babel在webpack中的配置

npm i babel-core babel-loader babel-plugin-transform-runtime -D
npm i babel-preset-env babel-preset-stage-0 -D

webpack.config.js

{ test: /\.js$/, use: 'babel-loader', exclude: /node_modules/ } //配置babel转换ES6语法

添加文件.babelrc

{
    "presets": ["env", "stage-0"],
    "plugins": ["transform-runtime"]
}

可能会出现babel-loader和babel-core版本的问题，babel-loader 7要对应babel-core 6
直接安装会安装babel-loader 8,卸掉重装