查竣工验收报告的网站,平台页面设计模板,怎么做网站关键词,ui设计难学么文章目录 1、Router1.1 路由1.2 认识React-Router1.3 Link和NavLink1.4 Navigate1.5 Not Found页面配置1.6 路由的嵌套1.7 手动路由的跳转1.7.1 在函数式组件中使用hook1.7.2 在类组件中封装高阶组件 1.8 动态路由传递参数1.9 路由的配置文件以及懒加载 1、Router
1.1 路由 1.… 文章目录 1、Router1.1 路由1.2 认识React-Router1.3 Link和NavLink1.4 Navigate1.5 Not Found页面配置1.6 路由的嵌套1.7 手动路由的跳转1.7.1 在函数式组件中使用hook1.7.2 在类组件中封装高阶组件 1.8 动态路由传递参数1.9 路由的配置文件以及懒加载 1、Router
1.1 路由 1.2 认识React-Router
npm install react-router-dom 1.3 Link和NavLink 1.4 Navigate import React, { PureComponent } from react;
import { Navigate } from react-router-dom;export class Login extends PureComponent {constructor(props) {super(props);this.state {isLogin: false,};}login() {this.setState({ isLogin: true });}render() {const { isLogin } this.state;return (divh1Login Page/h1{/* 如果没有登录的话显示登录按钮已经登录则跳转到/home页面 */}{!isLogin ? (button onClick{(e) this.login()}登录/button) : (Navigate to/home /)}/div);}
}export default Login;
1.5 Not Found页面配置 RoutesRoute path* element{NotFound /} //Routes1.6 路由的嵌套 1.7 手动路由的跳转 1.7.1 在函数式组件中使用hook 1.7.2 在类组件中封装高阶组件 1.8 动态路由传递参数 hoc
import {useLocation,useNavigate,useParams,useSearchParams,
} from react-router-dom;const withRouter (WrapperComponent) {return (props) {// 1.导航const navigate useNavigate();// 2.动态路由的参数 /detail/:idconst params useParams();// 3.查询字符串的参数: /user?namewhyage18const location useLocation();const [searchParams] useSearchParams();const query Object.fromEntries(searchParams);// Object.fromEntries([// [a, b],// [c, d],// ]);//Object{a:b, c:d}const router { navigate, params, location, query };return WrapperComponent {...props} router{router} /;};
};export default withRouter; import React, { PureComponent } from react
import { withRouter } from ../hocexport class Detail extends PureComponent {render() {const { router } this.propsconst { params } routerreturn (divh1Detail Page/h1h2id: {params.id}/h2/div)}
}export default withRouter(Detail)import React, { PureComponent } from react
import { withRouter } from ../hocexport class User extends PureComponent {render() {const { router } this.propsconst { query } routerreturn (divh1User: {query.name}-{query.age}/h1/div)}
}export default withRouter(User)1.9 路由的配置文件以及懒加载 import Home from ../pages/Home;
import HomeRecommend from ../pages/HomeRecommend;
import HomeRanking from ../pages/HomeRanking;
import HomeSongMenu from ../pages/HomeSongMenu;
// import About from ../pages/About
// import Login from ../pages/Login
import Category from ../pages/Category;
import Order from ../pages/Order;
import NotFound from ../pages/NotFound;
import Detail from ../pages/Detail;
import User from ../pages/User;
import { Navigate } from react-router-dom;
import React from react;// import 返回的是一个Promise
const About React.lazy(() import(../pages/About));
const Login React.lazy(() import(../pages/Login));const routes [{path: /,// 重定向element: Navigate to/home /,},{path: /home,element: Home /,children: [// 子路由{path: /home,element: Navigate to/home/recommend /,},{path: /home/recommend,element: HomeRecommend /,},{path: /home/ranking,element: HomeRanking /,},{path: /home/songmenu,element: HomeSongMenu /,},],},{path: /about,element: About /,},{path: /login,element: Login /,},{path: /category,element: Category /,},{path: /order,element: Order /,},{path: /detail/:id,element: Detail /,},{path: /user,element: User /,},{path: *,element: NotFound /,},
];export default routes; // import { StrictMode } from react
import ReactDOM from react-dom/client;
import App from ./App;
import { HashRouter } from react-router-dom;
import { Suspense } from react;const root ReactDOM.createRoot(document.querySelector(#root));
root.render(// StrictModeHashRouter// 需要加上Suspense 如果数据js 和 css文件还没请求回来就显示这里的内容Suspense fallback{h3Loading.../h3}App //Suspense/HashRouter// /StrictMode
);
