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react动态路由组件的封装

我这篇比较全面
首先下载包
npm i react-router-dom@5

这里为什么要用5的版本为啥不用最新的，原因在于老版本跟新版本写法不一样

老版本

import { HashRouter, Route, Switch, Redirect } from 'react-router-dom';render() {return (<HashRouter><Switch><Route exact path="/home" component={Home} /></Switch></HashRouter>)}

新版本

import { HashRouter, Route, Routes, Navigate} from 'react-router-dom';render() {return (<HashRouter><Routes><Route path="/login" element={<Login/>}></Route></Routes></HashRouter>)}

区别 以前是用Switch包裹现在用的是Routes 以前 组件是component=函数名，现在要写成组件形式并且是element=<组件名/>，以前重定向Redirect ,现在Navigate

了解以上这些 我们这里开始封装一些组件

这里我讲解两种方式

第一种异步加载路由

1.首先创建一个异步加载路由函数
asyncComponent.js

import React from "react";
export default function asyncComponent(importComponent) {class AsyncComponent extends React.Component {constructor(props) {super(props);this.state = {component: null};}async componentDidMount() {const { default: component } = await importComponent();this.setState({ component });}render() {            const Component = this.state.component;return Component ? <Component {...this.props} /> : null;}}return AsyncComponent;
}

2.创建路由容器文件
map.js

import asyncComponent from "./until/asyncComponent"; //引入刚才的函数
export default [{path: "/home",component: asyncComponent(() =>import(/* webpackChunkName: "modules/digitalVillage/index" */ "../views/home/index"))},{path: "/CodeScan/houseCode",component: asyncComponent(() =>import(/* webpackChunkName: "modules/digitalVillage/index" */ "../views/myself/index"))},
]

3.创建视图路由文件
touterView.js

//这里用的5点几版本  由于最新的里面要传组件 我传过去了但是没显示，有兴趣的可以去试一下最新的路由方式
import React from 'react';
import { HashRouter, Route, Switch, Redirect } from 'react-router-dom';
//这里定义重定向跟普通函数跳转
export const routeCreate = (props) => {  return { type: 'Route', props };
};
export const redirectCreate = (props) => {return { type: 'Redirect', props };
};
//最终返回的路由
export default class extends React.Component {renderItem = (item, index) => {let Component = null;const { type, props } = item;if (type === 'Route') {Component = Route;} else if (type === 'Redirect') {Component = Redirect;}return Component ? (<Component key={index} {...props} />) : null;};componentDidCatch(error, info) {console.error(error);console.log(info);}render() {const { data } = this.props;return (<HashRouter><Switch>{data.map((item, index) => this.renderItem(item, index))}</Switch></HashRouter>)}
}

4.创建路由中间件
index.js

import React from 'react';
import RouterView, { routeCreate, redirectCreate } from './until/routerView';
import routerMap from './map';
//
const routerData = [redirectCreate({ from: '/', to: '/CodeScan/houseCode', exact: true }),//重定向页...routerMap.map(routeCreate)
];
export default class extends React.Component {render() {return (<RouterView data={routerData} />);}
}

最终在app里面加载就好了

第二种方式路由的懒加载

1.创建一个懒加载lazy函数
npm i react-loadable

import React from 'react'
import Loadable from 'react-loadable';
import loadCom from "../../views/load" //懒加载等待页面自己定义
//过场组件默认采用通用的，若传入了loading，则采用传入的过场组件
export default (loader, loading = loadCom) => {return Loadable({loader,loading});
}

2.mapjs 路由容器

 import loadable from './until/loadLazy'export default [{path: "/home",component: loadable(() => import('../views/home'))},]

3.视图路由跟路由中间件是一样的

以上就是路由懒加载跟异步的封装