freeCodeCamp/curriculum/challenges/chinese/01-responsive-web-design/basic-html-and-html5/use-the-value-attribute-wit...

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---
id: 5c6c06847491271903d37cfd
title: 使用单选框和复选框的 value 属性
challengeType: 0
forumTopicId: 301099
dashedName: use-the-value-attribute-with-radio-buttons-and-checkboxes
---
# --description--
提交表单时,所选项的值会发送给服务端。 `radio``checkbox``value` 属性值决定了发送到服务端的实际内容。
例如:
```html
<label for="indoor">
<input id="indoor" value="indoor" type="radio" name="indoor-outdoor">Indoor
</label>
<label for="outdoor">
<input id="outdoor" value="outdoor" type="radio" name="indoor-outdoor">Outdoor
</label>
```
这里有两个 `radio` 单选框。 当用户提交表单时,如果 `indoor` 选项被选中,表单数据会包含:`indoor-outdoor=indoor`。 也就是所选项的 `name``value` 属性值。
如果没有指明 `value` 属性值,则会使用默认值做为表单数据提交,也就是 `on`。 在这种情况下,如果用户选中 "indoor" 选项然后提交表单,表单数据则会包含 `indoor-outdoor=on`。 这样的表单数据看起来不够直观,因此最好将 `value` 属性值设置为一些有意义的内容。
# --instructions--
给每一个 `radio``checkbox` 输入框添加 `value` 属性。 使用输入标签的文本,小写形式,作为属性的值。
# --hints--
应有一个单选按钮的 `value` 属性值为 `indoor`
```js
assert(
$('label:contains("Indoor") > input[type="radio"]').filter("[value='indoor']")
.length > 0
);
```
应有一个单选按钮的 `value` 属性值为 `outdoor`
```js
assert(
$('label:contains("Outdoor") > input[type="radio"]').filter(
"[value='outdoor']"
).length > 0
);
```
应有一个复选框的 `value` 属性值为 `loving`
```js
assert(
$('label:contains("Loving") > input[type="checkbox"]').filter(
"[value='loving']"
).length > 0
);
```
应有一个复选框的 `value` 属性值为 `lazy`
```js
assert(
$('label:contains("Lazy") > input[type="checkbox"]').filter("[value='lazy']")
.length > 0
);
```
应有一个复选框的 `value` 属性值为 `energetic`
```js
assert(
$('label:contains("Energetic") > input[type="checkbox"]').filter(
"[value='energetic']"
).length > 0
);
```
# --seed--
## --seed-contents--
```html
<h2>CatPhotoApp</h2>
<main>
<p>Click here to view more <a href="#">cat photos</a>.</p>
<a href="#"><img src="https://bit.ly/fcc-relaxing-cat" alt="A cute orange cat lying on its back."></a>
<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>
<form action="https://freecatphotoapp.com/submit-cat-photo">
<label for="indoor"><input id="indoor" type="radio" name="indoor-outdoor"> Indoor</label>
<label for="outdoor"><input id="outdoor" type="radio" name="indoor-outdoor"> Outdoor</label><br>
<label for="loving"><input id="loving" type="checkbox" name="personality"> Loving</label>
<label for="lazy"><input id="lazy" type="checkbox" name="personality"> Lazy</label>
<label for="energetic"><input id="energetic" type="checkbox" name="personality"> Energetic</label><br>
<input type="text" placeholder="cat photo URL" required>
<button type="submit">Submit</button>
</form>
</main>
```
# --solutions--
```html
<h2>CatPhotoApp</h2>
<main>
<p>Click here to view more <a href="#">cat photos</a>.</p>
<a href="#"><img src="https://bit.ly/fcc-relaxing-cat" alt="A cute orange cat lying on its back."></a>
<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>
<form action="https://freecatphotoapp.com/submit-cat-photo">
<label for="indoor"><input id="indoor" type="radio" name="indoor-outdoor" value="indoor"> Indoor</label>
<label for="outdoor"><input id="outdoor" type="radio" name="indoor-outdoor" value="outdoor"> Outdoor</label><br>
<label for="loving"><input id="loving" type="checkbox" name="personality" value="loving"> Loving</label>
<label for="lazy"><input id="lazy" type="checkbox" name="personality" value="lazy"> Lazy</label>
<label for="energetic"><input id="energetic" type="checkbox" name="personality" value="energetic"> Energetic</label><br>
<input type="text" placeholder="cat photo URL" required>
<button type="submit">Submit</button>
</form>
</main>
```