在Vue3项目中使用如何echarts问题

npm create useecharts

npm install echarts --save

src/components/BarGraph.vue：
<template>
  <div class="echarts-box">
    <div id="myEcharts" :style="{ width: this.width, height: this.height }"></div>
  </div>
</template>
<script>
import * as echarts from "echarts";
import {onMounted, onUnmounted} from "vue";
export default {
  name: "App",
  props: ["width", "height"],
  setup() {
    let myEcharts = echarts;
    onMounted(() => {
      initChart();
    });
    onUnmounted(() => {
      myEcharts.dispose;
    });
    function initChart() {
      let chart = myEcharts.init(document.getElementById("myEcharts"), "purple-passion");
      chart.setOption({
        title: {
          text: "2021年各月份销售量（单位：件）",
          left: "center",
        },
        xAxis: {
          type: "cateGory",
          data: [
            "一月", "二月", "三月", "四月", "五月", "六月", "七月", "八月", "九月", "十月", "十一月", "十二月"
          ]
        },
        tooltip: {
          trigger: "axis"
        },
        yAxis: {
          type: "value"
        },
        series: [
          {
            data: [
              606, 542, 985, 687, 501, 787, 339, 706, 383, 684, 669, 737
            ],
            type: "line",
            smooth: true,
            itemStyle: {
              nORMal: {
                label: {
                  show: true,
                  position: "top",
                  formatter: "{c}"
                }
              }
            }
          }
        ]
      });
      window.onresize = function () {
        chart.resize();
      };
    }
    return {
      initChart
    };
  }
};
</script>

src/App.vue：
<template>
  <bar-graph :width="'900px'" :height="'600px'"></bar-graph>
</template>
<script>
import BarGraph from "@/components/BarGraph";
export default {
  name: "App",
  components: {
    BarGraph
  },
}
</script>
<style>
#app {
}
</style>

import * as echarts from "echarts";

<template>
  <div class="echarts-box">
    <div id="myEcharts" :style="{ width: this.width, height: this.height }"></div>
  </div>
</template>
<script>
// 导入 ECharts
import * as echarts from "echarts";
import {onMounted, onUnmounted} from "vue";
export default {
  name: "App",
  props: ["width", "height"],
  setup() {
    let myEcharts = echarts;
    // 挂载时初始化图表
    onMounted(() => {
      initChart();
    });
    // 卸载时销毁图表
    onUnmounted(() => {
      // 销毁图表
      myEcharts.dispose;
    });
    function initChart() {
      // 基于准备好的dom，初始化echarts实例
      let chart = myEcharts.init(document.getElementById("myEcharts"), "purple-passion");
      chart.setOption({
        // 设置图表的标题
        title: {
          // 设置标题文本
          text: "2021年各月份销售量（单位：件）",
          // title 组件离容器左侧的距离
          left: "center",
        },
        // 设置图表的 X 轴
        xAxis: {
          // 数据类型为离散的类目数据
          type: "category",
          // 设置 X 轴数据
          data: [
            "一月", "二月", "三月", "四月", "五月", "六月", "七月", "八月", "九月", "十月", "十一月", "十二月"
          ]
        },
        // 设置提示框组件
        tooltip: {
          // 设置提示框的触发条件
          trigger: "axis"
        },
        // 设置图表的 Y 轴
        yAxis: {
          // 数据类型为连续的数值数据
          type: "value"
        },
        // 设置图表的图例
        series: [
          {
            // 图例中要展示的数据
            data: [
              606, 542, 985, 687, 501, 787, 339, 706, 383, 684, 669, 737
            ],
            // 设置图表的类型为折线图
            type: "line",
            // 平滑曲线
            smooth: true,
            // 在顶部显示数据
            itemStyle: {
              normal: {
                label: {
                  show: true,
                  position: "top",
                  formatter: "{c}"
                }
              }
            }
          }
        ]
      });
      // 大小自适应窗口大小变化
      window.onresize = function () {
        // 重置容器高宽
        chart.resize();
      };
    }
    return {
      initChart
    };
  }
};
</script>

<script>
// 导入 ECharts
import * as echarts from "echarts";
export default {
  name: "App",
  props: ["width", "height"],
  data() {
    return {
      // 数据源一，从服务器获得
      postTitle: [...],
      // 数据源二，从服务器获得
      postLikes: [...],
      myEcharts: {},
      option: {
        // 设置图表的 X 轴
        xAxis: {
          // 数据类型为离散的类目数据
          type: "category",
          // 设置 X 轴数据
          data: this.postTitle,
        },
        // 设置图表的 Y 轴
        yAxis: {
          // 数据类型为连续的数值数据
          type: "value",
        },
        // 设置图表的图例
        series: [
          {
            // 图例中要展示的数据
            data: this.postLikes,
            // 设置图表的类型为柱状图
            type: "bar",
          }
        ]
      },
    }
  },
  ...
  watch: {
    // 如果 postTitle 发生变化，则重新渲染图表
    postTitle: {
      handler: function (newVal, oldVal) {
        if (newVal !== oldVal) {
          this.option.xAxis.data = this.postTitle;
          // 横坐标变化，纵坐标也相应变化
          this.option.series[0].data = this.postLikes;
          // 重新渲染图表
          this.myEcharts.setOption(this.option);
        }
      },
      deep: true
    },
    postLikes: {
      handler: function (newVal, oldVal) {
        if (newVal !== oldVal) {
          this.option.series[0].data = this.postLikes;
          this.myEcharts.setOption(this.option);
        }
      },
      deep: true
    }
  }
};
</script>