react-router v6实现动态路由实例
前言
最近在肝一个后台管理项目,用的是react18 + ts 路由用的是v6,当需要实现根据权限动态加载路由表时,遇到了不少问题。
v6相比于v5做了一系列改动,通过路由表进行映射就是一个很好的改变(个人认为),但是怎么实现根据权限动态加载路由表呢?我也是网站上找了许多资料发现大部分还是以前版本的动态路由,要是按照现在的路由表来写肯定是不行的。难不成又要写成老版本那样错综复杂?只能自己来手写一个了,如有更好的方法望大佬们不吝赐教。
思路
大致思路就是:先只在路由表配置默认路由,例如登录页面,404页面。再等待用户登录成功后,获取到用户权限列表和导航列表,写一个工具函数递归调用得出路由表,在根据关键字映射成组件,最后返回得到新的路由表。
流程如下
- 用户登录成功
- 获取用户权限列表
- 获取用户导航菜单列表
- 根据权限和导航生成路由表
纸上谈来终觉浅,实际来看看吧。
实现动态路由
router/index.ts 默认路由
import { lazy } from "react"; import { Navigate } from "react-router-dom"; // React 组件懒加载 // 快速导入工具函数 const lazyLoad = (moduleName: string) => { const Module = lazy(() => import(`views/${moduleName}`)); return <Module />; }; // 路由鉴权组件 const Appraisal = ({ children }: any) => { const token = localStorage.getItem("token"); return token ? children : <Navigate to="/login" />; }; interface Router { name?: string; path: string; children?: Array<Router>; element: any; } const routes: Array<Router> = [ { path: "/login", element: lazyLoad("login"), }, { path: "/", element: <Appraisal>{lazyLoad("sand-box")}</Appraisal>, children: [ { path: "", element: <Navigate to="home" />, }, { path: "*", element: lazyLoad("sand-box/nopermission"), }, ], }, { path: "*", element: lazyLoad("not-found"), }, ]; export default routes;
redux login/action.ts
注意带 //import! 的标识每次导航列表更新时,再触发路由更新action
handelFilterRouter 就是根据导航菜单列表 和权限列表 得出路由表的
import { INITSIDEMENUS, UPDATUSERS, LOGINOUT, UPDATROUTES } from "./contant"; import { getSideMenus } from "services/home"; import { loginUser } from "services/login"; import { patchRights } from "services/right-list"; import { handleSideMenu } from "@/utils/devUtils"; import { handelFilterRouter } from "@/utils/routersFilter"; import { message } from "antd"; // 获取导航菜单列表 export const getSideMenusAction = (): any => { return (dispatch: any, state: any) => { getSideMenus().then((res: any) => { const rights = state().login.users.role.rights; const newMenus = handleSideMenu(res, rights); dispatch({ type: INITSIDEMENUS, menus: newMenus }); dispatch(updateRoutesAction()); //import! }); }; }; // 退出登录 export const loginOutAction = (): any => ({ type: LOGINOUT }); // 更新导航菜单 export const updateMenusAction = (item: any): any => { return (dispatch: any) => { patchRights(item).then((res: any) => { dispatch(getSideMenusAction()); }); }; }; // 路由更新 //import! export const updateRoutesAction = (): any => { return (dispatch: any, state: any) => { const rights = state().login.users.role.rights; const menus = state().login.menus; const routes = handelFilterRouter(rights, menus); //import! dispatch({ type: UPDATROUTES, routes }); }; }; // 登录 export const loginUserAction = (item: any, navigate: any): any => { return (dispatch: any) => { loginUser(item).then((res: any) => { if (res.length === 0) { message.error("用户名或密码错误"); } else { localStorage.setItem("token", res[0].username); dispatch({ type: UPDATUSERS, users: res[0] }); dispatch(getSideMenusAction()); navigate("/home"); } }); }; };
utils 工具函数处理
说一说我这里为什么要映射element 成对应组件这部操作,原因是我使用了redux-persist(redux持久化), 不熟悉这个插件的可以看看我这篇文章:redux-persist若是直接转换后存入本地再取出来渲染是会有问题的,所以需要先将element保存成映射路径,然后渲染前再进行一次路径映射出对应组件。
每个后台的数据返回格式都不一样,需要自己去转换,我这里的转换仅供参考。ps:defaulyRoutes和默认router/index.ts导出是一样的,可以做个小优化,复用起来。
import { lazy } from "react"; import { Navigate } from "react-router-dom"; // 快速导入工具函数 const lazyLoad = (moduleName: string) => { const Module = lazy(() => import(`views/${moduleName}`)); return <Module />; }; const Appraisal = ({ children }: any) => { const token = localStorage.getItem("token"); return token ? children : <Navigate to="/login" />; }; const defaulyRoutes: any = [ { path: "/login", element: lazyLoad("login"), }, { path: "/", element: <Appraisal>{lazyLoad("sand-box")}</Appraisal>, children: [ { path: "", element: <Navigate to="home" />, }, { path: "*", element: lazyLoad("sand-box/nopermission"), }, ], }, { path: "*", element: lazyLoad("not-found"), }, ]; // 权限列表 和 导航菜单 得出路由表 element暂用字符串表示 后面渲染前再映射 export const handelFilterRouter = ( rights: any, menus: any, routes: any = [] ) => { for (const menu of menus) { if (menu.pagepermisson) { let index = rights.findIndex((item: any) => item === menu.key) + 1; if (!menu.children) { if (index) { const obj = { path: menu.key, element: `sand-box${menu.key}`, }; routes.push(obj); } } else { handelFilterRouter(rights, menu.children, routes); } } } return routes; }; // 返回最终路由表 export const handelEnd = (routes: any) => { defaulyRoutes[1].children = [...routes, ...defaulyRoutes[1].children]; return defaulyRoutes; }; // 映射element 成对应组件 export const handelFilterElement = (routes: any) => { return routes.map((route: any) => { route.element = lazyLoad(route.element); return route; }); };
App.tsx
import routes from "./router"; import { useRoutes } from "react-router-dom"; import { shallowEqual, useSelector } from "react-redux"; import { useState, useEffect } from "react"; import { handelFilterElement, handelEnd } from "@/utils/routersFilter"; import { deepCopy } from "@/utils/devUtils"; function App() { console.log("first"); const [rout, setrout] = useState(routes); const { routs } = useSelector( (state: any) => ({ routs: state.login.routes }), shallowEqual ); const element = useRoutes(rout); // 监听路由表改变重新渲染 useEffect(() => { // deepCopy 深拷贝state数据 不能影响到store里的数据! // handelFilterElement 映射对应组件 // handelEnd 将路由表嵌入默认路由表得到完整路由表 const end = handelEnd(handelFilterElement(deepCopy(routs))); setrout(end); }, [routs]); return <div className="height-all">{element}</div>; } export default App;
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