Vue3中按需引入ECharts详细步骤(一看就会)

npm install echarts --save
有淘宝镜像的可以选择  (安装速度快)
cnpm install echarts --save

// 引入 echarts 核心模块，核心模块提供了 echarts 使用必须要的接口。
import * as echarts from "echarts/core";
/** 引入柱状图and折线图图表，图表后缀都为 Chart  */
import { BarChart, LineChart } from "echarts/charts";
// 引入提示框，标题，直角坐标系，数据集，内置数据转换器组件，组件后缀都为 Component
import {
  TitleComponent,
  TooltipComponent,
  GridComponent,
  DatasetComponent,
  TransformComponent,
} from "echarts/components";
// 标签自动布局，全局过渡动画等特性
import { LabelLayout, UniversalTransition } from "echarts/features";
// 引入 Canvas 渲染器，注意引入 CanvasRenderer 或者 SVGRenderer 是必须的一步
import { CanvasRenderer } from "echarts/renderers";
// 注册必须的组件
echarts.use([
  TitleComponent,
  TooltipComponent,
  GridComponent,
  DatasetComponent,
  TransformComponent,
  BarChart,
  LabelLayout,
  UniversalTransition,
  CanvasRenderer,
  LineChart,
]);
// 导出
export default echarts;

import App from './App'
// 引入echarts
import echarts from './common/js/echarts.js'
import {createSSRApp} from 'vue'
let app = createSSRApp(App)
// 挂载到vue实例中
// Vue.prototype.$echarts = echarts;//vue2的挂载方式
app.config.globalProperties.$echarts = echarts;//vue3的挂载方式
export function createApp() {
	return {app}
}
//调用的时候就是 ：  this.$echarts.init()

<template>
  <div>
    <div id="myEChartsBar"></div>
    <div id="myEChartsLine"></div>
  </div>
</template>
<script>
export default {
  data() {
    return {};
  },
  methods: {
    // 基本柱形图
    changeBar() {
      const myEChart= this.$echarts.init(document.getElementById("myEChartsBar"));
      const option = {
        xAxis: {
          data: ["Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun"],
        },
        yAxis: {},
        series: [
          {
            type: "bar",
            data: [23, 24, 18, 25, 27, 28, 25],
          },
        ],
      };
      myEChart.setOption(option);
      // 根据页面大小自动响应图表大小
      window.addEventListener("resize", function () {
        myEChart.resize();
      });
    },
    // 折线图
    changeLine() {
      // 获取组件实例
      const myEChart= this.$echarts.init(document.getElementById("myEChartsLine"));
      // 设置配置项
      const option = {
        xAxis: {
          data: ["A", "B", "C", "D", "E"],
        },
        yAxis: {},
        series: [
          {
            data: [10, 22, 28, 43, 49],
            type: "line",
            stack: "x",
          },
          {
            data: [5, 4, 3, 5, 10],
            type: "line",
            stack: "x",
          },
        ],
      };
      // 复制
      myEChart.setOption(option);
      // 根据页面大小自动响应图表大小
      window.addEventListener("resize", function () {
        myEChart.resize();
      });
    },
  },
  mounted() {
    this.changeBar();
    this.changeLine();
  },
};
</script>
<style lang="scss" scoped>
#myEChartsBar {
  min-width: 31.25rem;
  min-height: 31.25rem;
  // max-height: 500px;
}
#myEChartsLine {
  max-height: 500px;
  // max-height: 400px;
  height: 500px;
}
</style>