笔记十九*、选中高亮和嵌套路由使用

Myth丶恋晨 2024-05-01 16:23 3阅读 0赞

### 19.1 选中高亮 NavLink ###

App.jsx

import React from "react";
    import {NavLink, useRoutes} from "react-router-dom";
    import routes from "./routes/index.jsx";
    import "./app.css"
    
    const App = () => {
        const element = useRoutes(routes);
        // 选中高亮
        const activeStyle = ({isActive}) => {
            return isActive ? 'background' : "";
        };
        return (
            <div className="all">
                <div>
                    <div className="link">
                        <NavLink to="/home" className={activeStyle}>打开首页的页面</NavLink>
                    </div>
                    <div className="link">
                        <NavLink to="/about" className={activeStyle}>打开关于的页面</NavLink>
                    </div>
                </div>
                <div className="view">
                    {element}
                </div>
            </div>
        );
    }
    
    export default App;

### 19.2 嵌套路由 ###

home(首页的页面)中嵌套两个字路由，并对字路由设置选中高亮

Home/index.jsx -> 类组件

import React from "react";
    import {NavLink, Outlet} from "react-router-dom";
    
    class App extends React.Component {
    
        // 类组件中不能用const定义变量
        // 选中高亮
        activeStyle = ({isActive}) => {
            return isActive ? 'background' : "";
        };
    
        render() {
            return (
                <div>
                    首页的页面
                    <div style={
       {display: "flex", justifyContent: 'center', marginTop: '20px'}}>
                        <NavLink to='classify' className={this.activeStyle}>classify</NavLink>
                        <NavLink to='navigation' className={this.activeStyle}>navigation</NavLink>
                    </div>
                    <div style={
       {background: 'red'}}>
                        {/**/}
                        <Outlet/>
                    </div>
                </div>);
        }
    }
    
    export default App;

路由表 routes

import {Navigate} from "react-router-dom";
    import Home from "../components/Home";
    import About from "../components/About";
    import Classify from "../components/Home/components/Classify.jsx";
    import Navigation from "../components/Home/components/Navigation.jsx";
    
    export default [
        {
            path: '/home',
            element: <Home/>,
            children: [
                {
                    path: 'classify',
                    element:<Classify />
                },
                {
                    path: 'navigation',
                    element:<Navigation />
                },
            ]
        },
        {
            path: '/about',
            element: <About/>,
        },
        {
            path: '/',
            element: <Navigate to='about'/>,
        }
    ]

下面附一张文件结构图

![01002c6b753444919fabeed6638336d2.png][]

[01002c6b753444919fabeed6638336d2.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/05/01/586765e75c20400ba8283f235715b626.png