angularjs - how to call function outside of javascript file -


i calling 1 function ng-change in html , in controller
html

ng-change="valueset(selectedaddress);"

function inside controller 

  $scope.valueset=function(val){         globalvar=val.latitude;         sessionstorage.setitem('latitude',globalvar);         console.log('setting globalvar'+sessionstorage.getitem('latitude'));     }

javascript file 

window.gs.prototype.jsfunction = function(){ var city= new ol.feature({   geometry: new ol.geom.point(                              ol.proj.fromlonlat(                                     [4.342342,                                      parseint(sessionstorage.getitem('latitude'))                                     ]))    }); }

in javascript file when calling sessionstorage.getitem('latitude') getting value first time want change value in javascript file whenever input value change. have defined global variable out of controller globalvar="";


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