chart.js生成饼状图

 <script src=‘https://cdn.bootcss.com/Chart.js/2.7.3/Chart.js‘></script>

 <canvas id="myChart" width="500px" height="150px"></canvas>

<script src=‘https://cdn.bootcss.com/Chart.js/2.7.3/Chart.js‘></script>

<script>
  var ctx = document.getElementById(‘myChart‘).getContext(‘2d‘);
  var data = {
    datasets: [{
        data: [10,20,30], //在这里写数据
        backgroundColor:["red","green","blue"] //在这里指定颜色
    }],

    labels: [ //这里写标签，即每个数据属于哪个种类
        ‘label1‘, 
        ‘label2‘,
        ‘label3‘
    ]
  };

  var myPieChart = new Chart(ctx, {
   type: ‘pie‘,
   data: data
});
  
</script>