AngularJS 1.4.x HighChart

//See: https://github.com/pablojim/highcharts-ng
var myapp = angular.module('myapp', ["highcharts-ng"]);

myapp.controller('myctrl', function ($scope) {

    $scope.addPoints = function () {
        var seriesArray = $scope.chartConfig.series
        var rndIdx = Math.floor(Math.random() * seriesArray.length);
        seriesArray[rndIdx].data = seriesArray[rndIdx].data.concat([1, 10, 20])
    };

    $scope.addSeries = function () {
        var rnd = []
        for (var i = 0; i < 10; i++) {
            rnd.push(Math.floor(Math.random() * 20) + 1)
        }
        $scope.chartConfig.series.push({
            data: rnd
        })
    }

    $scope.removeRandomSeries = function () {
        var seriesArray = $scope.chartConfig.series
        var rndIdx = Math.floor(Math.random() * seriesArray.length);
        seriesArray.splice(rndIdx, 1)
    }

    $scope.swapChartType = function () {
        if (this.chartConfig.options.chart.type === 'line') {
            this.chartConfig.options.chart.type = 'bar'
        } else {
            this.chartConfig.options.chart.type = 'line'
            this.chartConfig.options.chart.zoomType = 'x'
        }
    }

    $scope.toggleLoading = function () {
        this.chartConfig.loading = !this.chartConfig.loading
    }

    $scope.chartConfig = {
        options: {
            chart: {
                type: 'bar'
            }
        },
        series: [{
            data: [10, 15, 12, 8, 7]
        }],
        title: {
            text: 'Hello'
        },

        loading: false
    }

});

<!DOCTYPE html>
<html>

  <head>
    <meta charset="utf-8" />
    <title>AngularJS Plunker</title>
    <script>document.write('<base href="' + document.location + '" />');</script>
    <link rel="stylesheet" href="style.css" />
    <script data-require="angular.js@1.4.x" src="https://code.angularjs.org/1.4.9/angular.js" data-semver="1.4.9"></script>
<script src="http://code.highcharts.com/highcharts.js"></script>
<script src="https://rawgit.com/pablojim/highcharts-ng/master/src/highcharts-ng.js"></script>
    <script src="app.js"></script>
  </head>

  <body>
   <div ng-app="myapp">
    <div ng-controller="myctrl">
        <div class="span12">
            <input ng-model="chartConfig.title.text">
            <button ng-click="addSeries()">Add Series</button>
            <button ng-click="addPoints()">Add Points to Random Series</button>
            <button ng-click="removeRandomSeries()">Remove Random Series</button>
            <button ng-click="swapChartType()">Line/Bar</button>
            <button ng-click="toggleLoading()">Loading?</button>
        </div>
        <div class="row">
            <highchart id="chart1" config="chartConfig" class="span10"></highchart>
        </div>
    </div>
</div>
  </body>

</html>

/* Put your css in here */