webpack - "SyntaxError: Cannot use import statement outside a module"与 Babel、Jest 和 webpack

Question

我对 Babel 7、Webpack 4 和 Jest 的配置有疑问。
当我运行测试时，我收到以下错误:

语法错误:无法在模块外使用 import 语句

包.json

 "@babel/core": "^7.7.5",
    "@babel/highlight": "^7.8.3",
    "@babel/plugin-syntax-dynamic-import": "^7.8.3",
    "@babel/preset-env": "^7.8.4",
    "babel-core": "^7.0.0-bridge.0",
    "babel-loader": "^7.1.5",
    "@babel/plugin-transform-runtime": "^7.7.4",
    "@babel/preset-react": "^7.7.4",
    "@babel/runtime": "^7.8.4",
    "babel-jest": "^24.9.0",
    "jest-watch-typeahead": "^0.4.2",
    "vue-jest": "^3.0.5",
    "jest": "^24.9.0",
    "jest-serializer-vue": "^2.0.2",
    "jest-transform-stub": "^2.0.0",

webpack.config.js

  entry: {
      app: ["./src/index.js"]
  },
  output: {
    path: path.resolve('../', 'static/js/'), 
    filename: "[name].js",
    publicPath: '/static/js/', 
    chunkFilename: '[name].chunk.js' 
  }, 

.babelrc - 我认为问题出在 module: false 但如果我不包含它，webpack 不会分 block 我的文件。

{
  "presets": [
    ["@babel/preset-env", {"modules": false}, "jest" ]
  ],
  "plugins": [
    "@babel/plugin-syntax-dynamic-import" 
  ],
    "env": {  
      "test": {
        "plugins": ["@babel/plugin-transform-runtime"],
      }
    }
} 

当我删除 module: false 测试正在运行时，是否有机会不将 module: false 包含到测试中？

Answer 1

来自 Babel Options documentation :

Note: env[envKey] options will be merged on top of the options specified in the root object.

所以你可以申请 modules: "auto"在测试期间通过重新声明 env.test 中的插件目的:

{
  "presets": [
    [
      "@babel/preset-env",
      {
        "modules": false
      },
      "jest"
    ]
  ],
  "plugins": [
    "@babel/plugin-syntax-dynamic-import"
  ],
  "env": {
    "test": {
      "presets": [
        [
          "@babel/preset-env",
          {
            "modules": "auto"
          },
          "jest"
        ]
      ],
      "plugins": [
        "@babel/plugin-transform-runtime"
      ]
    }
  }
}