diff --git a/typescript-practice/src/pages/index.html b/typescript-practice/src/pages/index.html
index bd438bd..810069e 100644
--- a/typescript-practice/src/pages/index.html
+++ b/typescript-practice/src/pages/index.html
@@ -250,7 +250,7 @@
             <div class="app__tabs">
               <button class="app__tab-item active">SUMMARY</button>
               <button class="app__tab-item">TRANSACTION DETAILS</button>
-              <div class="app__line left"></div>
+              <div class="app__line"></div>
             </div>
             <!-- Start content app -->
             <div class="app__contents">
diff --git a/typescript-practice/src/styles/pages/_index.scss b/typescript-practice/src/styles/pages/_index.scss
index 3e3b2f8..0ea8664 100644
--- a/typescript-practice/src/styles/pages/_index.scss
+++ b/typescript-practice/src/styles/pages/_index.scss
@@ -104,6 +104,8 @@
     &__line {
       position: absolute;
       top: 66px;
+      left: 152px;
+      width: 116px;
       height: 2px;
       background-color: $primary-color;
       border-radius: 10px;
diff --git a/typescript-practice/src/ts/constants/config.ts b/typescript-practice/src/ts/constants/config.ts
index d631bcd..dce8da0 100644
--- a/typescript-practice/src/ts/constants/config.ts
+++ b/typescript-practice/src/ts/constants/config.ts
@@ -11,14 +11,15 @@ export const LOCAL_STORAGE = {
   ACCESS_TOKEN: 'accessToken',
 };
 
-export enum TypeToast {
-  success = 'success',
-  error = 'error',
-}
-export enum MarkIcon {
-  success = 'success',
-  error = 'error',
-}
+export const TypeToast = {
+  success: 'success',
+  error: 'error',
+};
+
+export const MarkIcon = {
+  success: 'success',
+  error: 'error',
+};
 
 export const REGEX = {
   PASSWORD:
diff --git a/typescript-practice/src/ts/constants/messages/dialog.ts b/typescript-practice/src/ts/constants/messages.ts
similarity index 53%
rename from typescript-practice/src/ts/constants/messages/dialog.ts
rename to typescript-practice/src/ts/constants/messages.ts
index 5b5de7c..a3c69df 100644
--- a/typescript-practice/src/ts/constants/messages/dialog.ts
+++ b/typescript-practice/src/ts/constants/messages.ts
@@ -1,3 +1,17 @@
+export const PASSWORD_NOT_MATCH = 'Password not match!';
+
+export const PASSWORD_NOT_STRONG =
+  'Password must at least one uppercase, one lowercase letter, one number and one special character!';
+
+export const ERROR_CREDENTIAL = {
+  title: 'Error Credential',
+  message: 'Email or password not match! Please try again!',
+};
+
+export const INVALID_EMAIL_FORMAT = `The email is not correct!`;
+
+export const REQUIRED_MESSAGE = (field: string) => `The ${field} is required!`;
+
 export const ERROR_MESSAGE_DEFAULT = ['Something went wrong!'];
 
 export const TIME_OUT_ERROR = 'Connection time out! Please try again!';
diff --git a/typescript-practice/src/ts/constants/messages/form.ts b/typescript-practice/src/ts/constants/messages/form.ts
deleted file mode 100644
index 4491ead..0000000
--- a/typescript-practice/src/ts/constants/messages/form.ts
+++ /dev/null
@@ -1,13 +0,0 @@
-export const PASSWORD_NOT_MATCH = 'Password not match!';
-
-export const PASSWORD_NOT_STRONG =
-  'Password must at least one uppercase, one lowercase letter, one number and one special character!';
-
-export const ERROR_CREDENTIAL = {
-  title: 'Error Credential',
-  message: 'Email or password not match! Please try again!',
-};
-
-export const INVALID_EMAIL_FORMAT = `The email is not correct!`;
-
-export const REQUIRED_MESSAGE = (field: string) => `The ${field} is required!`;
diff --git a/typescript-practice/src/ts/controllers/homeController.ts b/typescript-practice/src/ts/controllers/homeController.ts
index 8388e76..f6c6a65 100644
--- a/typescript-practice/src/ts/controllers/homeController.ts
+++ b/typescript-practice/src/ts/controllers/homeController.ts
@@ -1,10 +1,10 @@
 import HomeView from 'views/home/homeView';
-import Transform from '../helpers/transform';
 import Service from 'services';
 import View from 'views';
 import Wallet from 'models/wallet';
 import Transaction from 'models/transaction';
 import Category from 'models/category';
+import { IHomeFunc } from 'global/types';
 
