I'm pretty new to React. I'm trying to create a private route handler with the new release of react-router-dom v6, so I need to verify whether the user is authenticated or not in order to know if return the protected route or redirect the user to the login route.
import { Navigate } from 'react-router-dom';
import { useSelector } from 'react-redux';
import { isLogged } from '../helpers/isLogged';
export const PrivateRoute = async ({children}) => {
// Check if the user is authenticated
const userData = useSelector( store => store.user.object);
const logged = await isLogged(userData);
return logged
? children
: <Navigate to="/login" />;
}
The thing is i'm getting some errors due to this, but mainly the object promise one.
What's going on? Thanks in advance!
You can't declare a component async, because an async function returns a Promise, so when you'll use it won't be a component but a Promise object.
If you need to do an async operation you need to use the useEffect Hook :
export const PrivateRoute = ({ children }) => {
const [logged, setlLogged] = useState(false);
useEffect(() => {
isLogged(userData).then((res) => {
setIsUserLogged(res);
});
}, []);
// Check if the user is authenticated
const userData = useSelector((store) => store.user.object);
return logged ? children : <Navigate to="/login" />;
};
You can also use async/await inside the useEffect hook but it is a bit more tricky, i'll let you dig into that
So, thanks to Hugo could figure it out.
I also used this: React Hook Warnings for async function in useEffect: useEffect function must return a cleanup function or nothing
In a nutshell the solution was using useEffect and using a async function inside, and, while this is running, you could optionally rendering anything else, in my case "waiting...".
import { useEffect, useState } from 'react';
import { Navigate } from 'react-router-dom';
import { useSelector } from 'react-redux';
import { isLogged } from '../helpers/isLogged';
export const PrivateRoute = ({children}) => {
const userData = useSelector((store) => store.user.object);
const [logged, setLogged] = useState(false);
const [checking, setChecking] = useState(true);
useEffect(() => {
const checkAuth = async () => {
// Check if the user is authenticated
isLogged(userData).then((res) => {
setLogged(res);
// sets checking variable in false so the component can be rendered.
setChecking(false);
});
}
checkAuth();
}, [userData]);
if(checking){
// Renders 'wait' until isLogged is resolved with the data.
return (<h1>Wait...</h1>);
}
return logged ? children : <Navigate to="/login" />
}