dcWaterService/babel.config.js

module.exports = {
  presets: [
    '@vue/app'
  ],
  plugins: [
    'transform-remove-strict-mode', // 配置插件，这里很重要
    '@babel/plugin-proposal-optional-chaining', // 可选链 ?.
    '@babel/plugin-proposal-nullish-coalescing-operator' // 空值合并 ??
  ],
  ignore: [
    './public/Voice/*.js',
    './src/layout/js/*.js'
  ]

}