 export default class HomeController {
   public homeView: HomeView | null = null;
@@ -47,16 +47,17 @@ export default class HomeController {
 
   init() {
     if (this.homeView) {
-      this.homeView.initFunction(
-        this.handlerGetInfoUserLogin.bind(this),
-        this.handlerGetWalletByIdUser.bind(this),
-        this.handlerGetAllCategory.bind(this),
-        this.handlerGetAllTransactions.bind(this),
-        this.handlerSaveWallet.bind(this),
-        this.handlerSaveTransaction.bind(this),
-        this.handlerDeleteTransaction.bind(this),
-        new Transform(),
-      );
+      const func: IHomeFunc = {
+        getInfoUserLogin: this.handlerGetInfoUserLogin.bind(this),
+        getWalletByIdUser: this.handlerGetWalletByIdUser.bind(this),
+        getAllCategory: this.handlerGetAllCategory.bind(this),
+        getAllTransactions: this.handlerGetAllTransactions.bind(this),
+        saveWallet: this.handlerSaveWallet.bind(this),
+        saveTransaction: this.handlerSaveTransaction.bind(this),
+        deleteTransaction: this.handlerDeleteTransaction.bind(this),
+      };
+
+      this.homeView.initFunction(func);
 
       this.homeView.loadPage();
 
diff --git a/typescript-practice/src/ts/global/types.ts b/typescript-practice/src/ts/global/types.ts
index 98350cb..e4ef3c3 100644
--- a/typescript-practice/src/ts/global/types.ts
+++ b/typescript-practice/src/ts/global/types.ts
@@ -19,11 +19,13 @@ export class DataObject<T> {
   }
 }
 
-export interface TError {
+export interface IError {
   title: string;
   message: string;
 }
 
+export type TError = string | IError;
+
 export class CustomError extends Error {
   constructor(
     public title: string,
@@ -33,13 +35,6 @@ export class CustomError extends Error {
   }
 }
 
-export type TSignal = {
-  [key: string]: {
-    name: string;
-    handler: (value: Data) => void;
-  };
-};
-
 export interface Data {
   wallet?: Wallet;
   listTransactions?: Transaction[];
@@ -54,3 +49,50 @@ export interface ItemTransaction {
   note: string;
   amount: number;
 }
+
+export type Nullable<T> = T | null;
+export type PromiseVoid = () => Promise<void>;
+export type VoidFunc = () => void;
+export type PromiseOrNull<T> = () => Promise<T | null>;
+
+export interface IHomeFunc {
+  getInfoUserLogin?: PromiseOrNull<User>;
+  getWalletByIdUser?: (idUser: string) => Promise<Wallet | null>;
+  getAllCategory?: PromiseOrNull<Category[]>;
+  getAllTransactions?: (idUser: string) => Promise<Transaction[] | null>;
+  saveWallet?: (wallet: Wallet) => Promise<void>;
+  saveTransaction?: (transaction: Transaction) => Promise<void>;
+  deleteTransaction?: (idTransaction: string) => Promise<void>;
+}
+
+export interface IBudgetViewFunc {
+  showErrorToast: (error: TError) => void;
+  showSuccessToast: (title: string, message: string) => void;
+  toggleLoaderSpinner: VoidFunc;
+  saveTransaction: Nullable<(transaction: Transaction) => Promise<void>>;
+  loadTransactionData: PromiseVoid;
+  updateAmountWallet: PromiseVoid;
+  loadData: PromiseVoid;
+}
+
+export interface ITransactionViewFunc {
+  toggleLoaderSpinner: VoidFunc;
+  deleteTransaction: (idTransaction: string) => Promise<void>;
+  loadTransactionData: PromiseVoid;
+  updateAmountWallet: PromiseVoid;
+  loadData: PromiseVoid;
+  showSuccessToast: (title: string, message: string) => void;
+  showErrorToast: (error: TError) => void;
+  saveTransaction: (transaction: Transaction) => Promise<void>;
+}
+
+export interface IWalletViewFunc {
+  toggleLoaderSpinner: () => void;
+  saveWallet: ((wallet: Wallet) => Promise<void>) | null;
+  saveTransaction: ((transaction: Transaction) => Promise<void>) | null;
+  loadTransactionData: () => Promise<void>;
+  loadData: () => Promise<void>;
+  loadEvent: () => void;
+  showSuccessToast: (title: string, message: string) => void;
+  showErrorToast: (error: TError) => void;
+}
diff --git a/typescript-practice/src/ts/helpers/connect.ts b/typescript-practice/src/ts/helpers/connect.ts
index 39daafe..53d62e9 100644
--- a/typescript-practice/src/ts/helpers/connect.ts
+++ b/typescript-practice/src/ts/helpers/connect.ts
@@ -1,4 +1,4 @@
-import { TIME_OUT_ERROR } from '../constants/messages/dialog';
+import { TIME_OUT_ERROR } from '../constants/messages';
 import { TIME_OUT_SEC } from '../constants/config';
 import FirebaseService from '../services/firebaseService';
 
