1.安装包prop-types

npm i prop-types

2.导入prop-types

import "./App.css"

import React from "react"

import propTypes from "prop-types"

//类组件

class App extends React.Component {

render() {

const { color } = this.props

return (

{color.map((item) => (

{color}

))}

)

}

}

App.propTypes = {

color: propTypes.array,

}

export default App

3.用法

 

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