Vue3 + echarts 统一封装

1. 新建 echartsLib.js 文件，统一导入需要的组件

import * as echarts from "echarts/core";

import { SVGRenderer, CanvasRenderer } from "echarts/renderers";

import { BarChart, LineChart, PieChart } from "echarts/charts";

import {
  TitleComponent,
  TooltipComponent,
  GridComponent,
  LegendComponent,
  ToolboxComponent,
  DataZoomComponent,
  TimelineComponent,
} from "echarts/components";

echarts.use([
  BarChart,
  LineChart,
  PieChart,
  TitleComponent,
  TooltipComponent,
  LegendComponent,
  GridComponent,
  ToolboxComponent,
  DataZoomComponent,
  TimelineComponent,
  CanvasRenderer
]);

export default echarts;

2. 新建 newChart.js 文件封装用法

import { nextTick, onMounted, onUnmounted, unref } from "vue";
import echarts from "./echartsLib.js";
import { SVGRenderer, CanvasRenderer } from "echarts/renderers";

export default function useChart(
  elRef,
  autoChartSize = false,
  animation = false,
  theme = "default"
) {
  // 设置渲染模式
  echarts.use(CanvasRenderer);

  // echart实例
  let chartInstance = null;

  // 初始化图表
  const initCharts = () => {
    const el = unref(elRef);
    if (!el || !unref(el)) {
      return;
    }
    chartInstance = echarts.init(el, theme);
  };

  const setOption = (option) => {
    nextTick(() => {
      if (!chartInstance) {
        initCharts();
        if (!chartInstance) return;
      }

      chartInstance.setOption(option);
      hideLoading();
    });
  };

  // 获取echart实例
  function getInstance() {
    if (!chartInstance) {
      initCharts();
    }
    return chartInstance;
  }

  function resize() {
    chartInstance?.resize();
  }

  // 监听元素大小
  function watchEl() {
    // 添加过渡
    if (animation) {
      elRef.value.style.transition = "width 1s, height 1s";
    }
    const resizeObserver = new ResizeObserver((entries) => resize());
    resizeObserver.observe(elRef.value);
  }

  // 显示加载
  function showLoading() {
    if (!chartInstance) {
      initCharts();
    }
    chartInstance?.showLoading();
  }
  // 隐藏加载
  function hideLoading() {
    if (!chartInstance) {
      initCharts();
    }
    chartInstance?.hideLoading();
  }

  onMounted(() => {
    window.addEventListener("resize", resize);
    if (autoChartSize) watchEl();
  });

  onUnmounted(() => {
    window.removeEventListener("resize", resize);
  });

  return {
    setOption,
    getInstance,
    showLoading,
    hideLoading,
  };
}

3. 使用

<div ref="myChart"></div>

import useChart from "@/utils/useChart";
import { reactive, onMounted, ref } from "vue";

const myChart = ref(null);
const { setOption } = useChart(myChart, true, true);
let option = {}

onMounted(() => {
  setOption(option);
});