网站SEO建设摘要今天大事件新闻

做大屏的时候经常会遇到 echarts 展示，下面展示在 React （^18.2.0） 中对 echarts （^5.4.0） 的简单封装。

文章首发于https://blog.fxss.work/react/echarts封装.html，样例查看

echarts 封装使用

props 说明

方法

使用

如下演示 echarts 封装使用：

可以将如下代码拷贝到项目运行，更方便查看效果

import { Button, Typography, theme } from "antd";
import React from "react";
import EchartsModule from "../../components/EchartsModule";const { Title } = Typography;
const { useToken } = theme;const PageDemo = () => {const { token } = useToken();const { colorText, colorBgContainer, colorBorder } = token;const echartsRef = React.createRef();const options = {textStyle: {color: colorText,},title: {text: '饼图程序调用高亮示例',left: 'center',textStyle: {color: colorText,},},tooltip: {trigger: 'item',formatter: '{a} <br/>{b} : {c} ({d}%)',confine: true,className: 'echart-tooltip-zIndex',backgroundColor: colorBgContainer,borderColor: colorBorder,textStyle: {color: colorText,},},legend: {orient: 'vertical',left: 'left',data: ['直接访问', '邮件营销', '联盟广告', '视频广告', '搜索引擎'],textStyle: {color: colorText,},}}const seriesData = [{name: '访问来源',type: 'pie',radius: '55%',center: ['50%', '60%'],lable: {textStyle: {color: colorText,},},data: [{ value: 335, name: '直接访问' },{ value: 310, name: '邮件营销' },{ value: 234, name: '联盟广告' },{ value: 135, name: '视频广告' },{ value: 1548, name: '搜索引擎' }],emphasis: {itemStyle: {shadowBlur: 10,shadowOffsetX: 0,}}}]const changeDate = () => {echartsRef.current.echartsPlay(true, 0, -1)}const changeDate1 = () => {echartsRef.current.echartsPause()}const changeDate2 = () => {const echartsInstance = echartsRef.current.echartsInstance()echartsInstance.clear()echartsInstance.dispose()}return (<div><Title level={3}>6、通过 ref 调用开始结束动画，使用 ref 调用的好处是可以指定在第几项开始动画</Title><div><Button onClick={changeDate}>开始动画</Button><Button className="ml-2" onClick={changeDate1}>结束动画</Button><Button className="ml-2" onClick={changeDate2}>获取实例，销毁echarts</Button></div><div className="w-full h-80"><EchartsModule onRef={echartsRef} options={options} seriesData={seriesData}></EchartsModule></div></div>);
};export default PageDemo;

