Files
Shaun Hamilton c2a11ad00d feat: add 'back/front end' in curriculum (#42596)
* 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>
2021-08-13 21:57:13 -05:00

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---
id: 5a24bbe0dba28a8d3cbd4c5d
title: 创建一个复杂的 JSX 元素
challengeType: 6
forumTopicId: 301382
dashedName: create-a-complex-jsx-element
---
# --description--
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。
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。
这个父元素将包裹所有其他级别的嵌套元素。
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。
这里是一个示例:
**有效的 JSX**
```jsx
<div>
<p>Paragraph One</p>
<p>Paragraph Two</p>
<p>Paragraph Three</p>
</div>
```
**无效的 JSX**
```jsx
<p>Paragraph One</p>
<p>Paragraph Two</p>
<p>Paragraph Three</p>
```
# --instructions--
定义一个新的常量 `JSX`,渲染一个 `div`,其中依次包含以下元素:
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。
**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。
# --hints--
常量 `JSX` 应该返回一个 `div` 元素。
```js
assert(JSX.type === 'div');
```
`div` 应该包含一个 `h1` 标签作为第一个元素。
```js
assert(JSX.props.children[0].type === 'h1');
```
`div`应该包含一个`p`标签作为第二个元素。
```js
assert(JSX.props.children[1].type === 'p');
```
`div` 应该包含一个 `ul` 标签作为第三个元素。
```js
assert(JSX.props.children[2].type === 'ul');
```
`ul` 应该包含三个 `li` 元素。
```js
assert(
JSX.props.children
.filter((ele) => ele.type === 'ul')[0]
.props.children.filter((ele) => ele.type === 'li').length === 3
);
```
# --seed--
## --after-user-code--
```jsx
ReactDOM.render(JSX, document.getElementById('root'))
```
## --seed-contents--
```jsx
```
# --solutions--
```jsx
const JSX = (
<div>
<h1>Hello JSX!</h1>
<p>Some info</p>
<ul>
<li>An item</li>
<li>Another item</li>
<li>A third item</li>
</ul>
</div>);
```