【Echarts】 报错There is a chart instance already initialized on the dom.

1、There is a chart instance already initialized on the dom.

解决办法：重绘图表时，我们要把之前已经渲染好的 图表清空。

const getEcharts = () => {
  let myChart = echarts.getInstanceByDom(document.getElementById("chart")
  );
  if (myChart == null) {myChart = echarts.init(document.getElementById("chart"));
  }
  myChart.setOption(option);
}