为啥就是不显示呢？？气人

wxml:

<canvas class=“canvas” canvas-id=“pieGraph”></canvas>

js:

var Charts = require(’…/…/utils/wxcharts.js’);

  onLoad: function (options) {

    new Charts({

      canvasId: ‘pieGraph’,

      type: ‘pie’,

      series: [

        { name: ‘1’, data: 15, },

        { name: ‘2’, data: 30, },

      ],

      width: 640,

      height: 640,

     dataLabel: false

    })

  },

wxss:

.canvas {

  width: 80px;

  height: 80px;

}