Babel config file

.babel.config.js

const presets = [
  [
    '@babel/preset-env',
    // 默认是 'auto'
    //{ modules: 'commonjs'},
  ],
];

const plugins = [
  '@babel/plugin-transform-runtime',
  '@babel/plugin-proposal-class-properties',
  '@babel/plugin-proposal-object-rest-spread',
  '@babel/plugin-proposal-optional-chaining',
];

module.exports = {
  presets,
  plugins,
};