diff --git a/typescript-practice/src/ts/helpers/transform.ts b/typescript-practice/src/ts/helpers/evDataTrigger.ts
similarity index 65%
rename from typescript-practice/src/ts/helpers/transform.ts
rename to typescript-practice/src/ts/helpers/evDataTrigger.ts
index cadc84c..00178f7 100644
--- a/typescript-practice/src/ts/helpers/transform.ts
+++ b/typescript-practice/src/ts/helpers/evDataTrigger.ts
@@ -1,12 +1,25 @@
-import { TSignal, Data } from 'global/types';
+import { Data } from 'global/types';
+
+type TSignal = {
+  [key: string]: {
+    name: string;
+    handler: (value: Data) => void;
+  };
+};
+
+export default class EventDataTrigger {
+  private static _instance: EventDataTrigger;
 
-export default class Transform {
   public signal: TSignal;
 
   constructor() {
     this.signal = {};
   }
 
+  public static get Instance() {
+    return this._instance || (this._instance = new this());
+  }
+
   onSendSignal(fromClass: string, value: Data) {
     Object.keys(this.signal).forEach((key) => {
       const item = this.signal[key as keyof TSignal];
diff --git a/typescript-practice/src/ts/helpers/url.ts b/typescript-practice/src/ts/helpers/url.ts
index bf01a04..40e8f06 100644
--- a/typescript-practice/src/ts/helpers/url.ts
+++ b/typescript-practice/src/ts/helpers/url.ts
@@ -1,8 +1,8 @@
-export const redirectToLoginPage = (): void => {
+export const redirectToLoginPage = () => {
   window.location.replace('/login');
 };
 
-export const getSubdirectoryURL = () => {
+export const getSubdirectoryURL = (): string => {
   const url = window.location.href;
   const parts = url.split('/'); // Results: ['http:', '', 'example.com', '']
   const subDirectory = parts[3]; // Get subdirectory url only
diff --git a/typescript-practice/src/ts/helpers/validatorForm.ts b/typescript-practice/src/ts/helpers/validatorForm.ts
index 199f524..9cf70a5 100644
--- a/typescript-practice/src/ts/helpers/validatorForm.ts
+++ b/typescript-practice/src/ts/helpers/validatorForm.ts
@@ -1,5 +1,5 @@
 import { REGEX } from '../constants/config';
-import { REQUIRED_MESSAGE } from '../constants/messages/form';
+import { REQUIRED_MESSAGE } from '../constants/messages';
 
 /**
  * Validate password
@@ -21,7 +21,7 @@ export const compare2Password = (
   return password === passwordConfirm;
 };
 
