191 lines
6.1 KiB
Markdown
191 lines
6.1 KiB
Markdown
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---
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id: bad88fee1348ce8acef08815
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challengeType: 0
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forumTopicId: 18371
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localeTitle: 使用 Bootstrap 网格并排放置元素
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---
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## Description
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<section id='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 <code>div</code> 元素上。
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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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就拿 Bootstrap 的 <code>col-md-*</code> class 来说。 在这里, <code>md</code> 表示 medium (中等的), 而 <code>*</code> 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 <code>col-xs-*</code> , 其中 <code>xs</code> 是 extra small 的缩写 (应用于较小的屏幕,比如手机屏幕), <code>*</code> 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 <code>Like</code>, <code>Info</code> 和 <code>Delete</code> 三个按钮并排放入一个 <code><div class="row"></code> 元素中,然后每个按钮都各用一个 <code><div class="col-xs-4"></code> 元素包裹起来。
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当 <code>div</code> 元素设置了 <code>row</code> class 之后,那几个按钮便会嵌入其中了。
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</section>
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## Instructions
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<section id='instructions'>
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</section>
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## Tests
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<section id='tests'>
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```yml
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tests:
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- text: 所有按钮都需要嵌入到同一个 <code>div</code> 元素中, 并且该元素包含 class 属性 <code>row</code>。
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testString: assert($("div.row:has(button)").length > 0);
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- text: 每个 Bootstrap 按钮都需要嵌入各自的 <code>div</code> 元素,并且该元素包含 class 属性 <code>col-xs-4</code>。
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testString: assert($("div.col-xs-4:has(button)").length > 2);
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- text: 确保每一个 <code>button</code> 元素都有一个闭合标签。
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testString: assert(code.match(/<\/button>/g) && code.match(/<button/g) && code.match(/<\/button>/g).length === code.match(/<button/g).length);
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- text: 确保每一个 <code>div</code> 元素都有一个闭合标签。
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testString: assert(code.match(/<\/div>/g) && code.match(/<div/g) && code.match(/<\/div>/g).length === code.match(/<div/g).length);
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```
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</section>
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## Challenge Seed
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<section id='challengeSeed'>
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<div id='html-seed'>
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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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</div>
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</section>
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## Solution
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<section id='solution'>
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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="/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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</section>
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