creat-react-app引入typescript

creat-react-app引入typescript

• 安装typescript相关开发依赖

  npm install --save @types/react @types/react-dom 
  

  使用@types/前缀表示我们要额外获取react和react-dom的声明文件，可以像品势引入一样，不安装这两个依赖，导入方式是这个样子的

  impore * as React from 'react'
  import * as ReactDOM from 'react-dom'
  

• 安装开发依赖

  npm install typescript awesome-typescript-loader source-map-loader  -D
  

  这些依赖可以使得typescript和webpack更好的工作。awesome-typescript-loader可以让webpack使用typescript的标准配置文件tsconfig.json编译typescript代码，source-map-loader主要是打包后方便调试

• 配置tsconfig.json

  {
    "compilerOptions": {
      "jsx": "react",
      "module": "commonjs",
      "declaration": true,
      "noImplicitAny": false,
      "removeComments": true,
      "noLib": false,
      "allowJs": true,
      "strict": true,
      "moduleResolution": "node",
      "esModuleInterop": true,
      "allowSyntheticDefaultImports": true,
      "emitDecoratorMetadata": true,
      "experimentalDecorators": true,
      "strictNullChecks": true,
      "target": "es2015",
      "resolveJsonModule": true,
      "outDir": "./dist",
      "baseUrl": "./src",
      "lib": [
        "es5",
        "es2015",
        "es2017",
        "dom"
      ]
    },
    "include": [
      "src/**/*"
    ],
    "exclude": [
      "node_modules",
      "**/*.spec.ts"
    ]
  }
  
  

• webpack配置修改

     {
          test: /\.ts|tsx$/, //ts-loader必须在其他处理.js的加载器之前运行
          use: 'awesome-typescript-loader'//之前安装的是ts-loader 导致模块导出的时候报错exports is no defined,在这里替换掉
        },
        {
          test: /\.js|jsx$/,
          use: 'babel-loader',
          exclude: /(node_modules|bower_components)/
        },
  

• 创建.tsx文件

  import  React from "react"
  
  const TsTodoList : React.FC = () => {
    return (
      <div>我是TS版本的tosolist</div>
    )
  }
  
  export default TsTodoList
  
  

• 创建.ts文件

  const key: string = '叶俊宽'
  class Animal {
    name: string = '叶俊宽'
    private age: number = 13
  
    getName(): void {
      console.log(this.name)
    }
  
    getInfo(): string {
      return this.name + this.age
    }
  
    setName(name: string): void {
      this.name = name
    }
  
    static getAge(): void {
      console.log(111)
    }
  
  }
  
  class Dog extends Animal{
    constructor() {
      super()
    }
  }
  
  export default Dog