-export const renderRequiredText = (field: string, element: Element): void => {
+export const renderRequiredText = (field: string, element: Element) => {
   const markup: string = `
     <p class="error-text">${REQUIRED_MESSAGE(field)}</p>
   `;
diff --git a/typescript-practice/src/ts/models/category.ts b/typescript-practice/src/ts/models/category.ts
index 71988bb..c1c10cc 100644
--- a/typescript-practice/src/ts/models/category.ts
+++ b/typescript-practice/src/ts/models/category.ts
@@ -1,11 +1,9 @@
 export default class Category {
-  readonly id: string;
-
-  url: string;
-
-  name: string;
-
-  constructor(id: string, url: string, name: string) {
+  constructor(
+    public id: string,
+    public url: string,
+    public name: string,
+  ) {
     this.id = id;
     this.url = url;
     this.name = name;
diff --git a/typescript-practice/src/ts/models/user.ts b/typescript-practice/src/ts/models/user.ts
index 9b2fa4c..e71f324 100644
--- a/typescript-practice/src/ts/models/user.ts
+++ b/typescript-practice/src/ts/models/user.ts
@@ -1,16 +1,13 @@
 import { generateId } from '../helpers/data';
 
 export default class User {
-  id: string;
-
-  email: string;
-
-  password: string;
-
-  accessToken: string;
-
-  constructor(email: string, password: string, accessToken?: string) {
-    this.id = generateId();
+  constructor(
+    public id: string,
+    public email: string,
+    public password: string,
+    public accessToken?: string,
+  ) {
+    this.id = id ? id : generateId();
     this.email = email;
     this.password = password || '';
     this.accessToken = accessToken || '';
diff --git a/typescript-practice/src/ts/models/wallet.ts b/typescript-practice/src/ts/models/wallet.ts
index 7e0e1a9..548da74 100644
--- a/typescript-practice/src/ts/models/wallet.ts
+++ b/typescript-practice/src/ts/models/wallet.ts
@@ -1,23 +1,14 @@
 import { generateId } from '../helpers/data';
 
 export default class Wallet {
-  id: string;
-
-  walletName: string;
-
-  inflow: number;
-
-  outflow: number;
-
-  idUser: string;
-
   constructor(
-    walletName: string,
-    inflow: number,
-    outflow: number,
-    idUser: string,
+    public id: string,
+    public walletName: string,
+    public inflow: number,
+    public outflow: number,
+    public idUser: string,
   ) {
-    this.id = generateId();
+    this.id = id ? id : generateId();
     this.walletName = walletName;
     this.inflow = inflow;
     this.outflow = outflow;
diff --git a/typescript-practice/src/ts/services/localStorageService.ts b/typescript-practice/src/ts/services/localStorageService.ts
index 5786cd5..5339fb3 100644
--- a/typescript-practice/src/ts/services/localStorageService.ts
+++ b/typescript-practice/src/ts/services/localStorageService.ts
@@ -5,7 +5,7 @@ class LocalStorageService {
     this.localStorage = localStorage;
   }
 
-  add(key: string, value: string): void {
+  add(key: string, value: string) {
     this.localStorage.setItem(key, value);
   }
 
@@ -13,11 +13,11 @@ class LocalStorageService {
     return this.localStorage.getItem(key);
   }
 
-  remove(key: string): void {
+  remove(key: string) {
     this.localStorage.removeItem(key);
   }
 
-  clear(): void {
+  clear() {
     this.localStorage.clear();
   }
 }
diff --git a/typescript-practice/src/ts/services/transactionService.ts b/typescript-practice/src/ts/services/transactionService.ts
index bb53cf9..54d8550 100644
--- a/typescript-practice/src/ts/services/transactionService.ts
+++ b/typescript-practice/src/ts/services/transactionService.ts
@@ -28,7 +28,7 @@ export default class TransactionService extends CommonService<Transaction> {
     return results || null;
   }
 
