197 lines
5.6 KiB
Markdown
197 lines
5.6 KiB
Markdown
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---
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id: bad88fee1348ce8acef08815
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title: 使用 Bootstrap Grid 並排放置元素
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challengeType: 0
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forumTopicId: 18371
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dashedName: use-the-bootstrap-grid-to-put-elements-side-by-side
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---
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# --description--
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Bootstrap 具有一套 12 列的響應式柵格系統,可以輕鬆的將多個元素放入一行並指定它們的相對寬度。 Bootstrap 的大部分 class 屬性都可以應用在 `div` 元素上。
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Bootstrap 的列寬取決於用戶的屏幕寬度。 比如,手機有着窄屏幕而筆記本電腦有者更大的屏幕.
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就拿 Bootstrap 的 `col-md-*` class 來說。 在這裏, `md` 表示 medium (中等的), 而 `*` 是一個數字,說明了這個元素佔有多少個列寬度。 這個例子就是指定了中等大小屏幕(例如筆記本電腦)下元素所佔的列寬度。
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在 Cat Photo App 中,將使用 `col-xs-*` , 其中 `xs` 是 extra small 的縮寫 (比如窄屏手機屏幕), `*` 是填寫的數字,代表一行中的元素該佔多少列寬。
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將 `Like`,`Info` 和 `Delete` 三個按鈕並排放入一個 `<div class="row">` 元素中,然後每個按鈕都各用一個 `<div class="col-xs-4">` 元素包裹起來。
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當 `div` 元素設置了 `row` class 之後,那幾個按鈕便會嵌入其中了。
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# --hints--
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所有按鈕都需要嵌入到同一個 `div` 元素中, 並且該元素包含 `row` class 屬性。
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```js
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assert($('div.row:has(button)').length > 0);
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```
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每個 Bootstrap 按鈕都需要嵌入各自的 `div` 元素,並且該元素包含 class 屬性 `col-xs-4`。
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```js
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assert($('div.col-xs-4:has(button)').length > 2);
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```
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確保每一個 `button` 元素都有一個閉合標籤。
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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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```
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確保每一個 `div` 元素都有一個閉合標籤。
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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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```
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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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# --solutions--
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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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