122 lines
3.3 KiB
Markdown
122 lines
3.3 KiB
Markdown
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---
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id: 587d7788367417b2b2512aa2
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title: 使用 nav 元素使屏幕閱讀器更容易導航
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challengeType: 0
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videoUrl: 'https://scrimba.com/c/czVwWSv'
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forumTopicId: 301024
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dashedName: make-screen-reader-navigation-easier-with-the-nav-landmark
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---
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# --description--
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`nav` 也是一個具有語義化特性的 HTML5 標籤，它可以使屏幕閱讀器快速識別出頁面中的導航信息。 它用於呈現頁面中的主導航鏈接。
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對於在多個頁面底部出現的站點鏈接，我們不需要使用 `nav` 標籤。 我們將會在下個挑戰中學習 `footer` 標籤的使用。
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# --instructions--
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Camper Cat 在他的忍者訓練頁面頂端放置了多個導航鏈接，但這些鏈接都寫在了 `div` 中。 請將 `div` 標籤更改爲 `nav` 標籤，以提升頁面的可訪問性。
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# --hints--
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應存在一個 `nav` 標籤。
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```js
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assert($('nav').length == 1);
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```
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`nav` 標籤應包含 `ul` 標籤及其列表項。
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```js
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assert($('nav').children('ul').length == 1);
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```
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不應存在 `div` 標籤。
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```js
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assert($('div').length == 0);
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```
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確保 `nav` 標籤是閉合的。
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```js
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assert(
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code.match(/<\/nav>/g) &&
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code.match(/<\/nav>/g).length === code.match(/<nav>/g).length
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);
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```
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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>Training with Camper Cat</h1>
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<div>
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<ul>
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<li><a href="#stealth">Stealth & Agility</a></li>
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<li><a href="#combat">Combat</a></li>
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<li><a href="#weapons">Weapons</a></li>
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</ul>
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</div>
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</header>
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<main>
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<section id="stealth">
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<h2>Stealth & Agility Training</h2>
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<article><h3>Climb foliage quickly using a minimum spanning tree approach</h3></article>
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<article><h3>No training is NP-complete without parkour</h3></article>
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</section>
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<section id="combat">
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<h2>Combat Training</h2>
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<article><h3>Dispatch multiple enemies with multithreaded tactics</h3></article>
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<article><h3>Goodbye world: 5 proven ways to knock out an opponent</h3></article>
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</section>
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<section id="weapons">
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<h2>Weapons Training</h2>
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<article><h3>Swords: the best tool to literally divide and conquer</h3></article>
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<article><h3>Breadth-first or depth-first in multi-weapon training?</h3></article>
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</section>
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</main>
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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>Training with Camper Cat</h1>
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<nav>
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<ul>
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<li><a href="#stealth">Stealth & Agility</a></li>
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<li><a href="#combat">Combat</a></li>
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<li><a href="#weapons">Weapons</a></li>
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</ul>
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</nav>
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</header>
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<main>
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<section id="stealth">
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<h2>Stealth & Agility Training</h2>
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<article><h3>Climb foliage quickly using a minimum spanning tree approach</h3></article>
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<article><h3>No training is NP-complete without parkour</h3></article>
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</section>
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<section id="combat">
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<h2>Combat Training</h2>
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<article><h3>Dispatch multiple enemies with multithreaded tactics</h3></article>
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<article><h3>Goodbye world: 5 proven ways to knock out an opponent</h3></article>
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</section>
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<section id="weapons">
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<h2>Weapons Training</h2>
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<article><h3>Swords: the best tool to literally divide and conquer</h3></article>
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<article><h3>Breadth-first or depth-first in multi-weapon training?</h3></article>
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</section>
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</main>
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</body>
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```
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