切換事假中清除echart

  checkNav(e){
    this.setData({
      activeIndex: e.currentTarget.dataset.index,
      activeName: e.currentTarget.dataset.navname,
    })
    tab1Echart.dispatchAction({
      type: 'updateAxisPointer',
      currTrigger: 'leave'
   })
    this.getNewRevenue()
  },

echarts程式碼

import * as echarts from '../../../ec-canvas/echarts';
let tab1Echart 
 
= null
function lineOption(tab1Xdata, y1Data, y2Data,y3Data){
  let option = {
    title: {
      text: tab1Xdata.length==0?'暫無資料':'',
      x: 'center' ,
      y: 'center' ,
      textStyle: {
          color: '#bcbcbc',
          fontWeight: 600,
          fontSize:  16
      }
    },
    legend: {
      selectedMode: 
 
false,
      // data: [tab1Line1Name, tab1Line2Name],
      top: '2%',
      left: 'left',
      backgroundColor: '#fff',
      z: 100,
    },
    grid: {
      left: '3%',right: '3%',top: '20%',bottom: '3%',
      containLabel: true
    },
    tooltip: {
      show: true,
      trigger: 'shadow',
      axisPointer:{
        shadowStyle:{
          color: 
 
'rgba(150,150,150,0.3)'
        }
      }
    },
    xAxis: {
      type: 'category',
      boundaryGap: false,
      data: tab1Xdata,
    },
    yAxis: {
      type: 'value',
      x: 'center',
      splitLine: {
        lineStyle: {
          type: 'dashed'
        }
      },
    },
    series: []
  };
  return option
}
let xData = [], onedata = [],twodata = [], beonline = []
function initChart(canvas, width, height) {
  tab1Echart = echarts.init(canvas, null, {
    width: width,
    height: height
  });
  canvas.setChart(tab1Echart);
  // tab1Echart.showLoading({
  //   text: 'loading',
  //   color: '#c23531',
  //   textColor: '#000',
  //   maskColor: 'rgba(255, 255, 255, 0.2)',
  //   zlevel: 0,
  // });
  var option = lineOption(xData, onedata, twodata, beonline)
  tab1Echart.setOption(option);
  return tab1Echart;
}