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title

challengeType

forumTopicId

required

dashedName

bad87fee1348bd9aedd08845

在按钮中添加字体图标

16638

link	raw
https://use.fontawesome.com/releases/v5.8.1/css/all.css	true

add-font-awesome-icons-to-our-buttons

--description--

Font Awesome 是一个非常便利的图标库。这些图标可以是网络字体，也可以是一张矢量图。这些图标就和字体一样，不仅能通过像素单位指定它们的大小，它们也同样会继承父级 HTML 元素的字体大小。

可以将 Font Awesome 图标库添加至任何一个 web app 中，方法很简单，只需要在 HTML 头部增加下列代码即可：

<link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.8.1/css/all.css" integrity="sha384-50oBUHEmvpQ+1lW4y57PTFmhCaXp0ML5d60M1M7uH2+nqUivzIebhndOJK28anvf" crossorigin="anonymous">

不过在这里，已经预先为此页面添加了上述代码。

i 元素起初用于让其它元素具有斜体（italic）的效果，不过现在一般用于显示图标。可以把 Font Awesome 中的 class 属性添加到 i 元素中，让它变成一个图标，比如：

<i class="fas fa-info-circle"></i>

注意用 span 元素展示图标也是可以的。

--instructions--

给 like 按钮添加一个 Font Awesome thumbs-up 图标，具体方法是给 i 元素添加 fas 和 fa-thumbs-up class 属性。确保将 Like 文本放在图标旁边。

--hints--

增加一个 class 为 fas 和 fa-thumbs-up 的 i 元素。

assert($('i').is('.fas.fa-thumbs-up') || $('span').is('.fas.fa-thumbs-up'));

fa-thumbs-up 图标应该在 Like 按钮中。

assert(
  ($('i.fa-thumbs-up').parent().text().match(/Like/gi) &&
    $('.btn-primary > i').is('.fas.fa-thumbs-up')) ||
    ($('span.fa-thumbs-up').parent().text().match(/Like/gi) &&
      $('.btn-primary > span').is('.fas.fa-thumbs-up'))
);

i 元素应该在 button 元素中。

assert(
  $('button').children('i').length > 0 ||
    $('button').children('span').length > 0
);

确保图标元素有一个闭合标签。

assert(code.match(/<\/i>|<\/span>/g));

--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://bit.ly/fcc-relaxing-cat" alt="A cute orange cat lying on its back."></a>
    </div>
  </div>
  <img src="https://bit.ly/fcc-running-cats" 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">Like</button>
    </div>
    <div class="col-xs-4">
      <button class="btn btn-block btn-info">Info</button>
    </div>
    <div class="col-xs-4">
      <button class="btn btn-block btn-danger">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">
    <label><input type="radio" name="indoor-outdoor"> Indoor</label>
    <label><input type="radio" name="indoor-outdoor"> Outdoor</label>
    <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://bit.ly/fcc-relaxing-cat" alt="A cute orange cat lying on its back."></a>
    </div>
  </div>
  <img src="https://bit.ly/fcc-running-cats" 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="fas fa-thumbs-up"></i> Like</button>
    </div>
    <div class="col-xs-4">
      <button class="btn btn-block btn-info">Info</button>
    </div>
    <div class="col-xs-4">
      <button class="btn btn-block btn-danger">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">
    <label><input type="radio" name="indoor-outdoor"> Indoor</label>
    <label><input type="radio" name="indoor-outdoor"> Outdoor</label>
    <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>

5.9 KiB Raw Blame History Unescape Escape