Question

How to use class with event in Node.js

Answer 1

const EventEmitter = require('events');
const uuid = require('uuid');

class CID extends EventEmitter {
    log(msg) {
        this.emit('message', { id: uuid.v4(), msg:msg })
    }
}

const cid = new CID();

cid.on('message', (data) => console.log('Data:',  data));

cid.log('Node.js');
cid.log('C++');



/*
run:
     
Data: { id: '2bc104b3-bd64-4bae-9d86-a324b7b20b58', msg: 'Node.js' }
Data: { id: 'fcdcd8f5-5e3b-4a91-a865-d253370147af', msg: 'C++' }
   
*/

 

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