React this.props.params undefined

问题

I have problem passing id to my page with product, i tried everything and search answer but it still does't work.

Here is my index.js:

import React from "react";
import {render} from "react-dom";
import {Router, Route, IndexRoute, hashHistory} from "react-router";

import {Menu} from './components/Menu';
import {MainPage} from './components/MainPage';
import {DetailsProduct} from './components/DetailsProduct';

class App extends React.Component{

    render(){
        return(
        <Router history={hashHistory}>
            {/* <IndexRoute component={Menu}></IndexRoute> */}
            <Route path="/" component={()=>(<div><Menu/><MainPage/></div>)}></Route>
            <Route path={"product/:id"} component={()=>(<div><Menu/><DetailsProduct>asd</DetailsProduct></div>)}></Route>
        </Router>
        )
    }
}

render(<App/>, window.document.getElementById("app"));

And DetailsProduct (page: http://localhost:8080/#/product/1)

import React from "react";    
export class DetailsProduct extends React.Component{

    render(){
        console.log(this.props.params); <-- this is undefined

        return(
            <h1>Product</h1>
        )
    }
}

回答1:

I was also getting the same problem when I used this.props.params.id.

But when i tried to put console.log(this.props) in the component where I'm passing the id, it shows my id in match object so use:

this.props.match.params.id

to get the id (notice the added match).

回答2:

For me I was using the render method and finding that this.props.match was undefined in rendered components. This was the solution for me, you have to pass in props.

this.props.match will be undefined for:

<Route path='/users/:id' render={() => <UserDetail/>}/>

Do this instead:

<Route path='/users/:id' render={(props) => <UserDetail {...props}/>}/>

https://reacttraining.com/react-router/web/api/Route/render-func

回答3:

replace this :

<Route path={"product/:id"} component={()=>(<div><Menu/><DetailsProduct>asd</DetailsProduct></div>)}></Route>

with :

<Route path={"product/:id"} component={DetailsProduct}></Route>

回答4:

react router new version changed the route props object as the following: this.props.match.params instead this.props.params

https://reacttraining.com/react-router/web/api/match

回答5:

I assume you are not using react-router v4 but either v2.x.x or v3.x.x. In that case you should restructure your routes and you can pass multiple component using the components props as

   <Router history={hashHistory}>
        <Route path="/" component={Layout}>
              <IndexRoute components={{menu: Menu, mainPage: MainPage}}/>
              <Route path={"product/:id"} component={{menu: Menu, detail: DetailsProduct}}/>
         </Route>
    </Router>

And in the Menu Component Also the way you want it work is relatively very easy to do using react-router v4. In that case you can make use of prop render to provide a component and you could do the following with it

import {HashRouter as Router, Route} from 'react-router-dom';
...
<Router>
    <Route path="/" render={()=>(<div><Menu/><MainPage/></div>)}></Route>
    <Route path={"product/:id"} render={()=>(<div><Menu/><DetailsProduct>asd</DetailsProduct></div>)}></Route>
</Router>

回答6:

I use

import { Router, Route, browserHistory, IndexRoute} from 'react-router'

and

import {syncHistoryWithStore, routerReducer} from 'react-router-redux'

then I can get id by this.props.params.id

来源：https://stackoverflow.com/questions/45144085/react-this-props-params-undefined

标签

javascript

reactjs

react-router