-  async deleteTransaction(idTransaction: string) {
+  async deleteTransaction(idTransaction: string): Promise<void> {
     await this.deleteData(idTransaction);
   }
 }
diff --git a/typescript-practice/src/ts/views/authenticationView.ts b/typescript-practice/src/ts/views/authenticationView.ts
index a045dcc..77089c7 100644
--- a/typescript-practice/src/ts/views/authenticationView.ts
+++ b/typescript-practice/src/ts/views/authenticationView.ts
@@ -1,27 +1,28 @@
 import CommonView from './commonView';
-import { ERROR_MESSAGE_DEFAULT } from '../constants/messages/dialog';
 import {
   INVALID_EMAIL_FORMAT,
   PASSWORD_NOT_MATCH,
   PASSWORD_NOT_STRONG,
-} from 'constants/messages/form';
+  ERROR_MESSAGE_DEFAULT,
+} from 'constants/messages';
 import {
   compare2Password,
   isValidPassword,
   isValidateEmail,
   renderRequiredText,
 } from '../helpers/validatorForm';
+import { Nullable } from 'global/types';
 
 export default class AuthenticationView extends CommonView {
-  public formEl: HTMLBodyElement | null;
+  public formEl: Nullable<HTMLBodyElement>;
 
-  public emailEl: HTMLBodyElement | null;
+  public emailEl: Nullable<HTMLBodyElement>;
 
   public messageDefault: string[];
 
-  public inputPasswordEl: HTMLBodyElement | null;
+  public inputPasswordEl: Nullable<HTMLBodyElement>;
 
-  public inputPasswordConfirmEl: HTMLBodyElement | null;
+  public inputPasswordConfirmEl: Nullable<HTMLBodyElement>;
 
   public listError: string[];
 
@@ -70,7 +71,7 @@ export default class AuthenticationView extends CommonView {
     return false;
   }
 
-  validatePasswordConfirm(password: string, passwordConfirm: string) {
+  validatePasswordConfirm(password: string, passwordConfirm: string): boolean {
     if (passwordConfirm) {
       if (!compare2Password(password, passwordConfirm)) {
         this.listError.push(PASSWORD_NOT_MATCH);
@@ -120,7 +121,7 @@ export default class AuthenticationView extends CommonView {
   /**
    * Add event listener for input field at form
    */
-  addHandlerInputFormChange(): void {
+  addHandlerInputFormChange() {
     if (this.formEl)
       this.formEl.addEventListener('input', () => {
         this.clearErrorMessage();
@@ -131,7 +132,7 @@ export default class AuthenticationView extends CommonView {
    * Show error message with error style input password.
    * @param {string} message The error message you want show in form.
    */
-  showError(message: string[]): void {
+  showError(message: string[]) {
     this.renderError(message);
   }
 
@@ -139,7 +140,7 @@ export default class AuthenticationView extends CommonView {
    * Show error message in form
    * @param {string} message The message will show in form
    */
-  renderError(messages = this.messageDefault): void {
+  renderError(messages = this.messageDefault) {
     if (messages.length > 0) {
       const messageItemMarkup = messages
         .map((message) => `<li>${message}</li>`)
diff --git a/typescript-practice/src/ts/views/commonView.ts b/typescript-practice/src/ts/views/commonView.ts
index f8ea0eb..32d2e71 100644
--- a/typescript-practice/src/ts/views/commonView.ts
+++ b/typescript-practice/src/ts/views/commonView.ts
@@ -1,17 +1,18 @@
+import { Nullable } from 'global/types';
 import { MarkIcon, TypeToast } from '../constants/config';
 
 export default class CommonView {
-  public toastDialog: HTMLDialogElement | null = null;
+  public toastDialog: Nullable<HTMLDialogElement> = null;
 
-  public toastIcon: HTMLBodyElement | null = null;
+  public toastIcon: Nullable<HTMLBodyElement> = null;
 
-  public toastBtn: HTMLBodyElement | null = null;
+  public toastBtn: Nullable<HTMLBodyElement> = null;
 
-  public toastTitle: HTMLBodyElement | null = null;
+  public toastTitle: Nullable<HTMLBodyElement> = null;
 
