100 lines
4.4 KiB
Markdown
100 lines
4.4 KiB
Markdown
---
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id: 5a24c314108439a4d403616e
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title: Access Props Using this.props
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challengeType: 6
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isRequired: false
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videoUrl: ''
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localeTitle: 使用this.props访问道具
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---
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## Description
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<section id="description">最后几个挑战涵盖了将道具传递给子组件的基本方法。但是，如果你传递道具的子组件是ES6类组件，而不是无状态功能组件呢？ ES6类组件使用稍微不同的约定来访问props。无论何时在您自己引用类组件时，都使用<code>this</code>关键字。一类组件中访问的道具，你前言您使用与访问它的代码<code>this</code> 。例如，如果ES6类组件具有名为<code>data</code>的prop，则在JSX中编写<code>{this.props.data}</code> 。 </section>
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## Instructions
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<section id="instructions">在父组件<code>ResetPassword</code>呈现<code>ReturnTempPassword</code>组件的实例。在这里，给<code>ReturnTempPassword</code>一个<code>tempPassword</code>的prop，并为它<code>tempPassword</code>一个至少8个字符长的字符串的值。在子项<code>ReturnTempPassword</code> ，访问<code>strong</code>标记内的<code>tempPassword</code> prop，以确保用户看到临时密码。 </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>ResetPassword</code>组件应返回单个<code>div</code>元素。
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testString: 'assert((function() { const mockedComponent = Enzyme.mount(React.createElement(ResetPassword)); return mockedComponent.children().type() === "div"; })(), "The <code>ResetPassword</code> component should return a single <code>div</code> element.");'
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- text: <code>ResetPassword</code>的第四个子<code>ResetPassword</code>应该是<code>ReturnTempPassword</code>组件。
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testString: 'assert((function() { const mockedComponent = Enzyme.mount(React.createElement(ResetPassword)); return mockedComponent.children().childAt(3).name() === "ReturnTempPassword"; })(), "The fourth child of <code>ResetPassword</code> should be the <code>ReturnTempPassword</code> component.");'
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- text: <code>ReturnTempPassword</code>组件应该有一个名为<code>tempPassword</code>的prop。
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testString: 'assert((function() { const mockedComponent = Enzyme.mount(React.createElement(ResetPassword)); return mockedComponent.find("ReturnTempPassword").props().tempPassword; })(), "The <code>ReturnTempPassword</code> component should have a prop called <code>tempPassword</code>.");'
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- text: <code>ReturnTempPassword</code>的<code>tempPassword</code>道具应该等于至少<code>8</code>字符的字符串。
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testString: 'assert((function() { const mockedComponent = Enzyme.mount(React.createElement(ResetPassword)); const temp = mockedComponent.find("ReturnTempPassword").props().tempPassword; return typeof temp === "string" && temp.length >= 8; })(), "The <code>tempPassword</code> prop of <code>ReturnTempPassword</code> should be equal to a string of at least <code>8</code> characters.");'
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- text: <code>ReturnTempPassword</code>组件应显示您在<code>strong</code>标记内作为<code>tempPassword</code>支柱创建的密码。
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testString: 'assert((function() { const mockedComponent = Enzyme.mount(React.createElement(ResetPassword)); return mockedComponent.find("strong").text() === mockedComponent.find("ReturnTempPassword").props().tempPassword; })(), "The <code>ReturnTempPassword</code> component should display the password you create as the <code>tempPassword</code> prop within <code>strong</code> tags.");'
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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 ReturnTempPassword 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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{ /* change code below this line */ }
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<p>Your temporary password is: <strong></strong></p>
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{ /* change code above this line */ }
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</div>
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);
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}
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};
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class ResetPassword 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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<h2>Reset Password</h2>
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<h3>We've generated a new temporary password for you.</h3>
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<h3>Please reset this password from your account settings ASAP.</h3>
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{ /* change code below this line */ }
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{ /* change code above this line */ }
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</div>
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);
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}
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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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