* chore: rename APIs and Microservices to include "Backend" (#42515) * fix typo * fix typo * undo change * Corrected grammar mistake Corrected a grammar mistake by removing a comma. * change APIs and Microservices cert title * update title * Change APIs and Microservices certi title * Update translations.json * update title * feat(curriculum): rename apis and microservices cert * rename folder structure * rename certificate * rename learn Markdown * apis-and-microservices -> back-end-development-and-apis * update backend meta * update i18n langs and cypress test Co-authored-by: Shaun Hamilton <shauhami020@gmail.com> * fix: add development to front-end libraries (#42512) * fix: added-the-word-Development-to-front-end-libraries * fix/added-the-word-Development-to-front-end-libraries * fix/added-word-development-to-front-end-libraries-in-other-related-files * fix/added-the-word-Development-to-front-end-and-all-related-files * fix/removed-typos-from-last-commit-in-index.md * fix/reverted-changes-that-i-made-to-dependecies * fix/removed xvfg * fix/reverted changes that i made to package.json * remove unwanted changes * front-end-development-libraries changes * rename backend certSlug and README * update i18n folder names and keys * test: add legacy path redirect tests This uses serve.json from the client-config repo, since we currently use that in production * fix: create public dir before moving serve.json * fix: add missing script * refactor: collect redirect tests * test: convert to cy.location for stricter tests * rename certificate folder to 00-certificates * change crowdin config to recognise new certificates location * allow translations to be used Co-authored-by: Nicholas Carrigan (he/him) <nhcarrigan@gmail.com> * add forwards slashes to path redirects * fix cypress path tests again * plese cypress * fix: test different challenge Okay so I literally have no idea why this one particular challenge fails in Cypress Firefox ONLY. Tom and I paired and spun a full build instance and confirmed in Firefox the page loads and redirects as expected. Changing to another bootstrap challenge passes Cypress firefox locally. Absolutely boggled by this. AAAAAAAAAAAAAAA * fix: separate the test Okay apparently the test does not work unless we separate it into a different `it` statement. >:( >:( >:( >:( Co-authored-by: Sujal Gupta <55016909+heysujal@users.noreply.github.com> Co-authored-by: Noor Fakhry <65724923+NoorFakhry@users.noreply.github.com> Co-authored-by: Oliver Eyton-Williams <ojeytonwilliams@gmail.com> Co-authored-by: Nicholas Carrigan (he/him) <nhcarrigan@gmail.com>
111 lines
2.3 KiB
Markdown
111 lines
2.3 KiB
Markdown
---
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id: 5a24bbe0dba28a8d3cbd4c5d
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title: 创建一个复杂的 JSX 元素
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challengeType: 6
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forumTopicId: 301382
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dashedName: create-a-complex-jsx-element
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---
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# --description--
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上一个挑战是 JSX 的一个简单示例,但 JSX 也可以表示更复杂的 HTML。
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关于嵌套的 JSX,需要知道的一件重要的事情,那就是它必须返回单个元素。
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这个父元素将包裹所有其他级别的嵌套元素。
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例如,几个作为兄弟元素编写的 JSX 元素而没有父元素包裹将不会被转换。
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这里是一个示例:
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**有效的 JSX:**
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```jsx
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<div>
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<p>Paragraph One</p>
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<p>Paragraph Two</p>
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<p>Paragraph Three</p>
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</div>
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```
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**无效的 JSX:**
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```jsx
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<p>Paragraph One</p>
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<p>Paragraph Two</p>
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<p>Paragraph Three</p>
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```
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# --instructions--
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定义一个新的常量 `JSX`,渲染一个 `div`,其中依次包含以下元素:
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一个 `h1`,一个 `p`,一个包含三个 `li` 项的无序列表。 可以在每个元素中包含任意文本。
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**注意:** 当像这样渲染多个元素时,可以把它们都用圆括号括起来,但是这并不是必须的。 另外,此挑战使用 `div` 标签把所有子元素包裹在里面。 如果删除 `div`,JSX 将不会编译这些元素。 请记住这一点,因为在 React 组件中返回 JSX 元素时也适用。
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# --hints--
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常量 `JSX` 应该返回一个 `div` 元素。
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```js
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assert(JSX.type === 'div');
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```
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`div` 应该包含一个 `h1` 标签作为第一个元素。
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```js
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assert(JSX.props.children[0].type === 'h1');
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```
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`div`应该包含一个`p`标签作为第二个元素。
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```js
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assert(JSX.props.children[1].type === 'p');
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```
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`div` 应该包含一个 `ul` 标签作为第三个元素。
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```js
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assert(JSX.props.children[2].type === 'ul');
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```
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`ul` 应该包含三个 `li` 元素。
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```js
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assert(
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JSX.props.children
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.filter((ele) => ele.type === 'ul')[0]
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.props.children.filter((ele) => ele.type === 'li').length === 3
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);
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```
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# --seed--
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## --after-user-code--
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```jsx
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ReactDOM.render(JSX, document.getElementById('root'))
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```
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## --seed-contents--
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```jsx
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```
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# --solutions--
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```jsx
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const JSX = (
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<div>
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<h1>Hello JSX!</h1>
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<p>Some info</p>
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<ul>
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<li>An item</li>
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<li>Another item</li>
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<li>A third item</li>
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</ul>
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</div>);
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```
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