-  public toastContent: HTMLBodyElement | null = null;
+  public toastContent: Nullable<HTMLBodyElement> = null;
 
-  public spinner: HTMLBodyElement | null = null;
+  public spinner: Nullable<HTMLBodyElement> = null;
 
   constructor() {
     this.toastDialog = document.querySelector('.dialog .toast');
@@ -22,7 +23,7 @@ export default class CommonView {
   /**
    * Implement toast in site
    */
-  initToast(): void {
+  initToast() {
     const markup = `
       <dialog class="dialog">
         <div class="toast">
@@ -61,7 +62,7 @@ export default class CommonView {
   /**
    * Show or hide loader screen
    */
-  toggleLoaderSpinner(): void {
+  toggleLoaderSpinner() {
     if (this.spinner) this.spinner.classList.toggle('hidden');
   }
 
@@ -77,18 +78,21 @@ export default class CommonView {
     title: string,
     content: string,
     btnContent: string,
-  ): void {
+  ) {
     // Remove old typeToast class if haved
     Object.keys(TypeToast).forEach((key) => {
       CommonView.removeClassElement(
-        TypeToast[key as TypeToast],
+        TypeToast[key as keyof typeof TypeToast],
         this.toastDialog as HTMLBodyElement | null,
       );
     });
 
     // Remove old icon toast if haved
     Object.keys(MarkIcon).forEach((key) => {
-      CommonView.removeClassElement(MarkIcon[key as MarkIcon], this.toastIcon);
+      CommonView.removeClassElement(
+        MarkIcon[key as keyof typeof MarkIcon],
+        this.toastIcon,
+      );
     });
 
     // Init content toast
@@ -111,7 +115,7 @@ export default class CommonView {
     }
   }
 
-  static removeClassElement(classEl: string, el: HTMLBodyElement | null): void {
+  static removeClassElement(classEl: string, el: HTMLBodyElement | null) {
     if (el && el.classList.contains(classEl)) {
       el.classList.remove(classEl);
     }
@@ -120,7 +124,7 @@ export default class CommonView {
   /**
    * Add event listener for toast
    */
-  handleEventToast(): void {
+  handleEventToast() {
     if (this.toastBtn) {
       this.toastBtn.addEventListener('click', () => {
         if (this.toastDialog) this.toastDialog.close();
diff --git a/typescript-practice/src/ts/views/home/budgetView.ts b/typescript-practice/src/ts/views/home/budgetView.ts
index 425fca8..383fd7d 100644
--- a/typescript-practice/src/ts/views/home/budgetView.ts
+++ b/typescript-practice/src/ts/views/home/budgetView.ts
@@ -1,39 +1,43 @@
 import Transaction from '../../models/transaction';
 import { renderRequiredText } from '../../helpers/validatorForm';
-import { Data, TError } from 'global/types';
-import Transform from 'helpers/transform';
+import EventDataTrigger from 'helpers/evDataTrigger';
 import Wallet from 'models/wallet';
 import User from 'models/user';
 import { DEFAULT_CATEGORY } from 'constants/config';
+import { ADD_TRANSACTION_SUCCESS, DEFAULT_MESSAGE } from 'constants/messages';
 import {
-  ADD_TRANSACTION_SUCCESS,
-  DEFAULT_MESSAGE,
-} from 'constants/messages/dialog';
+  IBudgetViewFunc,
+  Data,
+  Nullable,
+  PromiseVoid,
+  TError,
+  VoidFunc,
+} from 'global/types';
 
 export default class BudgetView {
-  budgetDialog: HTMLDialogElement | null = null;
+  budgetDialog: Nullable<HTMLDialogElement> = null;
 
-  addBudgetBtn: HTMLElement | null = null;
+  addBudgetBtn: Nullable<HTMLElement> = null;
 
-  transform: Transform | null = null;
+  evDataTrigger: Nullable<EventDataTrigger> = null;
 
-  toggleLoaderSpinner: (() => void) | null = null;
+  toggleLoaderSpinner: Nullable<VoidFunc> = null;
 
