We Keep Coding

Add a component as props inside a Route with react-router-dom

Having the following code:
import { Switch, Route, BrowserRouter as Router } from 'react-router-dom';
export function MyComponent({ list }: MyComponentProps) {
return (
<Router>
<Switch>
<Route path={list[0].url} component={<NextComponent />} />
</Switch>
</Router>
);
}
I want to load a different component on that route.
Version of react-router-dom is 5.2.0.
This code is not working, it appears a red line under <Route path... stating this:
Operator '<' cannot be applied to types 'number' and 'typeof Route'.ts(2365)
(alias) class Route<T extends {} = {}, Path extends string = string>
import Route
Any ideas?
LATER EDIT:
There is an answer stating that replacing that line with component={NextComponent} will get rid of the error message. That's true but is it possible to send props to that component in this case?
For example, for component={<NextComponent someProps={something} />} seems possible but not for component={NextComponent}

In react-router-dom v5 you don't specify the component prop as a JSX literal (the RRDv6 syntax), just pass a reference to the component.
component={NextComponent} instead of component={<NextComponent />}
Code
export function MyComponent({ list }: MyComponentProps) {
return (
<Router>
<Switch>
<Route path={list[0].url} component={NextComponent} />
</Switch>
</Router>
);
}
If you need to pass along additional props then you must use the render prop. This effectively renders an anonymous React component. Don't forgot you may need to also pass along the route props to the rendered components.
export function MyComponent({ list }: MyComponentProps) {
return (
<Router>
<Switch>
<Route
path={list[0].url}
render={props => <NextComponent {...props} something={value} />}
/>
</Switch>
</Router>
);
}
Route render methods

react-router v6 wrapped route component not working [duplicate]

This question already has answers here:
Error: [PrivateRoute] is not a <Route> component. All component children of <Routes> must be a <Route> or <React.Fragment>
(18 answers)
Closed last year.
How can you render a composed Route component
code example
Bottomline from above example is that in the following code, the Wrapped route will never render it's element
const App = () => (
<Routes>
<Wrapped/>
<Route path="/inline" element={<span >Inline works</span>} />
</Routes>
);
const Wrapped = () => <Route path="/wrapped" element={<span>wrapped</span>} />
Is there a way of doing this kind of composition with the Route component with react-router v6? Or will react-router v6 only support Route directly nested in the Routes component?
Edit, more specifically I'm trying to get a recommendation for using a ProtectedRoute component, something among the lines of:
type Props = {
element: ReactElement;
redirectRoute: string;
} & RouteProps;
const ProtectedRoute = ({element, redirectRoute, ...rest}: Props) => {
const {isAuthenticated} = useAuth();
<Route {...rest} element={isAuthenticated() ? element : <Navigate to={redirectRoute}/>}/>
}
EDIT:
It seems like this used to work in older beta versions, so this might be a bug. At the moment the latest version is 6.0.0-beta.4 &
I've logged an issue:
https://github.com/remix-run/react-router/issues/8066

In your code, you are trying to use Wrapped Component as a Router, but it's not. It's a React element returning a React Router element. Since you only need Router in this simple usecase, you can treat is as a function:
<Suspense fallback={null}>
<Routes>
{/* Use this as a normal function, and also function name etc.,*/}
{Wrapped()}
<Route path="/inline" element={<span>Inline works</span>} />
</Routes>
</Suspense>
However, I would recommend not to complicate the routes by trying to add customizations on route and instead wrap your component that you want to route.
For eg.,
const Wrapped = () => <Route path="/wrapped" element={<span>wrapped</span>} />;
to
<Route path="/wrapped" element={<Wrapped>wrapped component</Wrapped>} />

Or will react-router v6 only support Route directly nested in the Routes component?
Correct, RRv6 does not support route composition. Instead, try using your <Wrapped /> component inside the element prop. E.g.
<Route path="/foo" element={<Wrapped>/* something here */</Wrapped>} />

Passing props to dynamically rendered components in React

I have a page that is displaying several of my star components that each have their own name and a prop called starType
I am generating several different of these stars with the following code
if (num > 0) {
return (
<div className="starWrapper">
<Star
name={`${makeid()}`}
starType={`${starList[Math.floor(Math.random() * 6 + 1)]} ${posList[Math.floor(Math.random() * 9 + 1)]}`}
></Star>
{makeStars((num - 1))}
</div>
);
And this is the star component
<NavLink to={props.name}>
<h1 className="star-label">{props.name}</h1>
<div className={``}>
<div className={`starBall ${props.starType}`}></div>
</div>
</NavLink>
At the moment I want the user to be able to click on each star and have it lead to a page. I have achieved that with react-router's dynamic routing
<Route
exact
path="/:id"
render={(props) => <GenerateSystem {...props} />}
/>
the issue is I want the page that is generated from my generateSystem component to have the starType prop passed to it by the star component. I am aware of React's one way data flow and I think that might be the issue. How can I pass prop data from an auto generated component to another auto generated component?
My full code is viewable here. The components I'm talking about are in the interstellar-view and systems folder.

