title: Sunburst chart in angular
body: <p>Hi I am using Highchart for sunburst chart, But getting errors, I am not able to get what is wrong in my code, so please help me.</p>
  
  <p>My HTML code is :</p>
  
  <pre><code>&lt;highcharts-chart
      [Highcharts]="highcharts1"
      [options]="chartOptions1"
      style="width: 100%; height: 200px; display: block;"&gt;
    &lt;/highcharts-chart&gt;
  </code></pre>
  
  <p>and Ts code is</p>
  
  <pre><code>chartData = [
          {
              id: '2.13',
              parent: '1.3',
              name: 'Southern Asia'
          }
          ];
   highcharts1: typeof Highcharts = Highcharts;
      chartOptions1: Highcharts.Options = &lt;any&gt; {
          chart: {
              height: '100%'
          },
          title: {
              text: 'World population 2017'
          },
          subtitle: {
              text: 'Source &lt;href="https://en.wikipedia.org/wiki/List_of_countries_by_population_(United_Nations)"&gt;Wikipedia&lt;/a&gt;'
          },
          series: [{
              type: "sunburst",
              data: this.chartData,
              allowDrillToNode: true,
              cursor: 'pointer',
              dataLabels: {
                  format: '{point.name}',
                  filter: {
                      property: 'innerArcLength',
                      operator: '&gt;',
                      value: 16
                  }
              },
              levels: [{
                  level: 1,
                  levelIsConstant: false,
                  dataLabels: {
                      filter: {
                          property: 'outerArcLength',
                          operator: '&gt;',
                          value: 64
                      }
                  }
              }, {
                  level: 2,
                  colorByPoint: true
              },
              {
                  level: 3,
                  colorVariation: {
                      key: 'brightness',
                      to: -0.5
                  }
              }, {
                  level: 4,
                  colorVariation: {
                      key: 'brightness',
                      to: 0.5
                  }
              }]
  
          }]
      };
  
  </code></pre>
  
  <p>" 
  getting the below error.
   ERROR Error: Highcharts error #17: www.highcharts.com/errors/17
      at c.Chart.h (highcharts.js:12) " 
  Can anyone help me what i am missing in my code</p>