3.0 KiB
3.0 KiB
id | title | challengeType | videoUrl | localeTitle |
---|---|---|---|---|
bad87eee1348bd9aede07836 | Set the id of an Element | 0 | 设置元素的id |
Description
id
属性。使用id
属性有几个好处:您可以使用id
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。 id
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id
属性。这里有一个例子,说明如何为你的h2
元素提供cat-photo-app
<h2 id="cat-photo-app">
: <h2 id="cat-photo-app">
Instructions
form
元素添加id cat-photo-form
。 Tests
tests:
- text: 为<code>form</code>元素添加<code>cat-photo-form</code>的id。
testString: 'assert($("form").attr("id") === "cat-photo-form", "Give your <code>form</code> element the id of <code>cat-photo-form</code>.");'
Challenge Seed
<link href="https://fonts.googleapis.com/css?family=Lobster" rel="stylesheet" type="text/css">
<style>
.red-text {
color: red;
}
h2 {
font-family: Lobster, monospace;
}
p {
font-size: 16px;
font-family: monospace;
}
.thick-green-border {
border-color: green;
border-width: 10px;
border-style: solid;
border-radius: 50%;
}
.smaller-image {
width: 100px;
}
.silver-background {
background-color: silver;
}
</style>
<h2 class="red-text">CatPhotoApp</h2>
<main>
<p class="red-text">Click here to view more <a href="#">cat photos</a>.</p>
<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>
<div class="silver-background">
<p>Things cats love:</p>
<ul>
<li>cat nip</li>
<li>laser pointers</li>
<li>lasagna</li>
</ul>
<p>Top 3 things cats hate:</p>
<ol>
<li>flea treatment</li>
<li>thunder</li>
<li>other cats</li>
</ol>
</div>
<form action="/submit-cat-photo">
<label><input type="radio" name="indoor-outdoor" checked> Indoor</label>
<label><input type="radio" name="indoor-outdoor"> Outdoor</label><br>
<label><input type="checkbox" name="personality" checked> Loving</label>
<label><input type="checkbox" name="personality"> Lazy</label>
<label><input type="checkbox" name="personality"> Energetic</label><br>
<input type="text" placeholder="cat photo URL" required>
<button type="submit">Submit</button>
</form>
</main>
Solution
// solution required