javascript - Node.js Recursive Loop fail -

below node.js script. downloads images contained in div. loop works fine 9.86% upto id = 36. when id > 36 exits loop. using node 0.12 version. loop needs run 365 times before completion. usign method of recursive callback.

code:

//required modules var fs = require('fs'),          cheerio = require('cheerio'),          request = require('request');  //default variables var baseuri =  'http://www.website/'; var year = 2013; var id = 1; var savepath = process.argv[2];   //download function var download = function(uri, filename, callback){     request({ uri: uri }, function(err, res, body){         var $ = cheerio.load(body);     var imgdiv = $('#img-wallpaper').children()['0'];     if(err)         console.err(err);     if(typeof imgdiv !== 'undefined') {     request(imgdiv.attribs.src).pipe(fs.createwritestream(filename)).on('close', callback);}     }); };    //main function console.log("downloading . . .");  // loop function create recursive effect (function loop(){     download(baseuri+year+'/'+id+'/wallpaper/', savepath+id+'.jpg',      function(){         console.log(((id/365)*100).tofixed(2)+'% completed');         if(id == 330)              year = "2014";         if(((id/365)*100) != 100){             id=id+1;             loop();}         }); })(1) 

do understand correctly if set starting value id more 35 (36?) script not downloaded images?

test script on fixed uri , on fixed image changing variables. script expected work out? if case:

• or not called callback body request
• or false condition typeof imgdiv !== 'undefined'
• or not called callback request image

thus, when error in 1 of these points script stops working. necessary change severity of conditions.