---
id: bad87fee1348bd9aedc08845
title: 将字体图标添加到所有的按钮上
challengeType: 0
forumTopicId: 16637
required:
  - 
    link: 'https://use.fontawesome.com/releases/v5.8.1/css/all.css'
    raw: true
dashedName: add-font-awesome-icons-to-all-of-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 元素的字号。

# --instructions--

为 info 按钮添加 Font Awesome `info-circle` 图标，delete 按钮添加 `trash` 图标。

**注意：** 下述要求中的 `i` 元素也可以用 `span` 元素代替。

# --hints--

应在 `info` 按钮元素中添加一个 `<i class="fas fa-info-circle"></i>`。

```js
assert(
  $('.btn-info > i').is('.fas.fa-info-circle') ||
    $('.btn-info > span').is('.fas.fa-info-circle')
);
```

应在 `delete` 按钮元素中添加一个 `<i class="fas fa-trash"></i>`。

```js
assert(
  $('.btn-danger > i').is('.fas.fa-trash') ||
    $('.btn-danger > span').is('.fas.fa-trash')
);
```

每个 `i` 元素都应有一个闭合标签，`<i class="fas fa-thumbs-up"></i>` 在 `like` 标签元素中。

```js
assert(
  code.match(/<\/i>|<\/span/g) &&
    code.match(/<\/i|<\/span>/g).length > 2 &&
    ($('.btn-primary > i').is('.fas.fa-thumbs-up') ||
      $('.btn-primary > span').is('.fas.fa-thumbs-up'))
);
```

# --seed--

## --seed-contents--

```html
<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="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>
```

# --solutions--

```html
<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="fas fa-thumbs-up"></i> Like</button>
    </div>
    <div class="col-xs-4">
      <button class="btn btn-block btn-info"><i class="fas fa-info-circle"></i> Info</button>
    </div>
    <div class="col-xs-4">
      <button class="btn btn-block btn-danger"><i class="fas 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">
    <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>
```