笔记二十、使用路由Params进行传递参数

20.1、在父组件中设置路由参数

<NavLink to={`classify/${this.state.name}`} className={this.activeStyle}>classify</NavLink>

父组件 Home/index.jsx

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' : "";};state = {name: 'lcq-lcq'};render() {return (<div>首页的页面<div style={{display: "flex", justifyContent: 'center', marginTop: '20px'}}><NavLink to={`classify/${this.state.name}`} className={this.activeStyle}>classify</NavLink><NavLink to='navigation' className={this.activeStyle}>navigation</NavLink></div><div style={{background: 'red'}}>{/*<!-- Renders the child route's element, if there is one. -->*/}<Outlet/></div></div>);}
}export default App;

20.2 在路由表中设置路由参数

path: 'classify/:param',

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/:param',element:<Classify />},{path: 'navigation',element:<Navigation />},]},{path: '/about',element: <About/>,},{path: '/',element: <Navigate to='about'/>,}
]

20.3 在子组件中获取路由参数

import React from 'react';
import {useParams} from "react-router-dom";const Classify = () => {const params = useParams();console.log(params);return (<div>分类的页面<div>父组件home传递的参数：{params.param}</div></div>);
}export default Classify;