I am learning react and I saw a video and the where using a question mark for an optional id parameter passed in the URL path like this
<Route path='/cart/:id?' element={< CartScreen />} exact/>
the ? next to id is not supposed to be taken as parameter in the URL The video I saw is from two years and i am using a newer react version I tried to search for the solution but no luck
It depends on which version of the react router you're using.
For V1, V2 and V3 optional parameters can be defined as:
<Route path='/cart(/:id)' element={< CartScreen />} exact/>
For React Router V4,V5 you can use:
<Route path='/cart/:id?' element={< CartScreen />} exact/>
As for React Router V6, it no longer supports optional routes but instead opts for nested Routes.
<Route path="/page/:friendlyName">
<Route path=":sort" element={<Page />} />
<Route path="" element={<Page />} />
</Route>
Official docs for changes going from V5 to V6. See the relative links section for more information.