since you are passing name through URL params so passing starType using query params is an easy option.
So URL would look like this www.example.com/123?starType=red-giant
In your star.jsx, make a modification like this
<NavLink to={`/${props.name}?starType=${props.starType}`}>
...
</NavLink>
In your App.js, make a modification like this
<Switch >
<Route exact path="/:id" component={GenerateSystem} />
<Route exact path="/sol" component={SolSystem} />
<Route exact path="/" component={Interstellar} />
</Switch>
(We do not need to render and pass props since we can use useParams in GenerateSystem.js)
In your GenerateSystem.js, make a modification like this
import React from "react";
import { Link, useLocation, useParams } from "react-router-dom";
function useQuery() {
return new URLSearchParams(useLocation().search);
}
export const GenerateSystem = (props) => {
const {name} = useParams();
const query = useQuery();
const starType = query.get('starType')
return(<div className={starType}>System <p>{name}</p></div>)
}
Refs:
https://reactrouter.com/web/api/Hooks/useparams
https://reactrouter.com/web/example/query-parameters
EDIT:
You can use Redux-store/Context-API to have a global store, so that name and starType can be stored globally and can be accessed in different components

More Use-cases Example -> for other people that came here:
As in React-Router-Dom V6-> there is no render method any more,
See Why does have an element prop instead of render or component?
We mentioned this in the migration guide from v5 to v6, but it's worth repeating here.
In React Router v6 we switched from using v5's and APIs to . Why is that?...
So I needed another way of dynamically rendering all routes for the Router, with a pre declared array with all routes:
const routingList = [{title: 'Home', search: '/', component: Home, icon: 'fa-home'},{...}]
<Routes>
{
routingList.map((routing) => {
let Child = routing.component;
return <Route key={routing.search} path={routing.search} element={<Child {...routing.compProps} />} />;
})
}
<Route path="*" element={<Notfound />} />
</Routes>
(BTW: if you also need the useLocation or the other hooks, and you are using React Class and not React functions, see my answer here:
Component with router props - For: Hooks can only be called inside of the body of a function component
)

Private Route getting called dozens of times in React

I keep having maximum update depth exceeded errors and I can't figure out why.
I have the following (pared down, it was more complex originally and actually rendered the component) private route in a private route file:
class PrivateRoute extends Component {
render() {
console.log("private route");
return <Redirect to="/login" />;
}
}
export default connect(
mapStateToProps,
mapDispatchToProps
)(withKeycloak(PrivateRoute));
And then in my index.js I have the following:
<Route
render={({ location }) => {
const { pathname } = location;
return (
<TransitionGroup>
<CSSTransition
key={pathname}
classNames="page"
timeout={{
enter: 1000,
exit: 1000
}}
>
<Route
location={location}
render={() => (
<Switch>
<Route path="/login" component={LoginPage} />
<Route path="/signup/" component={Signup} />
<PrivateRoute
exact
path="/cards/"
component={Wrapper}
/>
<PrivateRoute
exact
path="/"
component={Wrapper}
/>
...
This should, as far as I can tell, go to the PrivateRoute component for Wrapper on initial load, and then, redirect to the login page, which should not invoke the private route.
Instead, I see:
52 private route
in my console log.
Why am I being redirected back to PrivateRoute dozens of times? Shouldn't this happen once, and that's it?
There's no redirect to anywhere else on the login page at all. There is a login function, but that requires a button click, which is not happening.
Any idea on why this could be happening?
The error message:
in Lifecycle (created by Context.Consumer)
in Redirect (at PrivateRoute.js:11)
in PrivateRoute (created by Context.Consumer)
in WithKeycloak(PrivateRoute) (created by Context.Consumer)
in Connect(WithKeycloak(PrivateRoute)) (at src/index.js:114)
in Switch (at src/index.js:106)
in Route (at src/index.js:103)
in Transition (created by CSSTransition)
in CSSTransition (at src/index.js:95)
in div (created by TransitionGroup)
Originally, the routes looked more like this:
class PrivateRoute extends Component {
render() {
return (
<Route
{...rest}
render={props =>
<Component {...props} />}
/>
)
}
}

rather than
<PrivateRoute
component={Wrapper}
/>
You want to do something like
<Route exact path="/"
render=(props => (<PrivateRoute exact
path="/"
component={Wrapper}>)) />
Otherwise it will just always render your PrivateRoute

Route component is expected to receive a prop exact in order to only render this component when a match exists.
If not exact prop passed, will render it. And then if another match, with render both, and this is why you are getting redirected everytime.
Since you are using a custom component, you must handle this prop to provide it into the Route component.
to fix it, you can follow #TKol approach for example.
<Route exact path="/"
render=(props => (<PrivateRoute
path="/"
component={Wrapper}>))
/>
This way Route is handling that for you and only will render 1 at time.

