es6 转 es5
npm i babel-loader @babel/core @babel/preset-env -D
{
test: /\.js$/,
use: {
loader: 'babel-loader',
options: {
presets: [
'@babel/preset-env'
],
plugins:[
["@babel/plugin-proposal-decorators", { "legacy": true }],
["@babel/plugin-proposal-class-properties", { "loose" : true }]
]
}
}
}