Express Router文件存在TypeScript错误，求tsc 2.7.2版本解决方法

Hey there! I totally get how frustrating those module-related TypeScript errors can be—let's break down the most common fixes tailored to your version (2.7.2):

• Double-check your tsconfig.json module setting
  This is the #1 culprit for module errors. Your module value needs to match your runtime environment:

  • For Node.js projects, use "commonjs"
  • For browser projects with bundlers (like Webpack), use "es2015" or "es6"
    Example config snippet:

  {
    "compilerOptions": {
      "module": "commonjs" // Adjust based on your environment
    }
  }
  

• Be explicit with file extensions in imports
  TS 2.7.2 can be finicky about relative imports without extensions. Instead of import { utils } from './utils', use:

  // For source TS files
  import { utils } from './utils.ts';
  // Or for compiled JS files (if importing build output)
  import { utils } from './utils.js';
  

• Install missing type declarations
  If you see errors like "Cannot find module 'xyz'" when importing third-party packages, chances are you need the corresponding type definitions. Install them via npm:

  npm install @types/[package-name] --save-dev
  

  For example, if you're using Lodash: npm install @types/lodash --save-dev

• Validate baseUrl and paths (if using aliases)
  If you're using path aliases (like @/components), make sure your tsconfig.json has correct mappings. TS 2.7.2 supports this, but misconfigurations are common:

  {
    "compilerOptions": {
      "baseUrl": "./src",
      "paths": {
        "@/*": ["*"] // Maps @/xyz to ./src/xyz
      }
    }
  }
  

• Match export and import styles
  Mismatched export/import patterns often trigger errors:

  • If you use export default MyClass, import with import MyClass from './my-class'
  • If you use named exports (export const foo = 'bar'), import with import { foo } from './my-file'
    Avoid mixing default and named exports unless you explicitly handle both.

• Consider upgrading TypeScript (if possible)
  Version 2.7.2 is quite outdated (released in 2018), and many module parsing bugs have been fixed in newer versions. If your project dependencies allow it, upgrade to a stable newer version:

  npm install typescript@latest --save-dev
  

  Just be sure to test your code thoroughly after upgrading to catch any breaking changes.

内容的提问来源于stack exchange，提问作者Alexander Mills