72 lines
1.8 KiB
Markdown
72 lines
1.8 KiB
Markdown
---
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id: bad87fee1348bd9aedc08830
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title: Use HTML5 to Require a Field
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challengeType: 0
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videoUrl: ''
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localeTitle: 使用HTML5需要字段
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---
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## Description
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<section id="description">您可以要求特定的表单字段，以便您的用户在填写表单之前无法提交表单。例如，如果要创建所需的文本输入字段，只需在<code>input</code>元素中添加<code>required</code>的属性，如下所示： <code><input type="text" required></code> </section>
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## Instructions
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<section id="instructions">使您的文本<code>input</code> <code>required</code>字段，以便您的用户无法在不填写此字段的情况下提交表单。然后尝试提交表单而不输入任何文本。了解您的HTML5表单如何通知您该字段是必需的？ </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: 您的文本<code>input</code>元素应具有<code>required</code>属性。
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testString: 'assert($("input").prop("required"), "Your text <code>input</code> element should have the <code>required</code> attribute.");'
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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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<input type="text" placeholder="cat photo URL">
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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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