149 lines
4.6 KiB
Markdown
149 lines
4.6 KiB
Markdown
---
|
|
id: 5c6c06847491271903d37cfd
|
|
title: 使用單選框和複選框的 value 屬性
|
|
challengeType: 0
|
|
forumTopicId: 301099
|
|
dashedName: use-the-value-attribute-with-radio-buttons-and-checkboxes
|
|
---
|
|
|
|
# --description--
|
|
|
|
提交表單時，所選項的值會發送給服務端。 `radio` 和 `checkbox` 的 `value` 屬性值決定了發送到服務端的實際內容。
|
|
|
|
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>
|
|
```
|
|
|
|
這裏有兩個 `radio` 單選框。 當用戶提交表單時，如果 `indoor` 選項被選中，表單數據會包含：`indoor-outdoor=indoor`。 也就是所選項的 `name` 和 `value` 屬性值。
|
|
|
|
如果沒有指明 `value` 屬性值，則會使用默認值做爲表單數據提交，也就是 `on`。 在這種情況下，如果用戶選中 "indoor" 選項然後提交表單，表單數據則會包含 `indoor-outdoor=on`。 這樣的表單數據看起來不夠直觀，因此最好將 `value` 屬性值設置爲一些有意義的內容。
|
|
|
|
# --instructions--
|
|
|
|
給每一個 `radio` 和 `checkbox` 輸入框添加 `value` 屬性。 不要創建任何新的 radio 或 checkbox 元素。 輸入框標籤文本使用小寫字母作爲屬性值。
|
|
|
|
# --hints--
|
|
|
|
應有一個單選按鈕的 `value` 屬性值爲 `indoor`。
|
|
|
|
```js
|
|
assert(
|
|
$('label:contains("Indoor") > input[type="radio"]').filter("[value='indoor']")
|
|
.length > 0
|
|
);
|
|
```
|
|
|
|
應有一個單選按鈕的 `value` 屬性值爲 `outdoor`。
|
|
|
|
```js
|
|
assert(
|
|
$('label:contains("Outdoor") > input[type="radio"]').filter(
|
|
"[value='outdoor']"
|
|
).length > 0
|
|
);
|
|
```
|
|
|
|
應有一個複選框的 `value` 屬性值爲 `loving`。
|
|
|
|
```js
|
|
assert(
|
|
$('label:contains("Loving") > input[type="checkbox"]').filter(
|
|
"[value='loving']"
|
|
).length > 0
|
|
);
|
|
```
|
|
|
|
應有一個複選框的 `value` 屬性值爲 `lazy`。
|
|
|
|
```js
|
|
assert(
|
|
$('label:contains("Lazy") > input[type="checkbox"]').filter("[value='lazy']")
|
|
.length > 0
|
|
);
|
|
```
|
|
|
|
應有一個複選框的 `value` 屬性值爲 `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://cdn.freecodecamp.org/curriculum/cat-photo-app/relaxing-cat.jpg" 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://www.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://cdn.freecodecamp.org/curriculum/cat-photo-app/relaxing-cat.jpg" 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://www.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>
|
|
```
|