react16 路由按需加载、路由权限配置
1. 路由按需加载:
不做按需加载,代码全部打包在bundle.js 文件里,首屏渲染很慢,项目文件较多,会出现1分钟加载的可能性。
import React, { Component } from 'react'; import Loadable from 'react-loadable'; // 按需加载依赖包 import {HashRouter,Route,Switch} from "react-router-dom" const Loading = () => <div>Loading...</div>; const A = Loadable({ //A页面 按需加载处理 loader: () => import('../pages/page1'), loading:Loading, }); const B = Loadable({ // B页面 按需加载处理 loader: () => import('../pages/page2'), loading:Loading, }); class App extends Component { render() { return ( <HashRouter> <Switch> <Route exact path={"/a"} component={A}/> // 加载A组件 <Route exact path={"/b"} component={B}/> <Route component={A}/> </Switch> </HashRouter> ); } } export default App;
如此简单;
2.路由权限配置
场景:后台管理系统,有用户管理(增删改查),订单管理(发货,删除,修改,查看),资金流水(收益查看,提现)等一系列模块,不同身份的人注册登录进来,展示不同的模块;
思路: (1) 注册登录进来,获取此人的权限,配置相应的路由。(2)浏览器刷新,需重新获取此人的权限,配置路由。
import React, { Component } from 'react'; import Loadable from 'react-loadable'; import Permission from "./permission" import {HashRouter,Route,Switch} from "react-router-dom" const Loading = () => <div>Loading...</div>; const A = Loadable({ loader: () => import('../pages/page1'), loading:Loading, }); const B = Loadable({ loader: () => import('../pages/page2'), loading:Loading, }); class App extends Component { render() { return ( <HashRouter> <Switch> <Route exact path={"/a"} component={A}/> <Route exact path={"/b"} component={B}/> <Route path={"/admin"} component={Permission}/> //需要权限访问的路由全部放置此组件里处理,permission组件 <Route component={A}/> </Switch> </HashRouter> ); } } export default App;
permission组件
import React,{Component} from "react" import {getPermissin} from "../actionCreaters" import {Route,Switch} from "react-router-dom" import {connect} from "react-redux" import A from "../pages/page1" class Permission extends Component{ render(){ if(this.props.permissions.length === 0 ){ //权限存储在redux中,如果只在登录或注册获取权限配置,刷新时,将被清空。所以实时的配置路由守卫里,当权限数组为空时,请求接口获取权限 this.props.requestForPermission(); return <div>请等待....</div> } const routers = this.props.permissions.map(item=>{ // 获取到权限进行路由配置 return <Route exact path={`/admin/${item.code}`} render={()=><div>欢迎{item.code}</div>} key={item.code}/> }); return <Switch> {routers} <Route component={A}/> //匹配不到此路由,跳转到A组件 </Switch>; } } export default connect((state)=>{ return { permissions:state.author.permissions } },(dispatch)=>{ return { requestForPermission(){ dispatch(getPermissin()); } } })(Permission);
如此简单;
接下来,什么项目都不怕啦~