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@gragland
Last active August 27, 2022 15:16
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React Hook recipe from https://usehooks.com
// Top level App component
import React from "react";
import { ProvideAuth } from "./use-auth.js";
function App(props) {
return (
<ProvideAuth>
{/*
Route components here, depending on how your app is structured.
If using Next.js this would be /pages/_app.js
*/}
</ProvideAuth>
);
}
// Any component that wants auth state
import React from "react";
import { useAuth } from "./use-auth.js";
function Navbar(props) {
// Get auth state and re-render anytime it changes
const auth = useAuth();
return (
<NavbarContainer>
<Logo />
<Menu>
<Link to="/about">About</Link>
<Link to="/contact">Contact</Link>
{auth.user ? (
<Fragment>
<Link to="/account">Account ({auth.user.email})</Link>
<Button onClick={() => auth.signout()}>Signout</Button>
</Fragment>
) : (
<Link to="/signin">Signin</Link>
)}
</Menu>
</NavbarContainer>
);
}
// Hook (use-auth.js)
import React, { useState, useEffect, useContext, createContext } from "react";
import * as firebase from "firebase/app";
import "firebase/auth";
// Add your Firebase credentials
firebase.initializeApp({
apiKey: "",
authDomain: "",
projectId: "",
appID: ""
});
const authContext = createContext();
// Provider component that wraps your app and makes auth object ...
// ... available to any child component that calls useAuth().
export function ProvideAuth({ children }) {
const auth = useProvideAuth();
return <authContext.Provider value={auth}>{children}</authContext.Provider>;
}
// Hook for child components to get the auth object ...
// ... and re-render when it changes.
export const useAuth = () => {
return useContext(authContext);
};
// Provider hook that creates auth object and handles state
function useProvideAuth() {
const [user, setUser] = useState(null);
// Wrap any Firebase methods we want to use making sure ...
// ... to save the user to state.
const signin = (email, password) => {
return firebase
.auth()
.signInWithEmailAndPassword(email, password)
.then(response => {
setUser(response.user);
return response.user;
});
};
const signup = (email, password) => {
return firebase
.auth()
.createUserWithEmailAndPassword(email, password)
.then(response => {
setUser(response.user);
return response.user;
});
};
const signout = () => {
return firebase
.auth()
.signOut()
.then(() => {
setUser(false);
});
};
const sendPasswordResetEmail = email => {
return firebase
.auth()
.sendPasswordResetEmail(email)
.then(() => {
return true;
});
};
const confirmPasswordReset = (code, password) => {
return firebase
.auth()
.confirmPasswordReset(code, password)
.then(() => {
return true;
});
};
// Subscribe to user on mount
// Because this sets state in the callback it will cause any ...
// ... component that utilizes this hook to re-render with the ...
// ... latest auth object.
useEffect(() => {
const unsubscribe = firebase.auth().onAuthStateChanged(user => {
if (user) {
setUser(user);
} else {
setUser(false);
}
});
// Cleanup subscription on unmount
return () => unsubscribe();
}, []);
// Return the user object and auth methods
return {
user,
signin,
signup,
signout,
sendPasswordResetEmail,
confirmPasswordReset
};
}
@SimonChaumet
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It would be great to add a note for those who have an infinite loop to use useCallback on api functions : in my app I created an api loader and in the dependency list the linter always asks for my function in it, but when setting the user the function is recreated so is my loader and it creates an infinite loop.

@berbaroovez
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added typescript version
https://gist.github.com/berbaroovez/d6832dc280d2e0b1eca4f862bcf7df09
The User type is from firebase not sure what the import for that is

@lbustelo
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It would be great to add a note for those who have an infinite loop to use useCallback on api functions : in my app I created an api loader and in the dependency list the linter always asks for my function in it, but when setting the user the function is recreated so is my loader and it creates an infinite loop.

Should the useProvideAuth hook wrap all the provided functions in useCallback? If not… why?

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