angularjs - Native method URL.createObjectURL not working in Angular 1.5 -

i'm running angular 1.5.7.

simple example on jsfiddle works, in real application error:

angular.js:13708 typeerror:

failed execute 'createobjecturl' on 'url': no function found matched signature provided.

at typeerror (native)  @ downloadcsv (http://localhost/js/dashboard.js:286:35)  @ fn (eval @ compile (http://localhost/node_modules/angular/angular.js:14605:15), anonymous:4:267)  @ expensivecheckfn (http://localhost/node_modules/angular/angular.js:15694:18)  @ callback (http://localhost/node_modules/angular/angular.js:25622:17)  @ scope.$eval (http://localhost/node_modules/angular/angular.js:17444:28)  @ scope.$apply (http://localhost/node_modules/angular/angular.js:17544:25) 

as can see, error happens inside eval.

what in real application calling function on ng-click:

    this.downloadcsv = function () {         //...         console.log(url.createobjecturl);         var url = url.createobjecturl(chart.csvblob);     }; 

an interesting thing code produces valid console.log

function () { [native code] }

but fails run method.

strange, happened because chart.cvsblob undefined. confused error messages told me.