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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Given the following Link (outdated v1):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=${backUrl}`} />
and in the , out dated usage of withRouter(CreateIdeaView) components render()withRouter higher order component:
console.log(this.props.match.params.testvalue, this.props.location.query.backurl)
// output
hello /some/other/value
And in a functional components using the useParams and useLocation hooks:
const CreatedIdeaView = () => {
const { testvalue } = useParams();
const { query, search } = useLocation();
console.log(testvalue, query.backUrl, new URLSearchParams(search).get('backUrl'))
return <span>{testvalue} {backurl}</span>
}
From the link that you posted on the docs, towards the bottom of the page:
Given a route like
<Route name="user" path="/users/:userId"/>
Updated code example with some stubbed query examples:
// import React, {Component, Props, ReactDOM} from 'react';
// import {Route, Switch} from 'react-router'; etc etc
// this snippet has it all attached to window since its in browser
const {
BrowserRouter,
Switch,
Route,
Link,
NavLink
} = ReactRouterDOM;
class World extends React.Component {
constructor(props) {
super(props);
console.dir(props);
this.state = {
fromIdeas: props.match.params.WORLD || 'unknown'
}
}
render() {
const { match, location} = this.props;
return (
<React.Fragment>
<h2>{this.state.fromIdeas}</h2>
<span>thing:
{location.query
&& location.query.thing}
</span><br/>
<span>another1:
{location.query
&& location.query.another1
|| 'none for 2 or 3'}
</span>
</React.Fragment>
);
}
}
class Ideas extends React.Component {
constructor(props) {
super(props);
console.dir(props);
this.state = {
fromAppItem: props.location.item,
fromAppId: props.location.id,
nextPage: 'world1',
showWorld2: false
}
}
render() {
return (
<React.Fragment>
<li>item: {this.state.fromAppItem.okay}</li>
<li>id: {this.state.fromAppId}</li>
<li>
<Link
to={{
pathname: `/hello/${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:
https://github.com/ReactTraining/react-router/blob/432dc9cf2344c772ab9f6379998aa7d74c1d43de/packages/react-router/docs/guides/migrating.md
https://github.com/ReactTraining/react-router/pull/3803
https://github.com/ReactTraining/react-router/pull/3669
https://github.com/ReactTraining/react-router/pull/3430
https://github.com/ReactTraining/react-router/pull/3443
https://github.com/ReactTraining/react-router/pull/3803
https://github.com/ReactTraining/react-router/pull/3636
https://github.com/ReactTraining/react-router/pull/3397
https://github.com/ReactTraining/react-router/pull/3288
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
there is a way you can pass more than one parameter. You can pass "to" as object instead of string.
// your route setup
<Route path="/category/:catId" component={Category} / >
// your link creation
const newTo = {
pathname: "/category/595212758daa6810cbba4104",
param1: "Par1"
};
// link to the "location"
// see (https://reacttraining.com/react-router/web/api/location)
<Link to={newTo}> </Link>
// In your Category Component, you can access the data like this
this.props.match.params.catId // this is 595212758daa6810cbba4104
this.props.location.param1 // this is Par1
I had the same problem to show an user detail from my application.
You can do this:
<Link to={'/ideas/'+this.props.testvalue }>Create Idea</Link>
or
<Link to="ideas/hello">Create Idea</Link>
and
<Route name="ideas/:value" handler={CreateIdeaView} />
to get this via this.props.match.params.value at your CreateIdeaView class.
You can see this video that helped me a lot: https://www.youtube.com/watch?v=ZBxMljq9GSE
See this post for reference
The simple is that:
<Link to={{
pathname: `your/location`,
state: {send anything from here}
}}
Now you want to access it:
this.props.location.state
as for react-router-dom 4.x.x (https://www.npmjs.com/package/react-router-dom) you can pass params to the component to route to via:
<Route path="/ideas/:value" component ={CreateIdeaView} />
linking via (considering testValue prop is passed to the corresponding component (e.g. the above App component) rendering the link)
<Link to={`/ideas/${ this.props.testValue }`}>Create Idea</Link>
passing props to your component constructor the value param will be available via
props.match.params.value
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