详解create-react-app 2.0版本如何启用装饰器语法

create-react-app(简称cra)已经更新之2.0.3版本, babel也更新至7.x版本, JavaScript装饰器语法虽然还不是标准, 但是借助于babel, 也能在项目里愉快的玩耍.

cra2.0时代如何启用装饰器语法呢? 我们依旧采用的是react-app-rewired, 通过劫持webpack cofig对象, 达到修改的目的.

yarn add react-app-rewired

修改package.json

"scripts": {

"start": "react-app-rewired start",

"build": "react-app-rewired build",

"test": "react-app-rewired test"

}

安装装饰器语法所需的babel插件, 也可以顺带升级babel-core

yarn add @babel/plugin-proposal-decorators metro-react-native-babel-preset -D

在项目根目录下创建.babelrc, config-overrides.js文件

// .babelrc

{

"presets": ["module:metro-react-native-babel-preset"],

"plugins": [

[

"@babel/plugin-proposal-decorators",

{

"legacy": true

}

]

]

}

// config-overrides

const { getBabelLoader } = require('react-app-rewired');

const path = require('path');

module.exports = function override(config, env) {

const babelLoader = getBabelLoader(config.module.rules);

const pwd = path.resolve();

babelLoader.include = [path.normalize(`${pwd}/src`)];

// use babelrc

babelLoader.options.babelrc = true;

return config;

};

原理就是劫持了config对象, 对其babel规则进行简单的修改.

附上完整的package.json

{

"name": "my-react-project",

"version": "0.1.0",

"private": true,

"dependencies": {

"react": "^16.5.2",

"react-app-rewired": "^1.6.2",

"react-dom": "^16.5.2",

"react-scripts": "2.0.5"

},

"scripts": {

"start": "react-app-rewired start",

"build": "react-app-rewired build",

"test": "react-app-rewired test"

},

"eslintConfig": {

"extends": "react-app"

},

"browserslist": [

">0.2%",

"not dead",

"not ie <= 11",

"not op_mini all"

],

"devDependencies": {

"@babel/plugin-proposal-decorators": "^7.1.2",

"metro-react-native-babel-preset": "^0.48.1",

"webpack-bundle-analyzer": "^3.0.3"

}

}

以上是 详解create-react-app 2.0版本如何启用装饰器语法 的全部内容, 来源链接: utcz.com/z/348151.html

回到顶部