使用echarts实现金字塔效果，颜色渐变，左右显示其对应的值

效果：

如果要实现一个正三角的形状，需要在data数组中，将value赋值成有序递增，bl代表他的分值，显示在左侧。

  var data = [
        {
          name: "小学",
          value: 10,
          bl: 50,
        },
        {
          name: "初中",
          value: 20,
          bl: 56,
        },
        {
          name: "高中",
          value: 30,
          bl: 21,
        },
        {
          name: "大学",
          value: 40,
          bl: 86,
        },
        {
          name: "研究生",
          value: 50,
          bl: 12,
        },
      ];

      //gradient 方法用来实现获取每一层的颜色值
      var colorList = this.gradient("#e3e4e9", "#8b8cba", data.length);
      var myChart = echarts.init(this.$refs.main);
      // 指定图表的配置项和数据
      var option = {
        color: colorList,
        tooltip: {
          trigger: "item",
          triggerOn: "mousemove",
          formatter: function (params) {
            var result = params.data.name;
            return result;
          },
        },
        series: [
          {
            name: "Funnel",
            type: "funnel",
            sort: "ascending",
            top: "5%",
            left: "5%",
            bottom: "0",
            width: "60%", // 宽度可以自定义
            height: "90%", // 高度可以自定义
            min: 0,
            max: data.length * 10,
            label: {
              show: true,
              position: "left",
              formatter: "{c}",
              formatter: function (params) {
                return params.data.bl;
              },
              color: "#FFFFFF",
              fontSize: 12,
            },
            labelLine: {
              show: false,
              length: 2,
            },
            itemStyle: {
              normal: {
                borderWidth: 0,
                opacity: 0.6,
              },
            },
            emphasis: {
              label: {
                fontSize: 10,
              },
            },
            data: data,
            zlevel: 2,
          },
          {
            name: "Funnel",
            type: "funnel",
            sort: "ascending",
            top: "5%",
            left: "5%",
            bottom: "0",
            width: "60%", // 宽度可以自定义
            height: "90%", // 高度可以自定义
            min: 0,
            max: data.length * 10,
            label: {
              show: true,
              position: "right",
              color: "#FFFFFF",
              fontSize: 12,
              formatter: function (params) {
                return params.data.state.length > 8
                  ? params.data.state.substring(0, 8) + "..."
                  : params.data.state;
               },
             
            },
            labelLine: {
              show: false,
              length: 2,
            },
            itemStyle: {
              normal: {
                borderWidth: 0,
                // borderColor: "transparent",
                opacity: 0.6,
              },
            },
            emphasis: {
              label: {
                fontSize: 12,
              },
            },
            data: data,
            zlevel: 1,
          },
        ],
      };

      // 使用刚指定的配置项和数据显示图表。
      myChart.setOption(option);
      window.addEventListener("resize", () => {
        myChart.resize();
      });

获取每一层渐变的颜色值

function rgbToHex(r, g, b) {
  var hex = ((r << 16) | (g << 8) | b).toString(16);
  return "#" + new Array(Math.abs(hex.length - 7)).join("0") + hex;
}
function hexToRgb(hex) {
  var rgb = [];
  for (var i = 1; i < 7; i += 2) {
    rgb.push(parseInt("0x" + hex.slice(i, i + 2)));
  }
  return rgb;
}

export function gradient(startColor, endColor, step) {
  //将hex转换为rgb
  var sColor = hexToRgb(startColor),
    eColor = hexToRgb(endColor);

  //计算R\G\B每一步的差值
  var rStep = (eColor[0] - sColor[0]) / step;
  var gStep = (eColor[1] - sColor[1]) / step;
  var bStep = (eColor[2] - sColor[2]) / step;

  var gradientColorArr = [];
  for (var i = 0; i < step; i++) {
    //计算每一步的hex值
    gradientColorArr.push(
      rgbToHex(
        parseInt(rStep * i + sColor[0]),
        parseInt(gStep * i + sColor[1]),
        parseInt(bStep * i + sColor[2])
      )
    );
  }
  return gradientColorArr;
}