<Switch> component matching null value in react-router-4

I'm trying to migrate to use React Router 4 and having some trouble understanding the logic of the <Switch> component as it's used in the docs to handle a 404 (or unmatched) route.
For my entry JavaScript file, I have the following routes set up.
index.js
<Switch>
<Route path="/login" component={Login} />
<Route path="/forgot-password" component={ForgotPassword} />
<Route path="/email-verification" component={EmailVerification} />
<Route component={App} />
</Switch>
The Login component will check to see if the user is authenticated, and if so, redirect the user to the /dashboard route (via history.replace).
The App component is only accessible when the user is authenticated and it has a similar check to redirect the user to /login if she is not.
In my App component I have more specified routes that I can be sure are only accessible if the user is logged in.
App.js
<Switch>
<Route path="/dashboard" component={Dashboard} />
<Route path="/accounts" component={Account} />
<Authorize permissions={['view-admin']}>
<Route path="/admin" component={Admin} />
</Authorize>
<Route path="/users" component={Users} />
<Route component={NotFound} />
</Switch>
Herein lies my problem. The Authorize component checks against the permissions passed to see if the user has those permissions, if so, it renders the children directly, if not, it returns null from render().
The expected behavior here is that the <Route path="/admin" /> does not render at all when there are insufficient permissions and the <Route component={NotFound} /> component renders.
According to the docs:
A renders the first child that matches. A
with no path always matches.
However, if I go to any route declared after the <Authorize> component, the router is matching to null. This means that, based on the example above, going to /users returns null. Is the expected behavior of react-router to return the first match in a <Switch/> component, even if it's a null value?
How can I provide a "catch-all" route (404) for such a situation without creating a <PrivateRoute> component for each of the many, authenticated routes in App.js? Should a null value really produce a match?

Unfortunately, react-router's Switch component won't work with routes nested inside other components like in your example. If you check the docs for Switch, it says:
All children of a <Switch> should be <Route> or <Redirect> elements.
... so your Authorize component is not actually legal there as a direct child of Switch.
If you have a read through the source code of the Switch component, you'll see that it rather evilly reads the props of each of its children and manually applies react-router's matchPath method on each child's path (or from) prop to determine which one should be rendered.
So, what's happening in your case is Switch iterates through its children until it gets to your Authorize component. It then looks at that component's props, finding neither a path or from prop, and calls matchPath on an undefined path. As you note yourself, "a <Route> with no path always matches", so matchPath returns true, and Switch renders your Authorize component (ignoring any subsequent Routes or Redirects, since it believes it found a match). The nested '/admin' route inside your Authorize component doesn't match the current path however, so you get a null result back from the render.
I'm facing a similar situation at work. My plan to work around it is to replace react-router's Switch in my routing code with a custom component which iterates through its children, manually rendering each one in turn, and returning the result of the first one that returns something other than null. I'll update this answer when I've given it a shot.
Edit: Well, that didn't work. I couldn't work out a supported way to manually invoke "render" on the children. Sorry I couldn't give you a workaround to Switch's limitations.

In case anyone reads this in >= 2019, one way to deal with this behaviour is to simply wrap the Route-component like so:
import React from 'react'
import { Route } from 'react-router-dom'
type Props = {
permissions: string[]
componentWhenNotAuthorized?: React.ElementType
}
const AuthorizedRoute: React.FunctionComponent<Props> = ({
permissions,
componentWhenNotAuthorized: ComponentWhenNotAuthorized,
...rest
}) => {
const isAuthorized = someFancyAuthorizationLogic(permissions)
return isAuthorized
? <Route {...rest} />
: ComponentWhenNotAuthorized
? <ComponentWhenNotAuthorized {...rest} />
: null
}
export default AuthorizedRoute
Then, simply use it as such:
import React from 'react'
import { Route, Switch } from 'react-router-dom'
import AuthorizedRoute from 'some/path/AuthorizedRoute'
import Account from 'some/path/Account'
import Admin from 'some/path/Admin'
import Dashboard from 'some/path/Dashboard'
import NotFound from 'some/path/NotFound'
import Users from 'some/path/Users'
const AppRouter: React.FunctionComponent = () => (
<Switch>
<Route
component={Account}
path='/accounts'
/>
<AuthorizedRoute
component={Admin}
componentWhenNotAuthorized={NotFound}
path='/admin'
permissions={['view-admin']}
/>
<Route
component={Dashboard}
path='/dashboard'
/>
<Route
component={Users}
path='/users'
/>
<Route
component={NotFound}
/>
</Switch>
)
export default AppRouter

Similar idea to what Robert said, here's how I did it
class NullComponent extends React.Component {
shouldComponentBeRenderedByRoute() {
return false;
}
render() {
return null;
}
}
class CustomSwitch extends React.Component {
render() {
return (
// React.Children.map returns components even for null, which
const children = React.Children.toArray(this.props.children).map(child => {
const { render, shouldComponentBeRenderedByRoute } = child.type.prototype;
if (shouldComponentBeRenderedByRoute && !shouldComponentBeRenderedByRoute.call(child)) {
return null;
}
if (shouldComponentBeRenderedByRoute) {
return render.call(child);
}
return child;
});
return <Switch>{children}</Switch>;
);
}
}
then use it just do
<CustomSwitch>
<Route path... />
<NullComponent />
<Route path... />
</CustomSwitch>
here, a component without shouldComponentBeRenderedByRoute function is assumed to be a valid Route component from react-router, but you can add more condition (maybe use path props) to check if it's a valid Route