✳flâneur — a map of the web's best reading

Express 4.x - API Reference

expressjs.com · 253 words · saved by 1 readers

Creates an Express application. The express() function is a top-level function exported by the express module. This middleware is available in Express v4.16.0 onwards. This is a built-in middleware function in Express. It parses incoming requests with JSON payloads and is based on body-parser. Returns middleware that only parses JSON and only looks at requests where the Content-Type header matches the type option. This parser accepts any Unicode encoding of the body and supports automatic inflation of gzip and deflate encodings. A new body object containing the parsed data is populated on the request object after the middleware (i.e. req.body), or an empty object ({}) if there was no body to parse, the Content-Type was not matched, or an error occurred. As req.body’s shape is based on user-controlled input, all properties and values in this object are untrusted and should be validated before trusting. For example, req.body.foo.toString() may fail in multiple ways, for example foo may n

4.x API Reference This section provides an overview of the modules and APIs available in Express 4.x for building web applications and HTTP services. CommonJS ESM TypeScript index.cjs var express = require ( 'express' ); var app = express (); app. get ( '/' , function ( req , res ) { res. send ( 'hello world' ); }); app. listen ( 3000 ); index.mjs import express from 'express' ; const app = express (); app. get ( '/' , function ( req , res ) { res. send ( 'hello world' ); }); app. listen ( 3000 ); index.ts import express, { type Express, type Request, type Response } from 'express' ; const app

Explore this link on the map →

related reading