firebase-phone-no-auth-3.js

// This function runs when the 'sign-in-button' is clicked
// Takes the value from the 'phoneNumber' input and sends SMS to that phone number
function submitPhoneNumberAuth() {
    var phoneNumber = document.getElementById("phoneNumber").value;
    var appVerifier = window.recaptchaVerifier;
    firebase
    .auth()
    .signInWithPhoneNumber(phoneNumber, appVerifier)
    .then(function(confirmationResult) {
        window.confirmationResult = confirmationResult;
    })
    .catch(function(error) {
        console.log(error);
    });
}

// This function runs when the 'confirm-code' button is clicked
// Takes the value from the 'code' input and submits the code to verify the phone number
// Return a user object if the authentication was successful, and auth is complete
function submitPhoneNumberAuthCode() {
    var code = document.getElementById("code").value;
    confirmationResult
    .confirm(code)
    .then(function(result) {
        var user = result.user;
        console.log(user);
    })
    .catch(function(error) {
        console.log(error);
    });
}


//This function runs everytime the auth state changes. Use to verify if the user is logged in
firebase.auth().onAuthStateChanged(function(user) {
    if (user) {
        console.log("USER LOGGED IN")
    } else {
        // No user is signed in.
        console.log("USER NOT LOGGED IN")
    }
});