129 lines
3.5 KiB
Markdown
129 lines
3.5 KiB
Markdown
---
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id: 58c383d33e2e3259241f3076
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title: Use Attribute Selectors to Style Elements
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challengeType: 0
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videoUrl: 'https://scrimba.com/c/cnpymfJ'
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forumTopicId: 301092
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localeTitle: 使用属性选择器来设置元素的样式
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---
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## Description
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<section id='description'>
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你已经通过设置元素的<code>id</code>和<code>class</code>，来显示你想要的样式，而它们也被分别叫做 ID 选择器和 Class 选择器。另外，也还有其他的 CSS 选择器，可以让我们给特定的元素设置样式。
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让我们再次通过猫咪图片项目来练习 CSS 选择器。
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在这个挑战里，你会使用<code>[attr=value]</code>属性选择器修改复选框的样式。这个选择器使用特定的属性值来匹配和设置元素样式。例如，下面的代码会改变所有<code>type</code>为<code>radio</code>的元素的外边距。
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```css
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[type='radio'] {
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margin: 20px 0px 20px 0px;
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}
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```
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</section>
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## Instructions
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<section id='instructions'>
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使用<code>type</code>属性选择器，尝试改变复选框的上外边距为 10px，下外边距为 15px。
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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: '使用<code>type</code>属性选择器来匹配复选框。'
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testString: assert(code.match(/<style>[\s\S]*?\[type=("|')checkbox\1\]\s*?{[\s\S]*?}[\s\S]*?<\/style>/gi));
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- text: '复选框的上外边距应为 10px。'
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testString: assert((function() {var count=0; $("[type='checkbox']").each(function() { if($(this).css('marginTop') === '10px') {count++;}});return (count===3)}()));
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- text: '复选框的下外边距应为 15px。'
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testString: assert((function() {var count=0; $("[type='checkbox']").each(function() { if($(this).css('marginBottom') === '15px') {count++;}});return (count===3)}()));
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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">点击查看更多<a href="#">猫图</a>.</p>
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<a href="#"><img src="https://bit.ly/fcc-relaxing-cat" alt="一只仰卧着的萌猫" class="smaller-image thick-green-border"></a>
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<div class="silver-background">
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<p>猫咪最喜欢的三件东西：</p>
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<ul>
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<li>猫薄荷</li>
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<li>激光笔</li>
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<li>千层饼</li>
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</ul>
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<p>猫咪最讨厌的三件东西：</p>
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<ol>
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<li>跳蚤</li>
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<li>打雷</li>
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<li>同类</li>
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</ol>
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</div>
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<form action="https://freecatphotoapp.com/submit-cat-photo" id="cat-photo-form">
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<label><input type="radio" name="indoor-outdoor">室内</label>
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<label><input type="radio" name="indoor-outdoor">室外</label><br>
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<label><input type="checkbox" name="personality">忠诚</label>
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<label><input type="checkbox" name="personality">懒惰</label>
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<label><input type="checkbox" name="personality">积极</label><br>
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<input type="text" placeholder="猫咪图片地址" required>
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<button type="submit">提交</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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```html
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// solution required
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```
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</section>
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