button>
        <button class="btn btn-default"></button>
        <button class="btn btn-default"></button>
      </div>
    </div>
  </div>
</div>

--solutions--

<div class="container-fluid">
  <h3 class="text-primary text-center">jQuery Playground</h3>
  <div class="row">
    <div class="col-xs-6">
      <div class="well">
        <button class="target btn btn-default"></button>
        <button class="target btn btn-default"></button>
        <button class="target btn btn-default"></button>
      </div>
    </div>
    <div class="col-xs-6">
      <div class="well">
        <button class="target btn btn-default"></button>
        <button class="target btn btn-default"></button>
        <button class="target btn btn-default"></button>
      </div>
    </div>
  </div>
</div>