94 lines
2.3 KiB
Markdown
94 lines
2.3 KiB
Markdown
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---
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id: bad87fee1348bd9aec908853
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title: 給 Bootstrap 元素添加 id 屬性
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challengeType: 0
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forumTopicId: 16639
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dashedName: add-id-attributes-to-bootstrap-elements
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---
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# --description--
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回憶一下，除了可以給元素添加 class 屬性，我們還可以給元素設置 `id` 屬性。
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每個元素的 id 都必須是唯一的，並且在一個頁面中只能使用一次。
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讓我們爲每個 class 爲 `well` 的 `div` 元素添加一個唯一的 id。
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記住，可以這樣給一個元素設置 id：
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```html
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<div class="well" id="center-well">
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```
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給左邊的塊設置 id 爲 `left-well`。 給右邊的塊設置 id 爲 `right-well`。
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# --hints--
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左邊的 `well` 的 id 應爲 `left-well`。
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```js
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assert(
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$('.col-xs-6').children('#left-well') &&
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$('.col-xs-6').children('#left-well').length > 0
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);
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```
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右邊的 `well` 的 id 應爲 `right-well`。
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```js
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assert(
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$('.col-xs-6').children('#right-well') &&
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$('.col-xs-6').children('#right-well').length > 0
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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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<div class="container-fluid">
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<h3 class="text-primary text-center">jQuery Playground</h3>
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<div class="row">
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<div class="col-xs-6">
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<div class="well">
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<button class="btn btn-default target"></button>
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<button class="btn btn-default target"></button>
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<button class="btn btn-default target"></button>
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</div>
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</div>
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<div class="col-xs-6">
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<div class="well">
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<button class="btn btn-default target"></button>
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<button class="btn btn-default target"></button>
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<button class="btn btn-default target"></button>
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</div>
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</div>
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</div>
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</div>
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```
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# --solutions--
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```html
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<div class="container-fluid">
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<h3 class="text-primary text-center">jQuery Playground</h3>
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<div class="row">
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<div class="col-xs-6">
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<div class="well" id="left-well">
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<button class="btn btn-default target"></button>
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<button class="btn btn-default target"></button>
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<button class="btn btn-default target"></button>
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</div>
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</div>
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<div class="col-xs-6">
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<div class="well" id="right-well">
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<button class="btn btn-default target"></button>
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<button class="btn btn-default target"></button>
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<button class="btn btn-default target"></button>
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</div>
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</div>
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</div>
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</div>
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```
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