This is the bare minimum cheatsheet to get express.js up and running.

• Download and install node.js fromhttps://nodejs.org/en/download/
• Open terminal or commandline
• Creat a project directory and change to it
• Run terminal command:npm init (accept all defaults by pressing enter)
  • This will create package.json file, which has basic project configuration
• Run terminal command:npm i express
  • This installs express.js
• Run terminal command:npm i -g nodemon
  • Installs node monitor, which will make sure server is restared on file saves
• Create new fileindex.js (which is referenced in the package.json file created above)
• Add the following starter code to index.js, which is the bare minimum to get it going:

constexpress=require('express')constapp=express()constport=3000app.get('/',(req,res)=>res.send('Hello World!'))app.listen(port,()=>console.log(`Example app listening on port${port}!`))

• Run terminal command:node index.js to run it
• or run terminal command:nodemon index.js to run it via nodemon - this will ensure that server is restarted automatically whenever there is a file change
• Openlocalhost:3000 to view in browser - should show:Hello World!