.babelrc

{
  "env":{
    "test":{
      "presets":[
        [
          "@babel/preset-env", {
          "modules": false,
          "loose": false,
          "exclude": [ "transform-classes" ]
        }
        ],
        "vue"
      ]
    }
  },
  "presets": [
    ["@babel/preset-env",{"modules":"commonjs"}],
    ["@vue/app", {
      "polyfills": [
        "es6.promise",
        "es6.symbol"
      ]
    }]
  ],
  "plugins": [
    ["add-module-exports"],
    ["@babel/plugin-proposal-decorators", { "legacy": true }],
    ["transform-es2015-modules-commonjs"],
    ["@babel/plugin-proposal-class-properties"],
    ["@babel/plugin-proposal-function-sent"],
    ["@babel/plugin-proposal-export-namespace-from"],
    ["@babel/plugin-proposal-numeric-separator"],
    ["@babel/plugin-proposal-throw-expressions"],
    ["@babel/plugin-syntax-dynamic-import"],
    ["syntax-dynamic-import"],
    [
      "@babel/plugin-transform-runtime", {
      "absoluteRuntime": false,
      "corejs": 2,
      "helpers": true,
      "regenerator": true,
      "useESModules": false
    }
    ]
  ],
 "comments": false
}