freeCodeCamp/curriculum/challenges/chinese-traditional/01-responsive-web-design/basic-css/add-borders-around-your-elements.md

---
id: bad87fee1348bd9bedf08813
title: 在元素周圍添加邊框
challengeType: 0
videoUrl: 'https://scrimba.com/c/c2MvnHZ'
forumTopicId: 16630
dashedName: add-borders-around-your-elements
---

# --description--

CSS 邊框具有 `style`、`color`、`width` 屬性。

假如我們要將一個 HTML 元素邊框設置爲 5px 的紅色實線邊框，我們可以這樣做：

```html
<style>
  .thin-red-border {
    border-color: red;
    border-width: 5px;
    border-style: solid;
  }
</style>
```

# --instructions--

創建一個名爲 `thick-green-border` 的 class， 該 class 應在 HTML 元素周圍添加一個 10px 的綠色實線邊框。 將這個 class 應用於你的貓圖。

記得在一個元素上可以同時應用多個 `class`，使用空格來分隔不同 class 即可， 例如：

```html
<img class="class1 class2">
```

# --hints--

`img` 元素的 class 應包含 `smaller-image`。

```js
assert($('img').hasClass('smaller-image'));
```

`img` 元素應包含 `thick-green-border` class。

```js
assert($('img').hasClass('thick-green-border'));
```

圖片邊框寬度應設置爲 `10px`。

```js
assert(
  $('img').hasClass('thick-green-border') &&
    parseInt($('img').css('border-top-width'), 10) >= 8 &&
    parseInt($('img').css('border-top-width'), 10) <= 12
);
```

圖片邊框樣式應爲 `solid` 實線。

```js
assert($('img').css('border-right-style') === 'solid');
```

`img` 元素的邊框顏色應爲綠色。

```js
assert($('img').css('border-left-color') === 'rgb(0, 128, 0)');
```

# --seed--

## --seed-contents--

```html
<link href="https://fonts.googleapis.com/css?family=Lobster" rel="stylesheet" type="text/css">
<style>
  .red-text {
    color: red;
  }

  h2 {
    font-family: Lobster, monospace;
  }

  p {
    font-size: 16px;
    font-family: monospace;
  }

  .smaller-image {
    width: 100px;
  }
</style>

<h2 class="red-text">CatPhotoApp</h2>
<main>
  <p class="red-text">Click here to view more <a href="#">cat photos</a>.</p>

  <a href="#"><img class="smaller-image" src="https://cdn.freecodecamp.org/curriculum/cat-photo-app/relaxing-cat.jpg" alt="A cute orange cat lying on its back."></a>

  <div>
    <p>Things cats love:</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>
  </div>

  <form action="https://freecatphotoapp.com/submit-cat-photo">
    <label><input type="radio" name="indoor-outdoor" checked> Indoor</label>
    <label><input type="radio" name="indoor-outdoor"> Outdoor</label><br>
    <label><input type="checkbox" name="personality" checked> Loving</label>
    <label><input type="checkbox" name="personality"> Lazy</label>
    <label><input type="checkbox" name="personality"> Energetic</label><br>
    <input type="text" placeholder="cat photo URL" required>
    <button type="submit">Submit</button>
  </form>
</main>
```

# --solutions--

```html
<link href="https://fonts.googleapis.com/css?family=Lobster" rel="stylesheet" type="text/css">
<style>
  .red-text {
    color: red;
  }

  h2 {
    font-family: Lobster, monospace;
  }

  p {
    font-size: 16px;
    font-family: monospace;
  }

  .smaller-image {
    width: 100px;
  }

  .thick-green-border {
    border-width: 10px;
    border-color: green;
    border-style: solid;
  }
</style>

<h2 class="red-text">CatPhotoApp</h2>
<main>
  <p class="red-text">Click here to view more <a href="#">cat photos</a>.</p>

  <a href="#"><img class="smaller-image 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>
    <p>Things cats love:</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>
  </div>

  <form action="https://freecatphotoapp.com/submit-cat-photo">
    <label><input type="radio" name="indoor-outdoor" checked> Indoor</label>
    <label><input type="radio" name="indoor-outdoor"> Outdoor</label><br>
    <label><input type="checkbox" name="personality" checked> Loving</label>
    <label><input type="checkbox" name="personality"> Lazy</label>
    <label><input type="checkbox" name="personality"> Energetic</label><br>
    <input type="text" placeholder="cat photo URL" required>
    <button type="submit">Submit</button>
  </form>
</main>
```