freeCodeCamp/curriculum/challenges/chinese/03-front-end-development-libraries/bootstrap/responsively-style-checkboxes.md

id, title, challengeType, forumTopicId, required, dashedName

id	title	challengeType	forumTopicId	required	dashedName
bad87fee1348bd9aeda08845	响应式风格的复选框	0	18269	link raw https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.2.0/css/font-awesome.css true	responsively-style-checkboxes

--description--

Bootstrap 的 col-xs-* 可应用于所有的 form 元素上，包括复选框！ 这样就可以不必关注屏幕大小，均匀地把复选框放在页面上了。

--instructions--

将所有三个复选框都放置于一个 <div class="row"> 元素中。 然后分别把每个复选框都放置于一个 <div class="col-xs-4"> 元素中。

--hints--

将所有的复选框嵌入一个含有 row class 的 div 元素中。

assert($('div.row:has(input[type="checkbox"])').length > 0);

每一个复选框应该嵌套于单独的具有 col-xs-4 class 的 div 元素中。

assert($('div.col-xs-4:has(input[type="checkbox"])').length > 2);

确保所有 div 元素都有一个闭合标签。

assert(
  code.match(/<\/div>/g) &&
    code.match(/<div/g) &&
    code.match(/<\/div>/g).length === code.match(/<div/g).length
);

--seed--

--seed-contents--

<link href="https://fonts.googleapis.com/css?family=Lobster" rel="stylesheet" type="text/css">
<style>
  h2 {
    font-family: Lobster, Monospace;
  }

  .thick-green-border {
    border-color: green;
    border-width: 10px;
    border-style: solid;
    border-radius: 50%;
  }

</style>

<div class="container-fluid">
  <div class="row">
    <div class="col-xs-8">
      <h2 class="text-primary text-center">CatPhotoApp</h2>
    </div>
    <div class="col-xs-4">
      <a href="#"><img class="img-responsive thick-green-border" src="https://cdn.freecodecamp.org/curriculum/cat-photo-app/relaxing-cat.jpg" alt="A cute orange cat lying on its back."></a>
    </div>
  </div>
  <img src="https://cdn.freecodecamp.org/curriculum/cat-photo-app/running-cats.jpg" class="img-responsive" alt="Three kittens running towards the camera.">
  <div class="row">
    <div class="col-xs-4">
      <button class="btn btn-block btn-primary"><i class="fa fa-thumbs-up"></i> Like</button>
    </div>
    <div class="col-xs-4">
      <button class="btn btn-block btn-info"><i class="fa fa-info-circle"></i> Info</button>
    </div>
    <div class="col-xs-4">
      <button class="btn btn-block btn-danger"><i class="fa fa-trash"></i> Delete</button>
    </div>
  </div>
  <p>Things cats <span class="text-danger">love:</span></p>
  <ul>
    <li>cat nip</li>
    <li>laser pointers</li>
    <li>lasagna</li>
  </ul>
  <p>Top 3 things cats hate:</p>
  <ol>
    <li>flea treatment</li>
    <li>thunder</li>
    <li>other cats</li>
  </ol>
  <form action="https://freecatphotoapp.com/submit-cat-photo">
    <div class="row">
      <div class="col-xs-6">
        <label><input type="radio" name="indoor-outdoor"> Indoor</label>
      </div>
      <div class="col-xs-6">
        <label><input type="radio" name="indoor-outdoor"> Outdoor</label>
      </div>
    </div>
    <label><input type="checkbox" name="personality"> Loving</label>
    <label><input type="checkbox" name="personality"> Lazy</label>
    <label><input type="checkbox" name="personality"> Crazy</label>
    <input type="text" placeholder="cat photo URL" required>
    <button type="submit">Submit</button>
  </form>
</div>

--solutions--

<link href="https://fonts.googleapis.com/css?family=Lobster" rel="stylesheet" type="text/css">
<style>
  h2 {
    font-family: Lobster, Monospace;
  }

  .thick-green-border {
    border-color: green;
    border-width: 10px;
    border-style: solid;
    border-radius: 50%;
  }

</style>

<div class="container-fluid">
  <div class="row">
    <div class="col-xs-8">
      <h2 class="text-primary text-center">CatPhotoApp</h2>
    </div>
    <div class="col-xs-4">
      <a href="#"><img class="img-responsive thick-green-border" src="https://cdn.freecodecamp.org/curriculum/cat-photo-app/relaxing-cat.jpg" alt="A cute orange cat lying on its back."></a>
    </div>
  </div>
  <img src="https://cdn.freecodecamp.org/curriculum/cat-photo-app/running-cats.jpg" class="img-responsive" alt="Three kittens running towards the camera.">
  <div class="row">
    <div class="col-xs-4">
      <button class="btn btn-block btn-primary"><i class="fa fa-thumbs-up"></i> Like</button>
    </div>
    <div class="col-xs-4">
      <button class="btn btn-block btn-info"><i class="fa fa-info-circle"></i> Info</button>
    </div>
    <div class="col-xs-4">
      <button class="btn btn-block btn-danger"><i class="fa fa-trash"></i> Delete</button>
    </div>
  </div>
  <p>Things cats <span class="text-danger">love:</span></p>
  <ul>
    <li>cat nip</li>
    <li>laser pointers</li>
    <li>lasagna</li>
  </ul>
  <p>Top 3 things cats hate:</p>
  <ol>
    <li>flea treatment</li>
    <li>thunder</li>
    <li>other cats</li>
  </ol>
  <form action="https://freecatphotoapp.com/submit-cat-photo">
    <div class="row">
      <div class="col-xs-6">
        <label><input type="radio" name="indoor-outdoor"> Indoor</label>
      </div>
      <div class="col-xs-6">
        <label><input type="radio" name="indoor-outdoor"> Outdoor</label>
      </div>
    </div>
    <div class="row">
      <div class="col-xs-4">
        <label><input type="checkbox" name="personality"> Loving</label>   
      </div>
      <div class="col-xs-4">
         <label><input type="checkbox" name="personality"> Lazy</label>
      </div>
      <div class="col-xs-4">
         <label><input type="checkbox" name="personality"> Crazy</label>
      </div>
    </div>
    <input type="text" placeholder="cat photo URL" required>
    <button type="submit">Submit</button>
  </form>
</div>