-  saveTransaction: ((transaction: Transaction) => Promise<void>) | null = null;
+  saveTransaction: Nullable<(transaction: Transaction) => Promise<void>> = null;
 
-  loadTransactionData: (() => Promise<void>) | null = null;
+  loadTransactionData: Nullable<PromiseVoid> = null;
 
-  updateAmountWallet: (() => Promise<void>) | null = null;
+  updateAmountWallet: Nullable<PromiseVoid> = null;
 
-  loadData: (() => Promise<void>) | null = null;
+  loadData: Nullable<PromiseVoid> = null;
 
-  showSuccessToast: ((title: string, message: string) => void) | null = null;
+  showSuccessToast: Nullable<(title: string, message: string) => void> = null;
 
-  showErrorToast: ((error: string | TError) => void) | null = null;
+  showErrorToast: Nullable<(error: TError) => void> = null;
 
-  wallet: Wallet | null = null;
+  wallet: Nullable<Wallet> = null;
 
-  user: User | null = null;
+  user: Nullable<User> = null;
 
   constructor() {
     this.budgetDialog = document.getElementById(
@@ -44,34 +48,26 @@ export default class BudgetView {
     this.handlerEventBudgetView();
   }
 
-  initFunction(
-    showErrorToast: (error: string | TError) => void,
-    showSuccessToast: (title: string, message: string) => void,
-    toggleLoaderSpinner: () => void,
-    saveTransaction: ((transaction: Transaction) => Promise<void>) | null,
-    loadTransactionData: () => Promise<void>,
-    updateAmountWallet: () => Promise<void>,
-    loadData: () => Promise<void>,
-    transform: Transform | null,
-  ) {
-    this.showErrorToast = showErrorToast;
-    this.showSuccessToast = showSuccessToast;
-    this.toggleLoaderSpinner = toggleLoaderSpinner;
-    this.saveTransaction = saveTransaction;
-    this.loadTransactionData = loadTransactionData;
-    this.updateAmountWallet = updateAmountWallet;
-    this.loadData = loadData;
-    this.transform = transform;
+  initFunction(func: IBudgetViewFunc) {
+    this.showErrorToast = func.showErrorToast;
+    this.showSuccessToast = func.showSuccessToast;
+    this.toggleLoaderSpinner = func.toggleLoaderSpinner;
+    this.saveTransaction = func.saveTransaction;
+    this.loadTransactionData = func.loadTransactionData;
+    this.updateAmountWallet = func.updateAmountWallet;
+    this.loadData = func.loadData;
+
+    this.evDataTrigger = EventDataTrigger.Instance;
   }
 
   subscribe() {
-    this.transform!.create('budgetView', this.updateData.bind(this));
+    this.evDataTrigger!.create('budgetView', this.updateData.bind(this));
   }
 
   sendData() {
     const data = { wallet: this.wallet! };
 
-    this.transform!.onSendSignal('budgetView', data);
+    this.evDataTrigger!.onSendSignal('budgetView', data);
   }
 
   updateData(data: Data) {
@@ -110,7 +106,7 @@ export default class BudgetView {
     });
   }
 
-  async submitBudgetForm() {
+  async submitBudgetForm(): Promise<void> {
     try {
       const form = document.getElementById('formAddBudget') as HTMLFormElement;
       const formAddBudget = new FormData(form);
@@ -149,11 +145,11 @@ export default class BudgetView {
         (<HTMLFormElement>document.getElementById('formAddBudget')!).reset();
       }
     } catch (error) {
-      this.showErrorToast!(error as string | TError);
+      this.showErrorToast!(error as TError);
     }
   }
 
