TypeScript path aliases in tsconfig.json not found-CodePudding

The user defined paths in tsconfig.json are not found – TypesScript says … I have reinitialized the whole project. Used stock ts configs, checked every setting, updated everything. It just don't want to work.

Project structure:

|-./
|--index.ts
|--package.json
|--tsconfig.json
|--database/
|---dbOperations/
|----index.ts
|--api/
|---server.ts

package.json:

{
  "name": "name",
  "version": "0.1.0",
  "private": true,
  "description": "desc.",
  "main": "index.ts ",
  "scripts": {
    "test": "jest --config jest.config.json",
    "tsnode": "ts-node index.ts",
    "lint": "eslint '**/*.ts' --ignore-pattern node_modules/",
  },
  "license": "ISC",
  "devDependencies": {
    "@babel/core": "^7.15.0",
    "@babel/preset-env": "^7.15.0",
    "@babel/preset-typescript": "^7.15.0",
    "@types/cors": "^2.8.12",
    "@types/express": "^4.17.13",
    "@types/jest": "^27.0.1",
    "@typescript-eslint/eslint-plugin": "^4.32.0",
    "@typescript-eslint/parser": "^4.32.0",
    "eslint": "^7.32.0",
    "jest": "^27.1.0",
    "nodemon": "^2.0.12",
    "ts-jest": "^27.0.5",
    "ts-node": "^10.1.0",
    "typescript": "^4.3.5"
  },
  "dependencies": {
    "express": "^4.17.1",
  }
}

tsconfig.json (initial config after tsc --init with paths):

{
  "compilerOptions": {
    "strict": true,
    "target": "es5",
    "module": "commonjs",
    "esModuleInterop": true,
    "skipLibCheck": true,
    "forceConsistentCasingInFileNames": true,
    "baseUrl": ".",
    "paths": {
      "@app/*": [
        "./*"
      ],
      "@api/*": [
        "api/*"
      ],
      "@database/*": [
        "database/*"
      ],
      "@dbOperations": [
        "database/dbOperations/index.ts"
      ]
    },
  }
}

When I do import {x, y, z} from "@dbOperations" in /api/server.ts it won't work.

tsnode throws:

Error: Cannot find module '@dbOperations'

Any suggestions?

CodePudding user response：

TypeScript only uses paths defined in tsconfig.json when compiling, but it doesn't actually output valid paths that are understandable for Node. You have to install tsconfig-paths to make it work.