echarts.js?a670:2278 There is a chart instance already initialized on the dom.

echarts.js?a670:2278 There is a chart instance already initialized on the dom.

当项目中使用echarts结合接口数据显示多个图表时,会显示这个问题,试了好多方法,最后解决了

 drawLine() {
      if (this.mChart !== undefined) {
        this.mChart.dispose(); //去掉控制台多个echarts Dom的警告
      }
      this.$nextTick(() => {
        this.$echarts.init(document.getElementById("mChart")).dispose();
        this.mChart = this.$echarts.init(
          document.getElementById("mChart")
        );
        this.mOption = {
tooltip: {
            trigger: "axis",
            axisPointer: {
              type: "cross",
            },
            position: ["20%", "20%"],
          },
          legend: {
            data: ["学生", "教师"],
          },
          grid: {
            left: "3%",
            right: "8%",
            bottom: "3%",
            containLabel: true,
          },

          xAxis: {
            type: "category",
            boundaryGap: false,
            data: [1,2,3,4,5],
            axisLabel: {
              formatter: function (item) {
                return item;
              },
            },
          },
          yAxis: {
            name: "数值",
            type: "value",
          },
          series: [
            {
              name: "学生",
              type: "line",
              smooth: true,
              data: [1,2,3,4]
            },
            {
              name: "教师",
              type: "line",
              smooth: true,
              data: [1,2,3,4,5],
            },
          ],
        };
        this.mChart.setOption(this.mOption);
      });


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