79 lines
2.2 KiB
Markdown
79 lines
2.2 KiB
Markdown
---
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id: bad87fee1348bd9aedd08835
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title: Check Radio Buttons and Checkboxes by Default
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challengeType: 0
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videoUrl: ''
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localeTitle: 默认情况下检查单选按钮和复选框
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---
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## Description
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<section id="description">您可以使用<code>checked</code>属性设置默认情况下要选中的复选框或单选按钮。为此，只需将“checked”一词添加到input元素的内部即可。例如： <code><input type="radio" name="test-name" checked></code> </section>
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## Instructions
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<section id="instructions">默认情况下，设置第一个<code>radio buttons</code>和第一个<code>checkboxes</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: 默认情况下，应检查表单上的第一个单选按钮。
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testString: 'assert($("input[type="radio"]").prop("checked"), "Your first radio button on your form should be checked by default.");'
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- text: 默认情况下，应检查表单上的第一个复选框。
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testString: 'assert($("input[type="checkbox"]").prop("checked"), "Your first checkbox on your form should be checked by default.");'
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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>Click here to view more <a href="#">cat photos</a>.</p>
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<a href="#"><img src="https://bit.ly/fcc-relaxing-cat" alt="A cute orange cat lying on its back."></a>
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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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<form action="/submit-cat-photo">
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<label><input type="radio" name="indoor-outdoor"> 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"> 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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