TypeScript Declaration file for Node.js package (server-timings) https://github.com/remy/server-timings

index.d.ts

/// <reference  types="node" />

declare module 'server-timings' {
    import { RequestHandler, Request, Response, NextFunction } from 'express';

    function ServerTimings(req: Request, res: Response, next: NextFunction): any;

    module ServerTimings {
        /**
         * Record the start time
         */
        export function start(label: string): void;

        /**
         * End the record time - if this isn't called, it will be called when the request is finished
         */
        export function end(label: string): void;
    }

    export = ServerTimings;
}

server-timings.js

// `server-timings` node package file
// https://github.com/remy/server-timings

module.exports = (req, res, next) => {
  ...
};

module.exports.start = opts => (req, res, next) => {
  res.locals.timings.start(opts);
  next();
};

module.exports.end = opts => (req, res, next) => {
  res.locals.timings.end(opts);
  next();
};

usage.ts

import * as express from 'express';
import * as timings from 'server-timings';

const app = express();
app.use(timings);
app.use(function (req, res, next) {
  timings.start('Begin');    
  
  // Do something
  
  timings.end('End');
});