Nodejs tutorial let's create your first expressjs application with typescript

Express.js What is it?

Express.js, Or abbreviation Express, yes Node.js Back end application framework , stay MIT Released as free and open source software under license . It is designed for building Web Applications and API And Design . It is called Node.js The de facto standard server framework .

Core library

• express — This is what we will use to build api Of Node.js modular
• body-parser — Node.js Text parsing Middleware
• cors — This is a node.js package , For providing Connect / Express middleware , Can be used to enable... With a variety of options CORS .
• helmet — helmet It's a Node.js package , It sets various http Headers to help you protect your fast applications
• morgan — morgan It's a Node.js package , It can help us know who is talking to us express Application request api
• nodemon — nodemon It's a tool , Help develop node applications based on node.js Applications for .
• ts-node — ts-node It's a TypeScript Execution engine and Node.js Of REPL.
• typescript
• @types/express、@types/body-parser、@types/cors、@types/helmet、@types/morgan、- @types/node—— This package contains type definitions

Installation environment

well , Let's start by installing all the necessary packages

npm install express body-parser cors helmet morgan