text: import React, { Component } from "react";
  import ReactEcharts from "echarts-for-react";
  import * as echarts from 'echarts'
  
  var data = [
    [
      [28604, 77, 17096869, "Australia", 1990],
      [31163, 77.4, 27662440, "Canada", 1990],
      [1516, 68, 1154605773, "China", 1990],
      [13670, 74.7, 10582082, "Cuba", 1990],
      [28599, 75, 4986705, "Finland", 1990],
      [29476, 77.1, 56943299, "France", 1990],
      [31476, 75.4, 78958237, "Germany", 1990],
      [28666, 78.1, 254830, "Iceland", 1990],
      [1777, 57.7, 870601776, "India", 1990],
      [29550, 79.1, 122249285, "Japan", 1990],
      [2076, 67.9, 20194354, "North Korea", 1990],
      [12087, 72, 42972254, "South Korea", 1990],
      [24021, 75.4, 3397534, "New Zealand", 1990],
      [43296, 76.8, 4240375, "Norway", 1990],
      [10088, 70.8, 38195258, "Poland", 1990],
      [19349, 69.6, 147568552, "Russia", 1990],
      [10670, 67.3, 53994605, "Turkey", 1990],
      [26424, 75.7, 57110117, "United Kingdom", 1990],
      [37062, 75.4, 252847810, "United States", 1990],
    ],
    [
      [44056, 81.8, 23968973, "Australia", 2015],
      [43294, 81.7, 35939927, "Canada", 2015],
      [13334, 76.9, 1376048943, "China", 2015],
      [21291, 78.5, 11389562, "Cuba", 2015],
      [38923, 80.8, 5503457, "Finland", 2015],
      [37599, 81.9, 64395345, "France", 2015],
      [44053, 81.1, 80688545, "Germany", 2015],
      [42182, 82.8, 329425, "Iceland", 2015],
      [5903, 66.8, 1311050527, "India", 2015],
      [36162, 83.5, 126573481, "Japan", 2015],
      [1390, 71.4, 25155317, "North Korea", 2015],
      [34644, 80.7, 50293439, "South Korea", 2015],
      [34186, 80.6, 4528526, "New Zealand", 2015],
      [64304, 81.6, 5210967, "Norway", 2015],
      [24787, 77.3, 38611794, "Poland", 2015],
      [23038, 73.13, 143456918, "Russia", 2015],
      [19360, 76.5, 78665830, "Turkey", 2015],
      [38225, 81.4, 64715810, "United Kingdom", 2015],
      [53354, 79.1, 321773631, "United States", 2015],
    ],
  ];
  
  class Bubble extends Component {
    getOption = () => {
      return {
        tooltip: {
          trigger: "axis",
          show: false,
        },
        toolbox: {
          show: false,
        },
        grid: {
          zlevel: 0,
          x: 50,
          x2: 50,
          y: 30,
          y2: 30,
          borderWidth: 0,
          backgroundColor: "rgba(0,0,0,0)",
          borderColor: "rgba(0,0,0,0)",
        },
        legend: {
          right: 10,
          data: ["2017", "2019"],
        },
        xAxis: {
          splitLine: {
            lineStyle: {
              type: "dashed",
            },
          },
          axisLine: {
            lineStyle: {
              color: "#74788d",
            },
          },
        },
        yAxis: {
          splitLine: {
            lineStyle: {
              type: "dashed",
            },
          },
          scale: true,
          axisLine: {
            lineStyle: {
              color: "#74788d",
            },
          },
        },
        series: [
          {
            name: "2017",
            data: data[0],
            type: "scatter",
            symbolSize: function (data) {
              return Math.sqrt(data[2]) / 5e2;
            },
            label: {
              emphasis: {
                show: true,
                formatter: function (param) {
                  return param.data[3];
                },
                position: "top",
              },
            },
            itemStyle: {
              normal: {
                shadowBlur: 10,
                shadowColor: "rgba(60, 76, 207, 0.5)",
                shadowOffsetY: 5,
                color: new echarts.graphic.RadialGradient(0.4, 0.3, 1, [
                  {
                    offset: 0,
                    color: "rgb(145, 155, 236)",
                  },
                  {
                    offset: 1,
                    color: "rgb(60, 76, 207)",
                  },
                ]),
              },
            },
          },
          {
            name: "2019",
            data: data[1],
            type: "scatter",
            symbolSize: function (data) {
              return Math.sqrt(data[2]) / 5e2;
            },
            label: {
              emphasis: {
                show: true,
                formatter: function (param) {
                  return param.data[3];
                },
                position: "top",
              },
            },
            itemStyle: {
              normal: {
                shadowBlur: 10,
                shadowColor: "rgba(2, 164, 153, 0.5)",
                shadowOffsetY: 5,
                color: new echarts.graphic.RadialGradient(0.4, 0.3, 1, [
                  {
                    offset: 0,
                    color: "rgb(33, 222, 209)",
                  },
                  {
                    offset: 1,
                    color: "rgb(2, 164, 153)",
                  },
                ]),
              },
            },
          },
        ],
      };
    };
    render() {
      return (
        <React.Fragment>
          <ReactEcharts style={{ height: "350px" }} option={this.getOption()} />
        </React.Fragment>
      );
    }
  }
  export default Bubble;
  