111 lines
3.0 KiB
Markdown
111 lines
3.0 KiB
Markdown
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---
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id: bad87eee1348bd9aede07836
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title: Set the id of an Element
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challengeType: 0
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videoUrl: ''
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localeTitle: 设置元素的id
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---
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## Description
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<section id="description">除了类之外，每个HTML元素还可以具有<code>id</code>属性。使用<code>id</code>属性有几个好处：您可以使用<code>id</code>来设置单个元素的样式，稍后您将学习如何使用它来使用JavaScript选择和修改特定元素。 <code>id</code>属性应该是唯一的。浏览器不会强制执行此操作，但这是广泛认可的最佳实践。所以请不要给多个元素赋予相同的<code>id</code>属性。这里有一个例子，说明如何为你的<code>h2</code>元素提供<code>cat-photo-app</code> <code><h2 id="cat-photo-app"></code> ： <code><h2 id="cat-photo-app"></code> </section>
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## Instructions
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<section id="instructions">为<code>form</code>元素添加id <code>cat-photo-form</code> 。 </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: 为<code>form</code>元素添加<code>cat-photo-form</code>的id。
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testString: 'assert($("form").attr("id") === "cat-photo-form", "Give your <code>form</code> element the id of <code>cat-photo-form</code>.");'
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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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.silver-background {
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background-color: silver;
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}
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</style>
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<h2 class="red-text">CatPhotoApp</h2>
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<main>
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<p class="red-text">Click here to view more <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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<div class="silver-background">
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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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</div>
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<form action="/submit-cat-photo">
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<label><input type="radio" name="indoor-outdoor" checked> Indoor</label>
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<label><input type="radio" name="indoor-outdoor"> Outdoor</label><br>
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<label><input type="checkbox" name="personality" checked> Loving</label>
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<label><input type="checkbox" name="personality"> Lazy</label>
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<label><input type="checkbox" name="personality"> Energetic</label><br>
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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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</main>
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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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```js
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// solution required
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```
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</section>
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