代码封装

import { useEffect, useImperativeHandle, useRef } from "react";
import * as echarts from 'echarts';
import { useDeepCompareEffect, useMount, useSize, useUnmount, useUpdateEffect } from "ahooks";
import classNames from 'classnames';const EchartsModule = ({// https://echarts.apache.org/zh/api.html#echarts.init// 初始化传入的 optsopts = { renderer: 'svg' },// 配置项options = {},// 数据集合seriesData = [],// 自动切换的时间跨度intervalTime = 1500,// 是否自动播放autoPlay = true,// 是否自动添加鼠标上移事件isAddOn = true,onRef,className = ''
}) => {const echartsRef = useRef(null);let myChart = useRef(null);let echartsOptions = useRef({});let myChartEventTime = useRef(null);let currentSeriesIndex = useRef(0);let currentDataIndex = useRef(-1);let timer = useRef(intervalTime);// 是否调用过 echartsPlaylet isEchartsPlay = useRef(false);// echarts初始化function init() {destroyEchart() //判断是否有echart实例，如果有，先销毁myChart.current = echarts.init(echartsRef.current, null, opts)update()if (isAddOn) {addEventFn()}}// 绑定事件function addEventFn() {// 鼠标移上查看的时候，暂停动画myChart.current.on('mouseover', 'series', event => {// 取消之前高亮的图形myChart.current.dispatchAction({type: 'downplay',seriesIndex: currentSeriesIndex.current,dataIndex: currentDataIndex.current})echartsPause()})// 鼠标移出的时候打开动画myChart.current.on('mouseout', 'series', event => {// 自动播放 或者 调用过 echartsPlayif (autoPlay || isEchartsPlay.current) echartsPlay(true, event.seriesIndex, event.dataIndex - 1)})}// 移除事件function removeEventFn() {myChart.current.off('mouseover')myChart.current.off('mouseout')}// 数据更新function update() {// 逻辑处理组件options参数const curOptions = {...options,series: seriesData// other options here ...}echartsOptions.current = curOptions// 调用ECharts组件setOption更新myChart.current.setOption(curOptions, true)if (curOptions.series.length && autoPlay) {myChart.current.dispatchAction({type: 'highlight',seriesIndex: currentSeriesIndex.current,dataIndex: currentDataIndex.current})// 显示 tooltipmyChart.current.dispatchAction({type: 'showTip',seriesIndex: currentSeriesIndex.current,dataIndex: currentDataIndex.current})echartsPlay(false, currentSeriesIndex.current, currentDataIndex.current <= seriesData[currentSeriesIndex.current].data.length - 1 ? currentDataIndex.current : -1)}}// 销毁echartsfunction destroyEchart() {if (myChart.current) {if (isAddOn) {removeEventFn()}if (typeof myChart.current.clear === 'function') myChart.current.clear()if (typeof myChart.current.dispose === 'function') myChart.current.dispose()myChart.current = null}}/*** echarts开启动画，可手动调用* clear: 是否立即开始动画，并清除上个定时器，开启下个定时器，默认为 false* seriesIndex: series 中的第几项数据，默认为 0* dataIndex: series[seriesIndex].data 中的第几项，默认为 -1*/function echartsPlay(clear = false, seriesIndex = 0, dataIndex = -1) {if (clear) {echartsPause()}isEchartsPlay.current = truecurrentSeriesIndex.current = seriesIndexcurrentDataIndex.current = dataIndexif (!myChartEventTime.current) {echartsEventPlay(seriesIndex)}}function echartsTimeout(seriesIndex = 0) {myChartEventTime.current = setTimeout(() => {echartsEventPlay(seriesIndex)}, timer.current)}function echartsEventPlay(seriesIndex = 0) {const dataLen = echartsOptions.current.series[seriesIndex].data.lengthif (myChart.current && myChart.current.dispatchAction) {// 取消之前高亮的图形myChart.current.dispatchAction({type: 'downplay',seriesIndex,dataIndex: currentDataIndex.current})currentDataIndex.current = (currentDataIndex.current + 1) % dataLen// 高亮当前图形myChart.current.dispatchAction({type: 'highlight',seriesIndex,dataIndex: currentDataIndex.current})// 显示 tooltipmyChart.current.dispatchAction({type: 'showTip',seriesIndex,dataIndex: currentDataIndex.current})}echartsTimeout(seriesIndex)}// echarts关闭动画，可手动调用function echartsPause() {if (myChart.current && myChart.current.dispatchAction) {// 取消之前高亮的图形myChart.current.dispatchAction({type: 'downplay',seriesIndex: currentSeriesIndex.current,dataIndex: currentDataIndex.current})// 取消显示 tooltipmyChart.current.dispatchAction({type: 'hideTip'})}if (myChartEventTime.current) {clearTimeout(myChartEventTime.current)myChartEventTime.current = null}}// 重置大小const echartsResize = () => {if (myChart.current) myChart.current.resize()}useMount(() => {init()})useUnmount(() => {echartsPause()destroyEchart()})useDeepCompareEffect(() => {update()}, [seriesData])useUpdateEffect(() => {if (autoPlay) {echartsPlay(false, currentSeriesIndex.current, currentDataIndex.current)} else {echartsPause()}}, [autoPlay])useUpdateEffect(() => {timer.current = intervalTime}, [intervalTime])useUpdateEffect(() => {if (isAddOn) {addEventFn()} else {removeEventFn()}}, [isAddOn])const size = useSize(echartsRef)useEffect(() => {echartsResize()}, [size])useImperativeHandle(onRef, () => {return {echartsInstance: () => myChart.current,echartsPlay,echartsPause}});return (<div ref={echartsRef} className={classNames('w-full h-full', className)}></div>);
};export default EchartsModule;