90 lines
4.6 KiB
Markdown
90 lines
4.6 KiB
Markdown
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---
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id: 5a24c314108439a4d403616f
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title: Review Using Props with Stateless Functional Components
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challengeType: 6
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isRequired: false
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videoUrl: ''
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localeTitle: 查看使用无状态功能组件的道具
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---
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## Description
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<section id="description">除了最后的挑战,你已经将道具传递给无状态功能组件。这些组件就像纯函数一样。他们接受道具作为输入,并在每次传递相同的道具时返回相同的视图。您可能想知道状态是什么,下一个挑战将更详细地介绍它。在此之前,这里是对组件术语的回顾。 <em>无状态功能组件</em>是您编写的任何接受道具并返回JSX的函数。另一方面, <em>无状态组件</em>是扩展<code>React.Component</code>的类,但不使用内部状态(在下一个挑战中涵盖)。最后,有<em>状态组件</em>是保持其自身内部状态的任何组件。您可能会看到有状态组件简称为组件或React组件。一种常见的模式是尽可能地减少有状态并创建无状态功能组件。这有助于将状态管理包含到应用程序的特定区域。反过来,通过更容易地了解状态更改如何影响其行为,这可以改善应用程序的开发和维护。 </section>
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## Instructions
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<section id="instructions">代码编辑器有一个<code>CampSite</code>组件,它将<code>Camper</code>组件呈现为子组件。定义<code>Camper</code>组件并为其指定<code>{ name: 'CamperBot' }</code>默认道具。在<code>Camper</code>组件内部,渲染您想要的任何代码,但要确保有一个<code>p</code>元素仅包含作为<code>prop</code>传递的<code>name</code>值。最后,在<code>Camper</code>组件上定义<code>propTypes</code> ,要求将<code>name</code>作为prop提供,并验证它是<code>string</code>类型。 </section>
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## Tests
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<section id='tests'>
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```yml
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tests:
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- text: <code>CampSite</code>组件应该呈现。
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testString: 'assert((function() { const mockedComponent = Enzyme.mount(React.createElement(CampSite)); return mockedComponent.find("CampSite").length === 1; })(), "The <code>CampSite</code> component should render.");'
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- text: <code>Camper</code>组件应呈现。
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testString: 'assert((function() { const mockedComponent = Enzyme.mount(React.createElement(CampSite)); return mockedComponent.find("Camper").length === 1; })(), "The <code>Camper</code> component should render.");'
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- text: <code>Camper</code>组件应该包含默认道具,它将字符串<code>CamperBot</code>分配给键<code>name</code> 。
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testString: 'getUserInput => assert((function() { const noWhiteSpace = getUserInput("index").replace(/\s/g, ""); const verify1 = "Camper.defaultProps={name:\"CamperBot\"}"; const verify2 = "Camper.defaultProps={name:"CamperBot"}"; return (noWhiteSpace.includes(verify1) || noWhiteSpace.includes(verify2)); })(), "The <code>Camper</code> component should include default props which assign the string <code>CamperBot</code> to the key <code>name</code>.");'
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- text: <code>Camper</code>组件应包含要求<code>name</code> prop为<code>string</code>类型的prop类型。
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testString: 'getUserInput => assert((function() { const mockedComponent = Enzyme.mount(React.createElement(CampSite)); const noWhiteSpace = getUserInput("index").replace(/\s/g, ""); const verifyDefaultProps = "Camper.propTypes={name:PropTypes.string.isRequired}"; return noWhiteSpace.includes(verifyDefaultProps); })(), "The <code>Camper</code> component should include prop types which require the <code>name</code> prop to be of type <code>string</code>.");'
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- text: <code>Camper</code>组件应包含一个<code>p</code>元素,其中只包含<code>name</code> prop的文本。
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testString: 'assert((function() { const mockedComponent = Enzyme.mount(React.createElement(CampSite)); return mockedComponent.find("p").text() === mockedComponent.find("Camper").props().name; })(), "The <code>Camper</code> component should contain a <code>p</code> element with only the text from the <code>name</code> prop.");'
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```
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</section>
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## Challenge Seed
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<section id='challengeSeed'>
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<div id='jsx-seed'>
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```jsx
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class CampSite extends React.Component {
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constructor(props) {
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super(props);
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}
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render() {
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return (
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<div>
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<Camper/>
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</div>
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);
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}
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};
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// change code below this line
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```
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</div>
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### Before Test
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<div id='jsx-setup'>
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```jsx
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var PropTypes = {
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string: { isRequired: true }
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};
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```
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</div>
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### After Test
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<div id='jsx-teardown'>
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```js
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console.info('after the test');
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```
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</div>
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</section>
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## Solution
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<section id='solution'>
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```js
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// solution required
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```
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</section>
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