Learning MEAN Stack: Express JS - 101
 
  M E AN   Express JS is a web framework which makes it easier to build a web server in Node JS.   Express helps in writing the NodeJS code cleanly.   Installation    npm install express - - save     Building and running HTML on a web server    No need to mention header with Content-Type etc. like done before in nodejs.    var  express =  require ( 'express' ) ;   var  app =  express ( ) ;   app . get ( '/' ,  function ( req , res ) {  res . send ( '<html><head></head><body><h1>Hello Sarthak, Welcome to express!</h1></body></html>' )  } ) ;  app . listen ( 3000 ) ;     run as > nodemon file.js        2.   Using it to build a API.    var  express =  require ( 'express' ) ;   var  app =  express ( ) ;   app . get ( '/api' ,  function ( req , res ) {       res . json ( { firstname :  'Sarthak' ,  lastname :  'Srivastava' } )  } ) ;  app . listen ( 3000 ) ;       Send request to   loc...