Verifying if the user is owner of the email address in firebase

Question

I am trying user Authentication using firebase.

For Email and password based authentication, I want to check whether the email input by the user in the form really belongs to the user, I can do so by sending a verification link to the user.

So, after the form is submitted and all other validation are complete, i tried the following code:

firebase.auth().createUserWithEmailAndPassword(this.state.email,this.state.password) .then(()=>{ var actionCodesettings={ url: 'https://localhost:3000/?email=' + firebase.auth().currentUser.email, handleCodeInApp: false } firebase.auth.currentUser.sendEmailVerification(actionCodesettings) .then(()=>{ console.log("Email Sent") }) .catch((error)=>{ console.log("Unexpected error occured") }) }) .catch((error)=>{ var errorCode = error.code; if(errorCode === 'auth/email-already-in-use'){ this.setState({ Message:"Email already Used" }) return; } else if(errorCode === 'auth/invalid-email'){ this.setState({ Message:"Email already Used" }) return; } else if(errorCode === 'auth/weak-password'){ this.setState({ Message:"Password is too Weak" }) return; } }) }

But I am not recieving any email,neither the message "Email Sent" is logged out.

samthecodingman · Accepted Answer · 2021-06-10 17:38:56Z

You are getting a syntax error because you have used firebase.auth.currentUser instead of firebase.auth().currentUser.

The reason you don't see this error is because you are ignoring it by not handling error codes that you don't expect. A good way to pick up on these types of bugs is to use a switch statement with a default fallback case.

firebase.auth().createUserWithEmailAndPassword(this.state.email,this.state.password) .then((result) => { var actionCodesettings={ url: 'https://localhost:3000/?email=' + result.user.email, handleCodeInApp: false } return result.user .sendEmailVerification(actionCodesettings); }) .then(() => { this.setState({ Message:"Please check your email to verify it." }); }) .catch((error)=>{ const errorCode = error.code; switch (errorCode) { case 'auth/email-already-in-use': this.setState({ Message:"This email has already been used" }); return; case 'auth/invalid-email': this.setState({ Message:"Email was invalid" }); return; case 'auth/weak-password': this.setState({ Message:"Please use a more secure password" }); return; default: console.error("Unexpected code while signing in and verifying user", error); this.setState({ Message:"Unexpected error. Please contact support." }); return; } });

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