title: How to use an Addon with ChartJS on Angular 4
body: <p>I'm trying to use PieceLabel addon to show the labels inside the graphics but it's not working. The graphic is showing ok, here's my code:</p>
  
  <p><strong>TS</strong></p>
  
  <pre><code>import * as Chart from 'chart.js'
  import * as ChartPiece from 'chart.piecelabel.js'
  
  ngAfterViewInit() {
    this.canvas2 = document.getElementById('myChartPie');
    this.ctx2 = this.canvas2.getContext('2d');
    let myChartPie = new Chart(this.ctx2, {
      type: 'pie',
      data: {
          labels: ["one", "two", "three", "four"],
          datasets: [{
              label: '# of Score',
              data: [11,21,31,41],
              backgroundColor: [
                  'red',
                  'blue',
                  'orange',
                  'green'
              ]
          }]
      },
      options: {
              responsive: false,
        display:true,
        pieceLabel: {
      mode: 'value'
    }
      }
    });
  }
  </code></pre>
  
  <p>I installed both Chart.js and Chart.piecelabel.js with npm install --save. I tried to add this into the .angular-cli.json file but it doesn't seem to have any effect:</p>
  
  <pre><code>"scripts": [
          "../node_modules/chart.piecelabel.js/build/Chart.PieceLabel.min.js"
        ]
  </code></pre>
  
  <p><strong>HTML</strong></p>
  
  <pre><code>&lt;canvas id="myChartPie" width="650px"&gt;&lt;/canvas&gt;
  </code></pre>
  
  <p>It looks like my PieceLabel.min.js is not being called/recognized and I'm not sure why</p>