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
在这里插入图片描述

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'))
     },
 ]