背景：因为数据不固定 高度写死导致数据显示不全，所以图表高度要根据内容计算
实现代码如下：

 <div
      v-if="showCharts"
      id="business-bars"
      class="chart"
      :style="{ height: chartHeight + 'px' }"
    ></div>
    ```
    ```
      data() {
    return {
      chartHeight: 0,
      deptData: {},
      yAxisData: [], // 用于y轴的数据
     .......//其它数据
      }
     }
     ```
     ```
      watch: {
    yAxisData(newData) {
      this.chartHeight = newData.length * 30 + 20;
      this.$nextTick(() => {
      this.drawChart();
        const chart = echarts.init(document.getElementById("business-bars"));
        chart.resize()
       });
    },
  },

 mounted() {
  this.init(); // 初始化图表数据
  this.$nextTick(() => {
    //this.drawChart(); // 绘制图表
  });
},

思路：通过监听’yAxisData’的变化，来动态地计算和调整图表的整体高度
重点：1、在 Watch 属性的回调函数内调用了 drawChart() 方法，确保图表的高度在动态计算后被正确应用，
在 Watch 属性中通过 this.$nextTick() 来调用 drawChart() 方法，以确保在图表高度更新后再进行绘制操作

watch: {
  yAxisData(newData) {
    this.chartHeight = newData.length * 17 + 20;
    this.$nextTick(() => {
      this.drawChart();
       const chart = echarts.init(document.getElementById("business-bars"));
        chart.resize()
    });
  }
},

2、在 drawChart() 方法中，确保在绘制图表之前，已经将图表容器的实际高度设置为计算后的高度

methods: {
    drawChart() {
      const chart = echarts.init(document.getElementById("business-bars"));
      const chartContainer = document.getElementById("business-bars");
      chartContainer.style.height = this.chartHeight + "px";
      const option = {
        barWidth: 20,
        barGap: "30%", // 调整同一类目上的柱子间隔
        barCategoryGap: "20%", // 调整不同类目的柱子间隔
        // dataZoom: [ 
        //   {
        //     type: 'slider',
        //     yAxisIndex: 0, // y轴索引
        //     startValue: 0, // 起始数据索引
        //     endValue: 5,  // 结束数据索引
        //     zoomLock: true // 禁用滑动条
        //   }
        // ],
        color: [
          "rgba(27, 158, 255, 1)",
          "rgba(0, 210, 233, 1)",
          "rgba(253, 200, 79, 1)",
        ],
        tooltip: {
          trigger: "axis",
          axisPointer: {
            type: "shadow",
          },
        },
        legend: {
          bottom: 20,
          itemGap: 15,
          itemWidth: 10,
          itemHeight: 10,
        },
        grid: {
          left: "2%",
          right: "4%",
          top: "2%",
          containLabel: true,
        },
        xAxis: {
          type: "value",
          splitLine: {
            show: false,
          },
        },
        yAxis: {
          type: "category",
          data: this.yAxisData,
          axisLine: {
            show: false,
          },
          axisTick: {
            show: false,
            interval: 0,
          },
          axisLabel: {
            interval: 0,
            formatter: function (value) {
              if (value.length > 5) {
                return `${value.substr(0, 5)}...`;
              }
              return value;
            },
          },
        },
        series: this.seriesData,
      };

      const that = this;
      chart.off("click");
      chart.on("click", function (param) {
        const index = PROJECT_STATE_ENUM.findIndex(
          (item) => item.name === param.seriesName
        );
        that.value = param.seriesName;
        that.dept = param.name;
        if (index > -1) {
          let time;
          if (that.current === "all") {
            time = 0;
          } else if (that.current === "week") {
            time = 1;
          } else if (that.current === "month") {
            time = 2;
          } else if (that.current === "year") {
            time = 3;
          }
          that.$emit("query", {
            value: PROJECT_STATE_ENUM[index].code,
            time: time,
            dept: param.name,
          });
        }
      });
      chart.setOption(option);

      // 自适应窗口大小
      window.addEventListener("resize", function () {
        chart.resize();
      });
    },
}

实现效果如下：按照内容高度 撑开全部展示


如果左侧高度想固定 超出部分右侧滚动条上下滚动的形式展示 则在echarts配置中添加datazoom属性

  // dataZoom: [
        //   {
        //     type: 'slider',
        //     yAxisIndex: 0, // y轴索引
        //     startValue: 0, // 起始数据索引
        //     endValue: 5,  // 结束数据索引
        //     zoomLock: true // 禁用滑动条
        //   }
        // ],

展示效果如下：