2018-10-10 22:03:03 +00:00
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---
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id: 587d778b367417b2b2512aa8
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2020-12-16 07:37:30 +00:00
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title: 添加可访问的日期选择器
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2018-10-10 22:03:03 +00:00
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challengeType: 0
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2020-02-11 09:06:41 +00:00
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videoUrl: 'https://scrimba.com/c/cR3bRbCV'
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forumTopicId: 301008
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2021-01-13 02:31:00 +00:00
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dashedName: add-an-accessible-date-picker
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2018-10-10 22:03:03 +00:00
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---
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2020-12-16 07:37:30 +00:00
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# --description--
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2021-01-08 19:20:48 +00:00
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表单中经常出现 `input` 标签，它可以用来创建多种表单控件。它的 `type` 属性指定了所要创建的 `input` 标签类型。
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2020-12-16 07:37:30 +00:00
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2021-01-08 19:20:48 +00:00
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在以前的挑战中，我们已经见过 `text` 与 `submit` 类型的 `input` 标签。HTML5 规范添加了 `date` 类型来创建日期选择器。如果浏览器支持，在点击 `input` 标签时，日期选择器会显示出来，这让用户填写表单变得更加容易。
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2020-12-16 07:37:30 +00:00
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2021-01-08 19:20:48 +00:00
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对于旧版本的浏览器，由于不支持 `date`，此时 `type` 属性会被浏览器设置为 `text`。这种情况下，我们可以利用 `label` 标签或者占位符文本来提示用户需要输入的日期格式。
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2020-12-16 07:37:30 +00:00
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2020-02-11 09:06:41 +00:00
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举个例子：
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```html
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<label for="input1">Enter a date:</label>
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<input type="date" id="input1" name="input1">
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```
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2020-12-16 07:37:30 +00:00
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# --instructions--
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2018-10-10 22:03:03 +00:00
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2021-01-08 19:20:48 +00:00
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Camper Cat 想举办一场比武大会，他想收集参赛者的最佳参赛时间。请为 Camper Cat 的页面添加一个 `input` 标签，其 `type` 属性值为 "date"，`id` 为 "pickdate"，`name` 属性值为 "date"。
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2018-10-10 22:03:03 +00:00
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2020-12-16 07:37:30 +00:00
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# --hints--
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2018-10-10 22:03:03 +00:00
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2021-01-08 19:20:48 +00:00
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应有 1 个 `input` 标签。
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2018-10-10 22:03:03 +00:00
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2020-12-16 07:37:30 +00:00
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```js
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assert($('input').length == 2);
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2018-10-10 22:03:03 +00:00
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```
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2021-01-08 19:20:48 +00:00
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`input` 标签的 `type` 属性值应该为 date。
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2018-10-10 22:03:03 +00:00
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2020-12-16 07:37:30 +00:00
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```js
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assert($('input').attr('type') == 'date');
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2018-10-10 22:03:03 +00:00
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```
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2021-01-08 19:20:48 +00:00
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`input` 标签的 `id` 应为 pickdate。
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2018-10-10 22:03:03 +00:00
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2020-12-16 07:37:30 +00:00
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```js
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assert($('input').attr('id') == 'pickdate');
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```
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2018-10-10 22:03:03 +00:00
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2021-01-08 19:20:48 +00:00
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`input` 标签的 `name` 属性值应该为 date。
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2018-10-10 22:03:03 +00:00
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2020-12-16 07:37:30 +00:00
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```js
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assert($('input').attr('name') == 'date');
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2018-10-10 22:03:03 +00:00
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```
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2020-02-11 09:06:41 +00:00
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2021-01-13 02:31:00 +00:00
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# --seed--
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## --seed-contents--
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```html
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<body>
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<header>
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<h1>Tournaments</h1>
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</header>
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<main>
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<section>
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<h2>Mortal Kombat Tournament Survey</h2>
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<form>
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<p>Tell us the best date for the competition</p>
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<label for="pickdate">Preferred Date:</label>
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<!-- Only change code below this line -->
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<!-- Only change code above this line -->
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<input type="submit" name="submit" value="Submit">
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</form>
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</section>
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</main>
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<footer>© 2018 Camper Cat</footer>
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</body>
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```
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2020-12-16 07:37:30 +00:00
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# --solutions--
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2021-01-13 02:31:00 +00:00
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```html
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<body>
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<header>
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<h1>Tournaments</h1>
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</header>
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<main>
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<section>
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<h2>Mortal Kombat Tournament Survey</h2>
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<form>
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<p>Tell us the best date for the competition</p>
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<label for="pickdate">Preferred Date:</label>
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<input type="date" id="pickdate" name="date">
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<input type="submit" name="submit" value="Submit">
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</form>
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</section>
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</main>
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<footer>© 2018 Camper Cat</footer>
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</body>
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```
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