Code Explainers

Code explainers tagged #event-emitter

javascript 
const express = require('express');
const EventEmitter = require('events');
 
const router = express.Router();

Server-Sent Events with Express

server-sent-events streaming event-emitter
Advanced 8 steps
typescript 
type EventMap = Record<string, unknown>;
 
type Handler<T> = (payload: T) => void;
 

A type-safe event bus in TypeScript

generics event-emitter type-safety
Advanced 7 steps
typescript 
type EventMap = Record<string, unknown[]>;
 
type Listener<Args extends unknown[]> = (...args: Args) => void;
 

A type-safe event emitter in TypeScript

generics mapped-types event-emitter
Advanced 8 steps