javascript - Node js file execution -

i having sample node js file executed in command prompt, but, not coming in browser,

var http = require('http'); port = process.argv[2] || 8888; http.createserver(function(request,response){     response.writehead(200, { 'content-type': 'text/html' }); var pi = math.pi; exports.area = function (r) {     var res1 = pi * r * r;     response.end(res1, 'utf-8');    // alert(res1);     return res1; }; exports.circumference = function (r) {     var res2 = 2 * pi * r;     response.end(res2, 'utf-8');     //alert(res2);     return res2; };  }).listen(parseint(port, 10)); console.log("file server running at\n => hostname " + port + "/\nctrl + c shutdown"); 

strong text can anyone, please tell me have done mistake

the problem not writing response of request.

response.write()

also using methods alert(); browser methods, code run executed in server side.

currently declare methods not call out anything.

this example should work:

var http = require('http'); port = process.argv[2] || 8888;   http.createserver(function(request, response) {     response.writehead(200, {         'content-type': 'text/html'     });      var pi = math.pi;     area = function(r) {         var res1 = pi * r * r;         response.write('area = ' + res1);         // alert(res1);         return res1;     };     circumference = function(r) {         var res2 = 2 * pi * r;         response.write('circumference = ' +res2);         //alert(res2);         return res2;     };      area(32);     response.write(' ');     circumference(23);     response.end();  }).listen(parseint(port, 10)); console.log("file server running at\n => hostname " + port + "/\nctrl + c shutdown");