Question

每当我使用npm在服务器端安装我的依赖项时，我都会收到一个持久的Jest错误。使用yarn安装相同的依赖项是可行的，但是我目前正在一个团队中使用npm。我已经尝试过所有关于Stack Overflow的建议解决方案，无论是否支持，都没有一个适合我。到目前为止，我问过的两位资深开发人员认为在我全球安装的npm软件包中没有任何会导致这种情况的原因。

我运行的每个Jest测试套件都会出现此错误：

●测试套件无法运行

Requires Babel "^7.0.0-0", but was loaded with "6.26.3". If you are sure you have a compatible version of @babel/core, it is likely that something in your build process is loading the wrong version. Inspect the stack trace of this error tolook for the first entry that doesn't mention "@babel/core" or "babel-core" to see what is calling Babel.

  at throwVersionError (node_modules/@babel/helper-plugin-utils/lib/index.js:65:11)
  at Object.assertVersion (node_modules/@babel/helper-plugin-utils/lib/index.js:13:11)
  at _default (node_modules/@babel/plugin-proposal-decorators/lib/index.js:35:7)
  at node_modules/@babel/helper-plugin-utils/lib/index.js:19:12
  at Function.memoisePluginContainer (../../../node_modules/babel-core/lib/transformation/file/options/option-manager.js:113:13)      at Function.normalisePlugin (../../../node_modules/babel-core/lib/transformation/file/options/option-manager.js:146:32)      at ../../../node_modules/babel-core/lib/transformation/file/options/option-manager.js:184:30
      at Array.map (<anonymous>)
  at Function.normalisePlugins (../../../node_modules/babel-core/lib/transformation/file/options/option-manager.js:158:20)
  at OptionManager.mergeOptions (../../../node_modules/babel-core/lib/transformation/file/options/option-manager.js:234:36)
  at OptionManager.init (../../../node_modules/babel-core/lib/transformation/file/options/option-manager.js:368:12)
  at File.initOptions (../../../node_modules/babel-core/lib/transformation/file/index.js:212:65)
  at new File (../../../node_modules/babel-core/lib/transformation/file/index.js:135:24)
  at Pipeline.transform (../../../node_modules/babel-core/lib/transformation/pipeline.js:46:16)

这是我的package.json的样子：

{
  "name": "nanny-now",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "jest --verbose --runInBand",
    "test:watch": "npm run test -- --watch",
    "build": "babel src -d lib -s true",
    "start": "node lib/index.js",
    "start:watch": "nodemon src/index.js --exec babel-node"
  },
  "jest": {
    "testEnvironment": "node"
  },
  "repository": {
    "type": "git",
    "url": ""
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "@babel/cli": "^7.1.5",
    "@babel/core": "^7.2.0",
    "@babel/node": "^7.0.0",
    "@babel/plugin-proposal-class-properties": "^7.1.0",
    "@babel/plugin-proposal-decorators": "^7.1.6",
    "@babel/plugin-syntax-dynamic-import": "^7.0.0",
    "@babel/preset-env": "^7.1.6",
    "babel-eslint": "^10.0.1",
    "babel-jest": "^23.6.0",
    "chance": "^1.0.18",
    "eslint": "^5.9.0",
    "eslint-plugin-babel": "^5.3.0",
    "jest": "^23.6.0",
    "nodemon": "^1.18.7",
    "supertest": "^3.3.0"
  },
  "dependencies": {
    "bcryptjs": "^2.4.3",
    "dotenv": "^6.2.0",
    "express": "^4.16.4",
    "jsonwebtoken": "^8.4.0",
    "mongoose": "^5.3.14",
    "morgan": "^1.9.1",
    "regenerator-runtime": "^0.13.1"

} }

这是我的.babelrc文件：

{
  "presets": [
   "@babel/preset-env"
  ],
  "plugins": [
    [
      "@babel/plugin-proposal-decorators",
      {
        "decoratorsBeforeExport": true
      }
    ],
    "@babel/plugin-proposal-class-properties"
  ]
}

Answer 1

问题在于玩笑依赖性。我遇到了同样的问题，并通过将以下步骤添加到package.json文件中来解决了该问题

"scripts": {
  ...
  "postinstall": "rimraf node_modules/jest-runtime/node_modules/babel-core node_modules/jest-config/node_modules/babel-core",
  ...  
}

希望这会有所帮助。

Answer 2

正如George Artemiou所说的，发生此错误的原因是您在项目中使用Babel 7，而Jest仍在使用Babel 6。

我遇到了同样的问题，我通过安装babel-core@^7.0.0-bridge.0

解决了这个问题

另请参阅： https://github.com/babel/babel-bridge

持续的笑话错误：需要Babel“ ^ 7.0.0-0”，但已加载“ 6.26.3”

2 个答案: