Question

19

NodeJS EventEmitter with TypeScript class

rated 0 times [ 25] [ 6] / answers: 1 / hits: 30897 / 9 Years ago, sun, november 15, 2015, 12:00:00

Is it possible to use NodeJS' events.EventEmitter with a TypeScript class? If yes, how?

I've tried countless variations in the last hours to get this working, so I won't list any of them.

What I basically want to do:

export class Database{

    constructor(cfg:IDatabaseConfiguration) {

        // events.EventEmitter.call(this); 

        mongoose.connect(cfg.getConnectionString(), cfg.getCredentials(), function (err:any) {

            if (err)

                this.emit('error', err);

            else

                this.emit('ready');

        });

    }

}

Answers

Only authorized users can answer the question. Please sign in first, or register a free account.

daijab

Add To Favorites

Follow

Total Points: 60

Total Questions: 99

Total Answers: 110

Location: Bosnia and Herzegovina

Member since Thu, Jun 24, 2021

3 Years ago

answered 9 Years ago minab · Accepted Answer

You should download node typings:

$ tsd install node --save

and then just use the following code:

///<reference path=./typings/node/node.d.ts />

import events = require('events');



class Database{

    constructor() {

        events.EventEmitter.call(this);

    }

}

I simplified it to test your main problem.

Edit: Modified based on your comment:

///<reference path=./typings/node/node.d.ts />

import events = require('events');



class Database extends events.EventEmitter {

    constructor() {

        super();

        this.emit('ready');

    }

}



new Database();