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How should I return HTML in a React.js class component without getting an error? [duplicate]

Matched leaf route at location "/" does not have an element. This means it will render an with a null value by default resulting in an "empty" page
//App.js File
import { BrowserRouter as Router, Routes, Route } from 'react-router-dom';
import Home from './pages/Home';
// import ReactDOM from "react-dom";
const App = () => {
return (
<Router >
<Routes>
<Route path="/" component={ Home }></Route>
</Routes>
</Router>
)
}
export default App;
**My any react router related code not working i don't know why it happend when i start insert some route in program so it show this error **

In V6, you can't use the component prop anymore. It was replaced in favor of element:
<Route path="/" element={<Home />}></Route>
More info in the migration doc.

I had the same problem. Replace component with element and it worked.
Replace this:
<Route path="/" component={HomePage} exact />
with this:
<Route path="/" element={<HomePage/>} exact />

I had the same error however my fix was slightly different
I had spelled element wrong.
<Route exact path='/MyGames' elemtent={<MyGames/>}/>
and this was the error it gave me in the browser console
Matched leaf route at location "/MyGames" does not have an element. This means it will render an <Outlet /> with a null value by default resulting in an "empty" page.

Very simple:
use element instead of component
wrap the your component like this: {<Home/>} instead of {Home}
<Route path="/" component={ <Home/> } />

in version 6:
component replaced with element and needs to close "</Route>"
<Route exact path="/" element={<AddTutorial />}></Route>
https://reactrouter.com/docs/en/v6/getting-started/overview

This is a common problem if you are using react-router-dom V6
To solve this it's simple
In your code
Replace component with element
Replace {home} with {}
This becomes...
<Route path="/" element={}>
This will definitely solve the problem.

If you're using react-router-dom 6 or above, you may have a routes array that includes parent and child routes. You may then try to open a route such as
/portal
and get this error because that component corresponds to a child route
/:customerid/portal
but you haven't read your routes (and their child routes) closely enough to see that.

having issues in understand path passed to react router

How does the two path differ . I tried going through the docs of react router but it still creates confusion .
First one is
<Route
path="/cricket/:description/:id"
component={xyz}
/>
and another is
<Route
exact
path="/cricket"
component={xyz1}
/>
I see that the first Route is mentioned in App.js .It leads to confusion as which one got executed and how ?

Router will render both componenets if path is something like /cricket/foo/123 because it matches both pattern.
If you want only one to render you have to use exact prop like
<Route exact path="/cricket"
component={xyz1}
/>

React router v4 prevent matching child routes

I encountered a problem with React Router v4 Switch component. I'm quite surprised that i couldn't find a relevant thread for this problem. A common Switch will look like this:
<Switch>
<Route path='/path1' component={Path1Component}/>
<Route path='/path2' component={Path2Component}/>
<Route exact path='/' component={Home}/>
<Route component={NotFound}/>
</Switch>
This means that when i'm on a path: '/' i get a Home component, on '/path1' i get a Path1Component and on path '/foobar' i get a NotFound component. And that is perfectly fine
However when i'm on '/path1/foobar' route i also get the Path1Component. This behaviour is not correct in every case - this time i do not want any nested routes for '/path1' route. '/path1/foobar' should get a NotFound component, any string, with '/' or without after '/path1' should return NotFound component.
What would be the preferred resolution to this problem? I could just add exact to every path, but wouldn't that be overbloating the code? I feel like that should be the default, but it's not the case.
Even on React Router v4 docs, like here. I see this problem - here '/will-match/foo' will also match. What are your thoughts?

There is a discussion here, but to make it short : it would break existing code. If this were to change, you'd have to do exact={false} if you want to match child routes without doing 'path1/child1'.

React Router V3 - Nested Route Component unmounts on path param change

I just noticed that in react router (v3.x) a component unmounts and remounts if a path param changes. Is this the expected behaviour?
Route:
<Route path="/landing/register/:step" component={Register}/>
Now, lets say I am on route "/landing/register/personal-data" and I am navigating via <Link/> or router.push({...}) to the next registration step "/landing/register/address", the Register-component gets first unmounted and then mounted again, loosing all its state.
Is this the correct way or am I doing something wrong?
EDIT:
It seems that the problem is that I am using nested routes, where I use a component for the parent route.
This example works (not re-mounting Register-Comp on path param change):
<Route path="/landing">
<Route path="register/:step" component={Register}></Route>
</Route>
But when I use a component for the parent route, it doesnt (not re-mounting AppView-Comp, but Register-Comp on path param change):
<Route path="/landing" component={AppView}>
<Route path="register/:step" component={Register}></Route>
</Route>

I solve this problem by nesting routes in child components, like this:
// Router class
<Route path="/landing/register" component={Register}/>
//Register component
<BrowserRouter>
<div>
<Route path="/landing/register/personal-data" component={PersonalData}/>
<Route path="/landing/register/payment-data" component={PaymentData}/>
...other routes
</div>
</BrowserRouter>
But in this case i store user data in redux store instead of component state, however you can store it on your component state it is not problem.

React Router Param

Is it possible to do this with react router?
<Route path="/:reset_password" component={ResetPassword} />
<Route path="/:create_password" component={CreatePassword}/>
I want use different param with different component. I test above code and it doesn't work. the code above work if I change to this:
<Route path="/something1/:reset_password" component={ResetPassword} />
<Route path="/something2/:create_password" component={CreatePassword}/>
thanks for the help

As #chris said, remove the colons and/or assign dedicated routes. React Router can't differentiate between the two routes you've supplied, as they're technically identical (root path + a dynamic parameter.)