2018-10-10 22:03:03 +00:00
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---
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id: bad88fee1348ce8acef08815
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2020-12-16 07:37:30 +00:00
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title: 使用 Bootstrap 网格并排放置元素
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2018-10-10 22:03:03 +00:00
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challengeType: 0
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2020-09-07 08:17:39 +00:00
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forumTopicId: 18371
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2021-01-13 02:31:00 +00:00
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dashedName: use-the-bootstrap-grid-to-put-elements-side-by-side
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2018-10-10 22:03:03 +00:00
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---
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2020-12-16 07:37:30 +00:00
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# --description--
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Bootstrap 具有一套基于 12 列的响应式栅格系统————可以轻松实现将多个元素放入一行并指定它们的相对宽度。 Bootstrap 的大部分 class 属性都可以应用在 `div` 元素上。
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2020-09-07 08:17:39 +00:00
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Bootstrap 的列宽度属性取决于用户的屏幕宽度。 比如,手机有着窄屏幕而笔记本电脑有者更大的屏幕.
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2018-10-10 22:03:03 +00:00
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2020-12-16 07:37:30 +00:00
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就拿 Bootstrap 的 `col-md-*` class 来说。 在这里, `md` 表示 medium (中等的), 而 `*` 是一个数字,说明了这个元素占有多少个列宽度。这个例子就是指定了中等大小屏幕(例如笔记本电脑)下元素所占的列宽度。
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在我们创建的 Cat Photo App 中,我们将使用 `col-xs-*` , 其中 `xs` 是 extra small 的缩写 (应用于较小的屏幕,比如手机屏幕), `*` 是你填写的数字,代表一行中,你的元素该占多少列宽。
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将我们的 `Like`, `Info` 和 `Delete` 三个按钮并排放入一个 `<div class="row">` 元素中,然后每个按钮都各用一个 `<div class="col-xs-4">` 元素包裹起来。
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当 `div` 元素设置了 `row` class 之后,那几个按钮便会嵌入其中了。
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# --hints--
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所有按钮都需要嵌入到同一个 `div` 元素中, 并且该元素包含 class 属性 `row`。
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```js
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assert($('div.row:has(button)').length > 0);
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```
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每个 Bootstrap 按钮都需要嵌入各自的 `div` 元素,并且该元素包含 class 属性 `col-xs-4`。
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```js
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assert($('div.col-xs-4:has(button)').length > 2);
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2018-10-10 22:03:03 +00:00
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```
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2020-12-16 07:37:30 +00:00
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确保每一个 `button` 元素都有一个闭合标签。
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```js
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assert(
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code.match(/<\/button>/g) &&
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code.match(/<button/g) &&
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code.match(/<\/button>/g).length === code.match(/<button/g).length
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);
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2018-10-10 22:03:03 +00:00
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```
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2020-12-16 07:37:30 +00:00
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确保每一个 `div` 元素都有一个闭合标签。
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```js
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assert(
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code.match(/<\/div>/g) &&
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code.match(/<div/g) &&
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code.match(/<\/div>/g).length === code.match(/<div/g).length
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);
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2018-10-10 22:03:03 +00:00
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```
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2020-08-13 15:24:35 +00:00
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2021-01-13 02:31:00 +00:00
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# --seed--
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## --seed-contents--
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```html
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<link href="https://fonts.googleapis.com/css?family=Lobster" rel="stylesheet" type="text/css">
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<style>
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.red-text {
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color: red;
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}
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h2 {
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font-family: Lobster, Monospace;
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}
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p {
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font-size: 16px;
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font-family: Monospace;
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}
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.thick-green-border {
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border-color: green;
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border-width: 10px;
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border-style: solid;
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border-radius: 50%;
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}
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.smaller-image {
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width: 100px;
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}
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</style>
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<div class="container-fluid">
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<h2 class="red-text text-center">CatPhotoApp</h2>
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<p>Click here for <a href="#">cat photos</a>.</p>
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<a href="#"><img class="smaller-image thick-green-border" src="https://bit.ly/fcc-relaxing-cat" alt="A cute orange cat lying on its back."></a>
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<img src="https://bit.ly/fcc-running-cats" class="img-responsive" alt="Three kittens running towards the camera.">
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<button class="btn btn-block btn-primary">Like</button>
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<button class="btn btn-block btn-info">Info</button>
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<button class="btn btn-block btn-danger">Delete</button>
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<p>Things cats love:</p>
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<ul>
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<li>cat nip</li>
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<li>laser pointers</li>
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<li>lasagna</li>
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</ul>
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<p>Top 3 things cats hate:</p>
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<ol>
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<li>flea treatment</li>
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<li>thunder</li>
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<li>other cats</li>
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</ol>
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<form action="https://freecatphotoapp.com/submit-cat-photo">
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<label><input type="radio" name="indoor-outdoor"> Indoor</label>
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<label><input type="radio" name="indoor-outdoor"> Outdoor</label>
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<label><input type="checkbox" name="personality"> Loving</label>
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<label><input type="checkbox" name="personality"> Lazy</label>
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<label><input type="checkbox" name="personality"> Crazy</label>
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<input type="text" placeholder="cat photo URL" required>
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<button type="submit">Submit</button>
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</form>
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</div>
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```
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2020-12-16 07:37:30 +00:00
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# --solutions--
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2021-01-13 02:31:00 +00:00
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```html
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<link href="https://fonts.googleapis.com/css?family=Lobster" rel="stylesheet" type="text/css">
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<style>
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.red-text {
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color: red;
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}
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h2 {
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font-family: Lobster, Monospace;
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}
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p {
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font-size: 16px;
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font-family: Monospace;
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}
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.thick-green-border {
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border-color: green;
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border-width: 10px;
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border-style: solid;
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border-radius: 50%;
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}
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.smaller-image {
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width: 100px;
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}
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</style>
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<div class="container-fluid">
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<h2 class="red-text text-center">CatPhotoApp</h2>
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<p>Click here for <a href="#">cat photos</a>.</p>
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<a href="#"><img class="smaller-image thick-green-border" src="https://bit.ly/fcc-relaxing-cat" alt="A cute orange cat lying on its back."></a>
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<img src="https://bit.ly/fcc-running-cats" class="img-responsive" alt="Three kittens running towards the camera.">
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<div class="row">
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<div class="col-xs-4">
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<button class="btn btn-block btn-primary">Like</button>
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</div>
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<div class="col-xs-4">
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<button class="btn btn-block btn-info">Info</button>
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</div>
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<div class="col-xs-4">
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<button class="btn btn-block btn-danger">Delete</button>
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</div>
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</div>
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<p>Things cats love:</p>
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<ul>
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<li>cat nip</li>
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<li>laser pointers</li>
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<li>lasagna</li>
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</ul>
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<p>Top 3 things cats hate:</p>
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<ol>
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<li>flea treatment</li>
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<li>thunder</li>
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<li>other cats</li>
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</ol>
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<form action="https://freecatphotoapp.com/submit-cat-photo">
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<label><input type="radio" name="indoor-outdoor"> Indoor</label>
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<label><input type="radio" name="indoor-outdoor"> Outdoor</label>
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<label><input type="checkbox" name="personality"> Loving</label>
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<label><input type="checkbox" name="personality"> Lazy</label>
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<label><input type="checkbox" name="personality"> Crazy</label>
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<input type="text" placeholder="cat photo URL" required>
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<button type="submit">Submit</button>
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</form>
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</div>
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```
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