Wijmo 5 - Freezing Handle

HTML

<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<link rel="stylesheet" href="http://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css">
<script src="https://cdn.grapecity.com/wijmo/5.20181.436/controls/wijmo.min.js"></script>
<link rel="stylesheet" href="https://cdn.grapecity.com/wijmo/5.20181.436/styles/wijmo.min.css">
<script src="https://cdn.grapecity.com/wijmo/5.20181.436/controls/wijmo.grid.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.3.15/angular.min.js"></script>
<script src="https://cdn.grapecity.com/wijmo/5.20181.436/interop/angular/wijmo.angular.min.js"></script>
<!-- mark this as an Angular application and give it a controller -->
<div ng-app="app" ng-controller="appCtrl">
    
<h1>Frozen columns and Safari</h1>

    <p>Flickering columns if cells arent cloned; Angular bindings fail if true. HELP!</p>
    <wj-flex-grid
        control="grid"
        style="width:100%;height:100%"
        items-source="data"
        selection-mode="Row"
        frozen-columns="3"
        initialized="initGrid(s,e)">
        <wj-flex-grid-column binding="country">
            <wj-flex-grid-cell-template cell-type="Cell">
              <button ng-click="onClick($item.country);" class="clickThis">
                {{ $item.country }}
              </button>
            </wj-flex-grid-cell-template>
        </wj-flex-grid-column>
        <wj-flex-grid-column binding="downloads"></wj-flex-grid-column>
        <wj-flex-grid-column binding="sales"></wj-flex-grid-column>
        <wj-flex-grid-column binding="expenses"></wj-flex-grid-column>
        <wj-flex-grid-column binding="country"></wj-flex-grid-column>
        <wj-flex-grid-column binding="downloads"></wj-flex-grid-column>
        <wj-flex-grid-column binding="sales"></wj-flex-grid-column>
        <wj-flex-grid-column binding="expenses"></wj-flex-grid-column>
        <wj-flex-grid-column binding="country"></wj-flex-grid-column>
   ...

JavaScript

// define app, include Wijmo 5 directives
var app = angular.module('app', ['wj']);

// controller
app.controller('appCtrl', function ($scope) {

    // create some random data
    var countries = 'US,Germany,UK,Japan,Italy,Greece'.split(','),
        data = [];
    for (var i = 0; i < 600; i++) {
        data.push({
            country: countries[i % countries.length],
            downloads: Math.round(Math.random() * 20000),
            sales: Math.random() * 10000,
            expenses: Math.random() * 5000
        });
    }
    
    /* $scope.onClick = function(country) {
      alert("Welcome to "+country+". You'll never see me.");
    }; */
    
    function runOnClick(country){
    	alert("Welcome to "+country+". You'll see me now.");
    }
    
    $scope.initGrid = function(s,e) {
    	s.cloneFrozenCells = true;
      
      s.hostElement.addEventListener('click',(e)=>{
      	if(e.target.tagName=="BUTTON" && e.target.classList.contains('clickThis')){
        	var ht=s.hitTest(e);
          var rowData=s.rows[ht.row].dataItem;
          var cellData=s.getCellData(ht.row,ht.col);
          var colBinding=s.columns[ht.col].binding;
          runOnClick(cellData);
          console.log('row',rowData);
          console.log('cellD',cellData);
          console.log('colB',colBinding);
          console.log('hitTest',ht);
        }
      });
      
    }

    // expose data as a CollectionView to get events
    $scope.data = new wijmo.collections.CollectionView(data);
   
});