react组件 如何获取URL 参数

Question

//客户端index.jsimportReactfrom'react';importReactDOMfrom'react-dom';import'./index.css';importAppfrom'./App';import{BrowserRouterasRouter,Route,Switch}from'react-router-dom'importregisterServiceWorkerfrom'./registerServiceWorker';ReactDOM.render(,document.getElementById('root'));App.jsclassAppextendsComponent{state={users:[],products:[]};steps=['纺纱','织布','后整','检查入库','发货'];componentDidMount(){console.log(this.props.params.client_id);//不对这里fetch('/supplies/320001').then(res=>res.json()).then(products=>this.setState({products}));}访问http://localhost:3000/supplies/320001http://localhost:3000/supplies/420001如何获取320001或420001

Answer 1

this.props.params.client_id你是在哪里定义的。
打印下this，看是不是当前组件的实例
另外打印下this.props.match.params
                            

Answer 2

@说好的一血呢this是当前组件，http://localhost:3000/supplies/320001320001是client_id.是不是用的不对？