问此模块使用“This =”声明，并且只能在使用“esModuleInterop”标志时用于默认导入。

EN

    {
  "name": "API-Proyecto",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "dependencies": {
    "cors": "^2.8.5",
    "express": "^4.17.1",
    "jsonwebtoken": "^8.5.1"
  },
  "devDependencies": {
    "@types/cors": "^2.8.6",
    "@types/express": "^4.17.6",
    "nodemon": "^2.0.4"
  }
}

    import express from 'express';
import { Request, Response }  from 'express';
import cors from 'cors';

const app = express();

app.use(express.urlencoded({extended: true}));
app.use(express.json);
app.use(cors({origin: true, credentials: true}));

app.get('/api/auth/testing', (req: Request, res: Response) =>{
    res.status(200).json({
        ok : true,
        msg : 'hi from my method'
    });
});

app.listen(3000, () => {console.log('Server running on 3000' )});

    {
  "compilerOptions": {
    "target": "es6",                          /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019', 'ES2020', or 'ESNEXT'. */
    "module": "commonjs",                     /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', 'es2020', or 'ESNext'. */
    "outDir": "./dist",                        /* Redirect output structure to the directory. */
    "esModuleInterop": true,                  /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */
  }
}