Echarts为柱状图每个系列设置目标线(散点气泡图)

需求如下

配置项

import * as echarts from 'echarts';

var chartDom = document.getElementById('main');
var myChart = echarts.init(chartDom);
var option;

option = {
  tooltip: {
    trigger: 'axis',
    confine: true,// 设置tooltip在面板内
    axisPointer: {
      type: 'cross',
      crossStyle: {
        color: '#999'
      }
    },
    // 动态设置tooltip在面板内
    position: function (point, params, dom, rect, size) {
            // 鼠标坐标和提示框位置的参考坐标系是：以外层div的左上角那一点为原点，x轴向右，y轴向下
            // 提示框位置
            var x = 0 // x坐标位置
            var y = 0 // y坐标位置

            // 当前鼠标位置
            var pointX = point[0]
            var pointY = point[1]

            // 外层div大小
            // var viewWidth = size.viewSize[0];
            // var viewHeight = size.viewSize[1];

            // 提示框大小
            var boxWidth = size.contentSize[0]
            var boxHeight = size.contentSize[1]

            // boxWidth > pointX 说明鼠标左边放不下提示框
            if (boxWidth > pointX) {
              x = pointX + 10
            } else { // 左边放的下
              x = pointX - boxWidth - 10
            }

            // boxHeight > pointY 说明鼠标上边放不下提示框
            if (boxHeight > pointY) {
              y = 5
            } else { // 上边放得下
              y = pointY - boxHeight
            }

            return [x, y]
          },
  },
  toolbox: {
    feature: {
      dataView: { show: true, readOnly: false },
      magicType: { show: true, type: ['line', 'bar'] },
      restore: { show: true },
      saveAsImage: { show: true }
    }
  },
  legend: {
    data: ['Evaporation', 'Precipitation', 'Temperature']
  },
  xAxis: [
    {
      type: 'category',
      data: ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun'],
      axisPointer: {
        type: 'shadow'
      }
    }
  ],
  yAxis: [
    {
      type: 'value',
      name: 'Precipitation',
      min: 0,
      max: 250,
      interval: 50,
      axisLabel: {
        formatter: '{value} ml'
      }
    },
    {
      type: 'value',
      name: 'Temperature',
      min: 0,
      max: 25,
      interval: 5,
      axisLabel: {
        formatter: '{value} °C'
      }
    }
  ],
  series: [
    {
      name: 'Evaporation',
      type: 'bar',
      tooltip: {
        valueFormatter: function (value) {
          return value + ' ml';
        }
      },
      data: [
        2.0, 4.9, 7.0, 23.2, 25.6, 76.7, 135.6, 162.2, 32.6, 20.0, 6.4, 3.3
      ]
    },
    {
      name: 'Precipitation',
      type: 'bar',
      tooltip: {
        valueFormatter: function (value) {
          return value + ' ml';
        }
      },
      data: [
        2.6, 5.9, 9.0, 26.4, 28.7, 70.7, 175.6, 182.2, 48.7, 18.8, 6.0, 2.3
      ]
    },
    {
      name: 'Temperature',
      // 散点气泡图 修改样式 设置目标线
      type: 'scatter',
      symbol: 'rect',
      color: 'red',
      label: {
        show: true,
        position: 'right'
      },
      symbolSize: [60, 2],
      yAxisIndex: 1,
      tooltip: {
        valueFormatter: function (value) {
          return value + ' °C';
        }
      },
      data: [2.0, 2.2, 3.3, 4.5, 6.3, 10.2, 20.3, 23.4, 23.0, 16.5, 12.0, 6.2]
    }
  ]
};

option && myChart.setOption(option);