102 lines
3.1 KiB
Markdown
102 lines
3.1 KiB
Markdown
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---
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id: bad87fee1348bd9aedf08834
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challengeType: 0
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videoUrl: 'https://scrimba.com/p/pVMPUv/cNWKvuR'
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forumTopicId: 16822
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localeTitle: 创建一组单选按钮
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---
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## Description
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<section id='description'>
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<code>radio buttons</code>(单选按钮)就好比单项选择题,正确答案只有一个。
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单选按钮是<code>input</code>选择框的一种类型。
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每一个单选按钮都应该嵌套在它自己的<code>label</code>(标签)元素中。
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所有关联的单选按钮应该拥有相同的<code>name</code>属性。
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下面是一个单选按钮的例子:
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```html
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<label>
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<input type="radio" name="indoor-outdoor">Indoor
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</label>
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```
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最佳实践是在<code>label</code>元素上设置for属性,让其值与单选按钮的<code>id</code>属性值相等,这样就在<code>label</code>元素和它的子元素单选按钮之间创建了一种链接关系。例如:
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```html
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<label for="indoor">
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<input id="indoor" type="radio" name="indoor-outdoor">Indoor
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</label>
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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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给表单添加两个单选按钮,一个叫<code>indoor</code>,另一个叫<code>outdoor</code>,单选按钮的 <code>name</code> 为 <code>indoor-outdoor</code>。
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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: '页面上应该有两个单选按钮元素。'
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testString: assert($('input[type="radio"]').length > 1);
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- text: '设置单选按钮的<code>name</code>属性为<code>indoor-outdoor</code>。'
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testString: assert($('input[type="radio"]').filter("[name='indoor-outdoor']").length > 1);
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- text: '每一个单选按钮都应该嵌套进它自己的<code>label</code>元素中。'
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testString: assert($('label > input[type="radio"]:only-child').length > 1);
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- text: '每一个<code>label</code>元素都有结束标记。'
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testString: assert((code.match(/<\/label>/g) && code.match(/<label/g) && code.match(/<\/label>/g).length === code.match(/<label/g).length));
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- text: '其中一个<code>label</code>元素的文本为<code>indoor</code>。'
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testString: assert($("label").text().match(/indoor/gi));
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- text: '其中一个<code>label</code>元素的文本为<code>outdoor</code>。'
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testString: assert($("label").text().match(/outdoor/gi));
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- text: '所有的单选按钮都应该包含在<code>form</code>表单中。'
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testString: assert($("label").parent().get(0).tagName.match('FORM'));
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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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<h2>CatPhotoApp</h2>
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<main>
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<p>点击查看更多<a href="#">猫咪图片</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"></a>
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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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<form action="https://freecatphotoapp.com/submit-cat-photo">
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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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</section>
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