Sign in a user with an email address and password - firebase

firebase_mailpassword_authentication.js

//初始化 firebase	
var config = {
	apiKey: "<API_KEY>",
	authDomain: "<PROJECT_ID>.firebaseapp.com",
	databaseURL: "https://<DATABASE_NAME>.firebaseio.com",
	projectId: "<PROJECT_ID>",
	storageBucket: "<BUCKET>.appspot.com",
	messagingSenderId: "<SENDER_ID>",
};
firebase.initializeApp(config);

var email,
	password,
	user,
	name,
	email,
	photoUrl;

//註冊會員
function sign_up(){
	email = $('#account_signup').val();
	password = $('#password_signup').val();
	user = firebase.auth().currentUser;
	firebase.auth().createUserWithEmailAndPassword(email, password).then(function(user) {
		//註冊完後，可執行的動作
	}).catch(function(error){
    //註冊未成功的錯誤訊息
		var errorMessage = error.message;
		console.log(errorMessage);
	});
}

//修改使用者資料
function user_profile(){
	var user = firebase.auth().currentUser;
	name = $('#name_signup').val();
	var displayName = user.displayName,
		email = user.email,
		emailVerified = user.emailVerified,
		photoURL = user.photoURL;
  //firebase 可支援的參數有displayName、email、emailVerified、photoURL
  
	var profile = {displayName,email,emailVerified,photoURL}
	user.updateProfile(profile).then(function() {
    //將修改資料傳回firebase
		return user.updateProfile({'displayName': name});
	}).catch(function(error) {
    //修改資料未成功的錯誤訊息
		var errorMessage = error.message;
		console.log('profile error',errorMessage)
	});
}


//登入會員
function sign_in(){
	email = $('#account').val();
	password = $('#password').val();
	firebase.auth().signInWithEmailAndPassword(email, password).then(function(user) {
	  //登入成功
    console.log('login');
	}).catch(function(error) {
    //登入錯誤訊息
		var errorMessage = error.message;
		console.log(errorMessage);
	});
}

//取得用戶資料
function get_user_data(){
	firebase.auth().onAuthStateChanged(function(user) {
		if (user) {
      // 取得使用者的資料
		  console.log(user.displayName)
		} else {
		  // 使用者為登出狀態
		  console.log('not login')
		}
	  });
}