微信小程序中使用ec-canvas

//index.js,通常数据都是通过异步获取，只需要在合适的时机调用initChart方法即可。
import * as echarts from "../comps/ec-canvas/echarts";
let chart = null;
Page({
  data: {
    ec: {
      lazyload: true
    },
  },
  async initChart() {
    await this.selectComponent("#mychart-dom-bar").init((canvas, width, height, dpr) => {
      chart = echarts.init(canvas, null, {
        width: width,
        height: height,
        devicePixelRatio: dpr
      });
      this.updateChart()
      canvas.setChart(chart);
      return chart;
    })
  },
  updateChart() {
    let _this = this;
    let option = {
      color: ["rgba(65, 158, 255, 1)"],
      grid: {
        containLabel: true,
        left: 12,
        right: 14,
        top: 40,
        bottom: 30
      },
      tooltip: {
        show: true,
        trigger: "axis",
        trigger: "axis",
        formatter: function (params) {
          var relVal = params[0].name;
          for (var i = 0, l = params.length; i

//index.css
ec-canvas {
  width: 100%;
  height: 100%;
}