错误：tslib 的包导出未定义有效的“.” 目标

Question

我真的没有对代码进行任何更改，有一天我突然意识到这个错误，

backend: internal/modules/cjs/loader.js:454
backend:   const e = new Error(`Package exports for '${basePath}' do not define a ` +
backend:             ^
backend: Error: Package exports for '/Users/kumarabhirup/Documents/Repositories/propagateAt/node_modules/tslib' do not define a valid '.' target
backend:     at resolveExportsTarget (internal/modules/cjs/loader.js:454:13)
backend:     at resolveExports (internal/modules/cjs/loader.js:387:16)
backend:     at Function.Module._findPath (internal/modules/cjs/loader.js:486:20)
backend:     at Function.Module._resolveFilename (internal/modules/cjs/loader.js:781:27)
backend:     at Function.Module._load (internal/modules/cjs/loader.js:687:27)
backend:     at Module.require (internal/modules/cjs/loader.js:849:19)
backend:     at require (internal/modules/cjs/helpers.js:74:18)
backend:     at Object.<anonymous> (/Users/kumarabhirup/Documents/Repositories/propagateAt/node_modules/apollo-link/lib/index.js:3:15)
backend:     at Module._compile (internal/modules/cjs/loader.js:956:30)
backend:     at Object.Module._extensions..js (internal/modules/cjs/loader.js:973:10) {
backend:   code: 'MODULE_NOT_FOUND'
backend: }
backend: [nodemon] app crashed - waiting for file changes before starting...

来自另一个 StackOverflow 问题的这个人更改了他们的节点版本并且对他们有用，我也尝试过（v12.xx -> v15.xx），但对我不起作用。

我也升级了typescript，尝试安装tslib，做了yarn cache clean，删除并重新安装了 node_modules，删除了yarn.lock，没有任何效果。

请帮忙。

这是我的package.json：

backend: internal/modules/cjs/loader.js:454
backend:   const e = new Error(`Package exports for '${basePath}' do not define a ` +
backend:             ^
backend: Error: Package exports for '/Users/kumarabhirup/Documents/Repositories/propagateAt/node_modules/tslib' do not define a valid '.' target
backend:     at resolveExportsTarget (internal/modules/cjs/loader.js:454:13)
backend:     at resolveExports (internal/modules/cjs/loader.js:387:16)
backend:     at Function.Module._findPath (internal/modules/cjs/loader.js:486:20)
backend:     at Function.Module._resolveFilename (internal/modules/cjs/loader.js:781:27)
backend:     at Function.Module._load (internal/modules/cjs/loader.js:687:27)
backend:     at Module.require (internal/modules/cjs/loader.js:849:19)
backend:     at require (internal/modules/cjs/helpers.js:74:18)
backend:     at Object.<anonymous> (/Users/kumarabhirup/Documents/Repositories/propagateAt/node_modules/apollo-link/lib/index.js:3:15)
backend:     at Module._compile (internal/modules/cjs/loader.js:956:30)
backend:     at Object.Module._extensions..js (internal/modules/cjs/loader.js:973:10) {
backend:   code: 'MODULE_NOT_FOUND'
backend: }
backend: [nodemon] app crashed - waiting for file changes before starting...

这是我的tsconfig.json：

{
  "name": "backend",
  "version": "1.0.0",
  "license": "ISC",
  "main": "dist/src/index.js",
  "scripts": {
    "build": "tsc -p tsconfig.release.json",
    "build:watch": "tsc --watch -p tsconfig.release.json",
    "start": "npm run build && node --experimental-modules --experimental-json-modules --es-module-specifier-resolution=node dist/src/index.js",
    "start:pm2": "NODE_ENV=production pm2 start dist/src/index.js --node-args=\"--max_old_space_size=500 --experimental-modules --experimental-json-modules --es-module-specifier-resolution=node\"",
    "dev": "npm run build && concurrently --raw \"nodemon --experimental-modules --experimental-json-modules --es-module-specifier-resolution=node dist/src/index.js\" \"npm run build:watch\"",
    "lint": "eslint . --ext js,jsx,ts,tsx",
    "lint:fix": "eslint . --fix --ext js,jsx,ts,tsx",
    "test": "NODE_ENV=test jest --passWithNoTests --watch",
    "test:ci": "NODE_ENV=test jest --passWithNoTests"
  },
  "devDependencies": {
    "@types/bull": "^3.14.0",
    "@types/mongoose": "^5.5.43",
    "@types/node": "^12.7.3",
    "@types/node-cron": "^2.0.2",
    "@types/nodemailer": "^6.4.0",
    "concurrently": "^5.1.0",
    "eslint": "^6.8.0",
    "eslint-config-airbnb-typescript-prettier": "^2.1.0",
    "nodemon": "^1.19.1",
    "pm2": "^4.4.0",
    "prettier": "^1.18.2",
    "tslib": "^2.0.3",
    "typescript": "^3.7.0",
    "typings": "^2.1.1"
  },
  "dependencies": {
    ...
    "tslib": "^2.0.3",
    ...
  },
  "engines": {
    "node": ">=12.x"
  },
  "resolutions": {
    "graphql": "14.x"
  }
}

这是我的tsconfig.release.json：

{
  "compilerOptions": {
    "target": "es2019",
    "module": "commonjs",
    "moduleResolution": "node",
    "allowSyntheticDefaultImports": true,
    "allowJs": true,
    "importHelpers": true,
    "alwaysStrict": true,
    "sourceMap": true,
    "forceConsistentCasingInFileNames": true,
    "noFallthroughCasesInSwitch": true,
    "noImplicitReturns": true,
    "noUnusedLocals": true,
    "noUnusedParameters": true,
    "noImplicitAny": false,
    "noImplicitThis": false,
    "strictNullChecks": false,
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "resolveJsonModule": true,
    // "lib": ["es2017"],
    "types": ["jest"]
  },
  "include": ["src/**/*", "__tests__/**/*"],
  "paths": {
    "tslib" : ["node_modules/tslib/tslib.d.ts"]
  },
}

谢谢！

Answer 1

我有一个类似的问题，我通过降级节点版本（从 v13.0.1 到 v12.19.0）来解决。这可能不是理想的解决方案，但它可以帮助您在寻找最终解决方案的同时解除封锁。

我使用nvm for windows来管理节点版本。

我给你留下了问题和解决方案的截图。

我希望它有助于解决您的问题。

问候！

Answer 2

对我来说，这些步骤成功了：

1. 降级到最新NodeJS稳定版本：nvm install --lts
2. 删除/node_modules和package-lock.json文件
3. 终止 pm2 进程并再次添加：pm2 kill和pm2 start process.json

诀窍实际上是杀死 pm2 并再次添加该进程。祝你好运！