node.js - Initializing jquery from Node -

i creating new project using following:

$mkdir x $cd x $npm install jquery 

then create new app.js file:

var http = require('http'); var $ = require('jquery'); console.log("http="+ http); console.log("$="+ $); console.log("$.getjson="+ $.getjson); 

output is:

http=[object object] $=function ( w ) {...} $.getjson=undefined 

why $.getjson undefined ? using latest io.js v2.4.0.

you trying create xhr within node.js. not going work since node.js javascript runtime , not same browser.

if want fetch somewhere on http protocol, can use request. example (from official docs):

var request = require('request'); request('http://www.google.com', function (error, response, body) {   if (!error && response.statuscode == 200) {     console.log(body) // show html google homepage.    } }) 

you can take @ this answer (also me) more information on using jquery in combination node.js.

update[d again!]:

so wanted know how jquery node module differentiates between browser , node environment? when require jquery inside commonjs or similar environment provide module , module.exports, factory , not actual jquery object. can see below, factory can used create jquery object, i.e. using jsdom:

let jsdom = require("jsdom"); let $ = null;  jsdom.env(   "http://quaintous.com/2015/07/31/jquery-node-mystery/",   function (err, window) {     $ = require('jquery')(window);   } ); 

here how jquery differentiates between browser , io.js (or node.js):

(function( global, factory ) {      if ( typeof module === "object" && typeof module.exports === "object" ) {         // commonjs , commonjs-like environments proper `window`         // present, execute factory , jquery.         // environments not have `window` `document`         // (such node.js), expose factory module.exports.         // accentuates need creation of real `window`.         // e.g. var jquery = require("jquery")(window);         // see ticket #14549 more info.         module.exports = global.document ?             factory( global, true ) :             function( w ) {                 if ( !w.document ) {                     throw new error( "jquery requires window document" );                 }                 return factory( w );             };     } else {         factory( global );     }  // pass if window not defined yet }(typeof window !== "undefined" ? window : this, function( window, noglobal ) {   // implementation    return jquery; })); 

i use jquery's npm package meant custom builds rather used require!

update:

i had feeling subject happens keep devs busy, combined couple of own answers , wrote an article whole jquery/node combination!