javascript simple web app state reflection using location - QueryStringSettings

QueryStringSettings.js

var QueryStringSettings = {
	  selector: '[ng-model]:not([type="checkbox"])',
	  doneCallback: null,
    set: function() {
        var h = '';
        [].forEach.call(document.querySelectorAll(this.selector), function(e) {
            h += ((h !== '') ? '/' : '') + e.id + '=' + e.value;
        });
        document.location.hash = h;
        if (this.doneCallback!==null) {
        		this.doneCallback.call(this, 'set', h);
        }
    },
    get: function(scope) {
    	// scope is the object containing the web app settings
    	// made to integrate with AngularJS
    	var settings = [];
      [].forEach.call(location.hash.split('/'), function(e) {
          var a = e.split('=');
          if (a.length === 2) {
           settings.push(a);
          	if (typeof scope==='undefined') {
          		document.querySelector('#' + a[0]).value = a[1];
          	} else {
          		scope[a[0]] = a[1];
          	}
        	}
      });
      if (this.doneCallback!==null) {
        		this.doneCallback.call(this, 'get', settings);
      }
    }
};