Pass props in Link react-router

This line is missing path:

<Route name="ideas" handler={CreateIdeaView} />

Should be:

<Route name="ideas" path="/:testvalue" handler={CreateIdeaView} />

Given the following Link (outdated v1):

<Link to="ideas" params={{ testvalue: "hello" }}>Create Idea</Link>

Up to date as of v4/v5:

const backUrl="/some/other/value"
// this.props.testvalue === "hello"

// Using query
<Link to={{pathname: `/${this.props.testvalue}`, query: {backUrl}}} />

// Using search
<Link to={{pathname: `/${this.props.testvalue}`, search: `?backUrl=${backUrl}`} />
<Link to={`/${this.props.testvalue}?backUrl=${backUrl}`} />

~~and in the withRouter(CreateIdeaView) components render()~~, out dated usage of withRouter higher order component:

console.log(this.props.match.params.testvalue, this.props.location.query.backurl)
// output
hello /some/other/value

And in a functional components using the useParams and useLocation hooks:

const CreatedIdeaView = () => {
    const { testvalue } = useParams();
    const { query, search } = useLocation(); 
    console.log(testvalue, query.backUrl, new URLSearchParams(search).get('backUrl'))
    return <span>{testvalue} {backurl}</span>    
}

From the link that you posted on the docs, towards the bottom of the page:

Given a route like <Route name="user" path="/users/:userId"/>

Updated code example with some stubbed query examples:

// import React, {Component, Props, ReactDOM} from 'react';
// import {Route, Switch} from 'react-router'; etc etc
// this snippet has it all attached to window since its in browser
const {
  BrowserRouter,
  Switch,
  Route,
  Link,
  NavLink
} = ReactRouterDOM;

class World extends React.Component {
  constructor(props) {
    super(props);
    console.dir(props);      
    this.state = {
      fromIdeas: props.match.params.WORLD || 'unknown'
    }
  }
  render() {
    const { match, location} = this.props;
    return (
      <React.Fragment>
        <h2>{this.state.fromIdeas}</h2>
        <span>thing: 
          {location.query 
            && location.query.thing}
        </span><br/>
        <span>another1: 
        {location.query 
          && location.query.another1 
          || 'none for 2 or 3'}
        </span>
      </React.Fragment>
    );
  }
}

class Ideas extends React.Component {
  constructor(props) {
    super(props);
    console.dir(props);
    this.state = {
      fromAppItem: props.location.item,
      fromAppId: props.location.id,
      nextPage: 'world1',
      showWorld2: false
    }
  }
  render() {
    return (
      <React.Fragment>
          <li>item: {this.state.fromAppItem.okay}</li>
          <li>id: {this.state.fromAppId}</li>
          <li>
            <Link 
              to={{
                pathname: `/hello/${this.state.nextPage}`, 
                query:{thing: 'asdf', another1: 'stuff'}
              }}>
              Home 1
            </Link>
          </li>
          <li>
            <button 
              onClick={() => this.setState({
              nextPage: 'world2',
              showWorld2: true})}>
              switch  2
            </button>
          </li>
          {this.state.showWorld2 
           && 
           <li>
              <Link 
                to={{
                  pathname: `/hello/${this.state.nextPage}`, 
                  query:{thing: 'fdsa'}}} >
                Home 2
              </Link>
            </li> 
          }
        <NavLink to="/hello">Home 3</NavLink>
      </React.Fragment>
    );
  }
}


class App extends React.Component {
  render() {
    return (
      <React.Fragment>
        <Link to={{
          pathname:'/ideas/:id', 
          id: 222, 
          item: {
              okay: 123
          }}}>Ideas</Link>
        <Switch>
          <Route exact path="/ideas/:id/" component={Ideas}/>
          <Route path="/hello/:WORLD?/:thing?" component={World}/>
        </Switch>
      </React.Fragment>
    );
  }
}

ReactDOM.render((
  <BrowserRouter>
    <App />
  </BrowserRouter>
), document.getElementById('ideas'));

<script src="https://cdnjs.cloudflare.com/ajax/libs/react/16.6.3/umd/react.production.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/16.6.3/umd/react-dom.production.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react-router-dom/4.3.1/react-router-dom.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react-router/4.3.1/react-router.min.js"></script>

<div id="ideas"></div>

#updates:

See: https://github.com/ReactTraining/react-router/blob/0c6d51cd6639aff8a84b11d89e27887b3558ed8a/upgrade-guides/v2.0.0.md#link-to-onenter-and-isactive-use-location-descriptors

From the upgrade guide from 1.x to 2.x:

<Link to>, onEnter, and isActive use location descriptors

<Link to> can now take a location descriptor in addition to strings.
The query and state props are deprecated.

// v1.0.x
<Link to="/foo" query={{ the: 'query' }}/>
// v2.0.0
<Link to={{ pathname: '/foo', query: { the: 'query' } }}/>
// Still valid in 2.x
<Link to="/foo"/>
Likewise, redirecting from an onEnter hook now also uses a location
descriptor.

// v1.0.x
(nextState, replaceState) => replaceState(null, '/foo')
(nextState, replaceState) => replaceState(null, '/foo', { the: 'query' })
// v2.0.0
(nextState, replace) => replace('/foo')
(nextState, replace) => replace({ pathname: '/foo', query: { the: 'query' } })
For custom link-like components, the same applies for router.isActive,
previously history.isActive.

// v1.0.x
history.isActive(pathname, query, indexOnly)
// v2.0.0
router.isActive({ pathname, query }, indexOnly)

#updates for v3 to v4:

The interface is basically still the same as v2, best to look at the CHANGES.md for react-router, as that is where the updates are.

“legacy migration documentation” for posterity

More Related Contents:

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