javascript - CasperJS bind issue -

i'm trying reach instagram page, no luck. keep getting error , blank screenshot.

error text:

typeerror: 'undefined' not function (evaluating 'a.createdescriptor.bind(null,t)') 

casperjs --version 1.1.0-beta3.

basically use following code:

var casper = require('casper').create({     verbose: true,     loglevel: 'debug',     pagesettings: {          useragent: 'mozilla/5.0 (macintosh; intel mac os x 10_7_5) applewebkit/537.4 (khtml, gecko) chrome/22.0.1229.94 safari/537.4'     },     loadplugins: true });  casper.on( 'page.error', function (msg, trace) {     this.echo( 'error: ' + msg, 'error' ); });  casper.start('http://instagram.com/hello', function() {     casper.wait(3000, function()  {         this.capture('screen.png');     }); });  casper.run(function() {     this.exit(); }); 

the shim below isn't needed anymore if phantomjs 2 used. sadly casperjs 1.1-beta3 doesn't support yet, might want use master branch github.

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the problem phantomjs v1.x not support function.prototype.bind. need add shim that. in casperjs goes page.initialized event handler. this shim works me on instragram:

casper.on( 'page.initialized', function(){     this.evaluate(function(){         var isfunction = function(o) {           return typeof o == 'function';         };          var bind,           slice = [].slice,           proto = function.prototype,           featuremap;          featuremap = {           'function-bind': 'bind'         };          function has(feature) {           var prop = featuremap[feature];           return isfunction(proto[prop]);         }          // check missing features         if (!has('function-bind')) {           // adapted mozilla developer network example @           // https://developer.mozilla.org/en/javascript/reference/global_objects/function/bind           bind = function bind(obj) {             var args = slice.call(arguments, 1),               self = this,               nop = function() {               },               bound = function() {                 return self.apply(this instanceof nop ? : (obj || {}), args.concat(slice.call(arguments)));               };             nop.prototype = this.prototype || {}; // firefox cries if prototype undefined             bound.prototype = new nop();             return bound;           };           proto.bind = bind;         }     }); }); 

it doesn't work if shim exported own file , included through clientscripts option, because appended after instagram javascript late.

what might work registering page.resource.received event.

there pure phantomjs question: bind polyfill phantomjs