133 lines
4.1 KiB
Markdown
133 lines
4.1 KiB
Markdown
---
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id: 587d778c367417b2b2512aa9
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title: 使用 HTML5 的 datetime 属性标准化时间
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challengeType: 0
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videoUrl: 'https://scrimba.com/c/cmzMgtz'
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forumTopicId: 301025
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dashedName: standardize-times-with-the-html5-datetime-attribute
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---
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# --description--
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继续日期主题。 HTML5 还引入了 `time` 标签与 `datetime` 属性来标准化时间。 `time` 元素是一个行内元素，用于在一个页面上显示日期或时间。 `datetime` 属性包含的有效格式。 辅助设备可以获取这个值。 这个属性也有助于避免混乱，因为它规定了时间的标准化版本，甚至可以在文本中以非正式的方式或学术方式使用它。
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举个例子：
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```html
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<p>Master Camper Cat officiated the cage match between Goro and Scorpion <time datetime="2013-02-13">last Wednesday</time>, which ended in a draw.</p>
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```
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# --instructions--
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Camper Cat 格斗的调查结果出来了！ 用 `time` 标签包裹文本 `Thursday, September 15<sup>th</sup>`，添加一个 `datetime` 属性，将属性值设置为 `2016-09-15`。
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# --hints--
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应存在一个 `time` 元素和一个内容文本为 `Thank you to everyone for responding to Master Camper Cat's survey.` 的 `p` 元素。
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```js
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assert(timeElement);
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```
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`time` 元素的内容文本应为 `Thursday, September 15<sup>th</sup>`。
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```js
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assert(
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timeElement &&
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timeElement?.innerHTML?.trim() === 'Thursday, September 15<sup>th</sup>'
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);
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```
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`time` 元素应包含非空的 `datetime` 属性。
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```js
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assert(datetimeAttr && datetimeAttr?.length);
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```
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`datetime` 的属性值应为 `2016-09-15`。
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```js
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assert(datetimeAttr === '2016-09-15');
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```
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# --seed--
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## --after-user-code--
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```html
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<script>
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const pElement = [...document.querySelectorAll("article > p")]
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.filter(x => x?.textContent?.includes("Thank you to everyone for responding to Master Camper Cat's survey."));
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const timeElement = pElement[0] ? pElement[0].querySelector("time") : null;
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const datetimeAttr = timeElement?.getAttribute("datetime");
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</script>
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```
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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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<article>
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<h2>Mortal Kombat Tournament Survey Results</h2>
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<!-- Only change code below this line -->
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<p>Thank you to everyone for responding to Master Camper Cat's survey. The best day to host the vaunted Mortal Kombat tournament is Thursday, September 15<sup>th</sup>. May the best ninja win!</p>
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<!-- Only change code above this line -->
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<section>
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<h3>Comments:</h3>
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<article>
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<p>Posted by: Sub-Zero on <time datetime="2016-08-13T20:01Z">August 13<sup>th</sup></time></p>
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<p>Johnny Cage better be there, I'll finish him!</p>
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</article>
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<article>
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<p>Posted by: Doge on <time datetime="2016-08-15T08:12Z">August 15<sup>th</sup></time></p>
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<p>Wow, much combat, so mortal.</p>
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</article>
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<article>
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<p>Posted by: The Grim Reaper on <time datetime="2016-08-16T00:00Z">August 16<sup>th</sup></time></p>
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<p>Looks like I'll be busy that day.</p>
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</article>
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</section>
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</article>
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<footer>© 2018 Camper Cat</footer>
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</body>
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```
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# --solutions--
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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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<article>
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<h2>Mortal Kombat Tournament Survey Results</h2>
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<p>Thank you to everyone for responding to Master Camper Cat's survey. The best day to host the vaunted Mortal Kombat tournament is <time datetime="2016-09-15">Thursday, September 15<sup>th</sup></time>. May the best ninja win!</p>
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<section>
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<h3>Comments:</h3>
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<article>
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<p>Posted by: Sub-Zero on <time datetime="2016-08-13T20:01Z">August 13<sup>th</sup></time></p>
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<p>Johnny Cage better be there, I'll finish him!</p>
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</article>
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<article>
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<p>Posted by: Doge on <time datetime="2016-08-15T08:12Z">August 15<sup>th</sup></time></p>
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<p>Wow, much combat, so mortal.</p>
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</article>
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<article>
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<p>Posted by: The Grim Reaper on <time datetime="2016-08-16T00:00Z">August 16<sup>th</sup></time></p>
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<p>Looks like I'll be busy that day.</p>
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</article>
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</section>
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</article>
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<footer>© 2018 Camper Cat</footer>
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</body>
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```
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