JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://cdn.wijmo.com/5.20142.15/controls/wijmo.min.js"></script>
<link rel="stylesheet" href="http://cdn.wijmo.com/5.20142.15/styles/wijmo.min.css">
<script src="http://cdn.wijmo.com/5.20142.15/controls/wijmo.chart.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.1/angular.min.js"></script>
<script src="http://cdn.wijmo.com/5.20142.15/interop/angular/wijmo.angular.min.js"></script>
<div ng-app="app" ng-controller="appCtrl">
    <wj-flex-chart items-source="data" item-formatter="itemFormatter" binding-x="country">
        <wj-flex-chart-series name="Sales" binding="sales"></wj-flex-chart-series>
    </wj-flex-chart>
</div>

JavaScript

// declare app module                            
 var app = angular.module('app', ['wj']);

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

     // generate some random data
     var countries = 'US,Germany,UK,Japan,Italy,Greece'.split(','),
         data = [];
     for (var i = 0; i < countries.length; i++) {
         data.push({
             country: countries[i],
             downloads: Math.round(Math.random() * 20000),
             sales: Math.random() * 10000,
             expenses: Math.random() * 5000
         });
     }

     // add data array to scope
     $scope.data = data;


     var defaultColor;
     $scope.itemFormatter = function (engine, hitTestInfo, defaultFormat) {

         if (!defaultColor) defaultColor = engine.fill;

         if (hitTestInfo.chartElement == wijmo.chart.ChartElement.SeriesSymbol) {
             //check for specific bar using value property of hitTestInfo object
             //change of color of bars having value greater than 5000
             if (hitTestInfo.value < 5000) engine.fill = get_random_color();
             else engine.fill = defaultColor;

             defaultFormat();
         }
     };

     function get_random_color() {
         function c() {
             return Math.floor(Math.random() * 256).toString(16)
         }
         return "#" + c() + c() + c();
     }
 });