1、npm i @babel/core、@babel/preset-env、@babel/runtime、@babel/plugin-transform-runtime、@babel/plugin-proposal-class-properties、@babel/preset-react -D
2、然后在.babelrc文件中添加{"presets":["@babel/preset-env","@babel/preset-react"], "plugins":["@babel/transform-runtime","@babel/plugin-proposal-class-properties"]}
3、在webpackconfig.js文件中添加
module: {
rules: [
{
test: /\.js$/,
exclude: /(node_modules|bower_components)/,
use: {
loader: 'babel-loader',
options: {
presets: ['@babel/preset-env']
}
}
}
]
}
4、npm run dev 大功告成啦