ehcarts tooltip 自定义展示. 展示小图例

效果

代码

tooltip: {
  show: true,
  trigger: 'axis',
  formatter: function (params) {
    let axisValueLabel = params[0].axisValueLabel
    let sumVal = 0;
    let src = axisValueLabel + '<br>';
    for (let x in params) {
    sumVal += Number(params[x].value)
      src += params[x].marker + params[x].seriesName + ": " + params[x].value + '<br>';
    }
    return src
  },
}