Definitelytyped: @types/express, @types/express-serve-static-core -- Basic server fails. 'Argument of type '"/api"' is not assignable to parameter of type 'RequestHandlerParams'.

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  • Authors: @borisyankov
  
  

Code:

import * as express from "express";
import { Request, Response } from "express";
import * as bodyParser from "body-parser";
import * as api from "./routes/api";

namespace my_api  {
    let app = express();
    let port: number = process.env.port || 3000;
    app.use(bodyParser.json());
    app.use('/api', api);
    app.get('/', (req: Request, res: Response) => {
           res.send("Hello world");
    });

    app.listen(port, () => console.log(`Express app listening on port ${port}`);
}

When building:

ERROR in /path/to/server.ts (25,11): Argument of type '"/api"' is not assignable to parameter of type 'RequestHandlerParams'.

Related:
expressjs/express#3263