email.js

// These samples are intended for Web so this import would normally be
// done in HTML however using modules here is more convenient for
// ensuring sample correctness offline.
import firebase from "firebase/app";
import "firebase/auth";

function signInWithEmailPassword() {
  var email = "test@example.com";
  var password = "hunter2";
  // [START auth_signin_password]
  firebase.auth().signInWithEmailAndPassword(email, password)
    .then((userCredential) => {
      // Signed in
      var user = userCredential.user;
      // ...
    })
    .catch((error) => {
      var errorCode = error.code;
      var errorMessage = error.message;
    });
  // [END auth_signin_password]
}

function signUpWithEmailPassword() {
  var email = "test@example.com";
  var password = "hunter2";
  // [START auth_signup_password]
  firebase.auth().createUserWithEmailAndPassword(email, password)
    .then((userCredential) => {
      // Signed in 
      var user = userCredential.user;
      // ...
    })
    .catch((error) => {
      var errorCode = error.code;
      var errorMessage = error.message;
      // ..
    });
  // [END auth_signup_password]
}

function sendEmailVerification() {
  // [START auth_send_email_verification]
  firebase.auth().currentUser.sendEmailVerification()
    .then(() => {
      // Email verification sent!
      // ...
    });
  // [END auth_send_email_verification]
}

function sendPasswordReset() {
  const email = "sam@example.com";
  // [START auth_send_password_reset]
  firebase.auth().sendPasswordResetEmail(email)
    .then(() => {
      // Password reset email sent!
      // ..
    })
    .catch((error) => {
      var errorCode = error.code;
      var errorMessage = error.message;
      // ..
    });
  // [END auth_send_password_reset]
}