104 lines
3.3 KiB
Markdown
104 lines
3.3 KiB
Markdown
---
|
||
id: 5a24c314108439a4d4036165
|
||
title: Use React to Render Nested Components
|
||
challengeType: 6
|
||
isRequired: false
|
||
videoUrl: ''
|
||
localeTitle: 使用React渲染嵌套组件
|
||
---
|
||
|
||
## Description
|
||
<section id="description">最后一个挑战显示了组合两个组件的简单方法，但是有许多不同的方法可以使用React组合组件。组件组合是React强大的功能之一。当您使用React时，重要的是开始根据组件（如上一个挑战中的App示例）考虑您的用户界面。您将UI分解为其基本构建块，这些块成为组件。这有助于将负责UI的代码与负责处理应用程序逻辑的代码分开。它可以大大简化复杂项目的开发和维护。 </section>
|
||
|
||
## Instructions
|
||
<section id="instructions">代码编辑器中定义了两个功能组件，名为<code>TypesOfFruit</code>和<code>Fruits</code> 。取<code>TypesOfFruit</code>组分和构成它，或者它<em>窝</em> ，所述内<code>Fruits</code>组分。然后使用<code>Fruits</code>组件并将其嵌套在<code>TypesOfFood</code>组件中。结果应该是一个嵌套在父组件中的子组件，它嵌套在它自己的父组件中！ </section>
|
||
|
||
## Tests
|
||
<section id='tests'>
|
||
|
||
```yml
|
||
tests:
|
||
- text: <code>TypesOfFood</code>组件应返回单个<code>div</code>元素。
|
||
testString: 'assert(Enzyme.shallow(React.createElement(TypesOfFood)).type() === "div", "The <code>TypesOfFood</code> component should return a single <code>div</code> element.");'
|
||
- text: <code>TypesOfFood</code>组件应返回<code>Fruits</code>组件。
|
||
testString: 'assert(Enzyme.shallow(React.createElement(TypesOfFood)).props().children[1].type.name === "Fruits", "The <code>TypesOfFood</code> component should return the <code>Fruits</code> component.");'
|
||
- text: <code>Fruits</code>组件应返回<code>TypesOfFruit</code>组件。
|
||
testString: 'assert(Enzyme.mount(React.createElement(TypesOfFood)).find("h2").html() === "<h2>Fruits:</h2>", "The <code>Fruits</code> component should return the <code>TypesOfFruit</code> component.");'
|
||
- text: <code>TypesOfFruit</code>组件应返回<code>h2</code>和<code>ul</code>元素。
|
||
testString: 'assert(Enzyme.mount(React.createElement(TypesOfFood)).find("ul").text() === "ApplesBlueberriesStrawberriesBananas", "The <code>TypesOfFruit</code> component should return the <code>h2</code> and <code>ul</code> elements.");'
|
||
|
||
```
|
||
|
||
</section>
|
||
|
||
## Challenge Seed
|
||
<section id='challengeSeed'>
|
||
|
||
<div id='jsx-seed'>
|
||
|
||
```jsx
|
||
const TypesOfFruit = () => {
|
||
return (
|
||
<div>
|
||
<h2>Fruits:</h2>
|
||
<ul>
|
||
<li>Apples</li>
|
||
<li>Blueberries</li>
|
||
<li>Strawberries</li>
|
||
<li>Bananas</li>
|
||
</ul>
|
||
</div>
|
||
);
|
||
};
|
||
|
||
const Fruits = () => {
|
||
return (
|
||
<div>
|
||
{ /* change code below this line */ }
|
||
|
||
{ /* change code above this line */ }
|
||
</div>
|
||
);
|
||
};
|
||
|
||
class TypesOfFood extends React.Component {
|
||
constructor(props) {
|
||
super(props);
|
||
}
|
||
|
||
render() {
|
||
return (
|
||
<div>
|
||
<h1>Types of Food:</h1>
|
||
{ /* change code below this line */ }
|
||
|
||
{ /* change code above this line */ }
|
||
</div>
|
||
);
|
||
}
|
||
};
|
||
|
||
```
|
||
|
||
</div>
|
||
|
||
|
||
### After Test
|
||
<div id='jsx-teardown'>
|
||
|
||
```js
|
||
console.info('after the test');
|
||
```
|
||
|
||
</div>
|
||
|
||
</section>
|
||
|
||
## Solution
|
||
<section id='solution'>
|
||
|
||
```js
|
||
// solution required
|
||
```
|
||
</section>
|