-  validateBudgetForm(date: string, amount: number) {
+  validateBudgetForm(date: string, amount: number): boolean {
     const inputFieldEl =
       this.budgetDialog!.querySelectorAll('.form__input-field');
 
diff --git a/typescript-practice/src/ts/views/home/categoryView.ts b/typescript-practice/src/ts/views/home/categoryView.ts
index 759428c..1124694 100644
--- a/typescript-practice/src/ts/views/home/categoryView.ts
+++ b/typescript-practice/src/ts/views/home/categoryView.ts
@@ -1,20 +1,20 @@
-import Transform from 'helpers/transform';
+import EventDataTrigger from 'helpers/evDataTrigger';
 import { REMOVE_CATEGORY } from '../../constants/config';
 import Category from 'models/category';
-import { Data } from 'global/types';
+import { Data, Nullable, PromiseOrNull } from 'global/types';
 
 export default class CategoryView {
-  categoryDialog: HTMLDialogElement | null = null;
+  categoryDialog: Nullable<HTMLDialogElement> = null;
 
-  categoryField: HTMLElement | null = null;
+  categoryField: Nullable<HTMLElement> = null;
 
-  closeIcon: HTMLElement | null = null;
+  closeIcon: Nullable<HTMLElement> = null;
 
-  getAllCategory: (() => Promise<Category[] | null>) | null = null;
+  getAllCategory: Nullable<PromiseOrNull<Category[]>> = null;
 
-  transform: Transform | null = null;
+  evDataTrigger: Nullable<EventDataTrigger> = null;
 
-  listCategory: Category[] | null = null;
+  listCategory: Nullable<Category[]> = null;
 
   categorySelected: string;
 
@@ -32,17 +32,17 @@ export default class CategoryView {
   }
 
   initFunction(
-    getAllCategory: () => Promise<Category[] | null>,
-    transform: Transform,
+    getAllCategory: PromiseOrNull<Category[]>,
+    evDataTrigger: EventDataTrigger,
   ) {
     this.getAllCategory = getAllCategory;
-    this.transform = transform;
+    this.evDataTrigger = evDataTrigger;
   }
 
   sendData() {
     const data: Data = { listCategories: this.listCategory! };
 
-    this.transform!.onSendSignal('categoryView', data);
+    this.evDataTrigger!.onSendSignal('categoryView', data);
   }
 
   handlerEventCategoryDialog() {
@@ -57,7 +57,7 @@ export default class CategoryView {
    * Load category data
    * @param {function} getAllCategory Get all category function
    */
-  async loadCategory() {
+  async loadCategory(): Promise<void> {
     if (!this.listCategory) {
       this.listCategory = await this.getAllCategory!();
 
diff --git a/typescript-practice/src/ts/views/home/homeView.ts b/typescript-practice/src/ts/views/home/homeView.ts
index 518a0fd..fea1d8f 100644
--- a/typescript-practice/src/ts/views/home/homeView.ts
+++ b/typescript-practice/src/ts/views/home/homeView.ts
@@ -4,11 +4,20 @@ import { clearAccessToken, formatNumber } from '../../helpers/data';
 
 import WalletView from './walletView';
 import Wallet from 'models/wallet';
-import Transform from 'helpers/transform';
+import EventDataTrigger from 'helpers/evDataTrigger';
 import Transaction from 'models/transaction';
 import User from 'models/user';
-import { Data, TError } from 'global/types';
-import { DEFAULT_TITLE_ERROR_TOAST } from 'constants/messages/dialog';
+import {
+  Data,
+  IBudgetViewFunc,
+  IHomeFunc,
+  ITransactionViewFunc,
+  IWalletViewFunc,
+  Nullable,
+  PromiseOrNull,
+  TError,
+} from 'global/types';
+import { DEFAULT_TITLE_ERROR_TOAST } from 'constants/messages';
 import { redirectToLoginPage } from 'helpers/url';
 import Category from 'models/category';
 import CategoryView from './categoryView';
@@ -41,31 +50,32 @@ export default class HomeView extends CommonView {
 
   amountInputs: NodeListOf<Element>;
 
-  user: User | null = null;
+  user: Nullable<User> = null;
 
-  wallet: Wallet | null = null;
+  wallet: Nullable<Wallet> = null;
 
-  listTransactions: Transaction[] | null = null;
+  listTransactions: Transaction[] = [];
 
   transactionDetails: TransactionDetail[] = [];
 
-  getInfoUserLogin: (() => Promise<User | null>) | null = null;
+  getInfoUserLogin: Nullable<PromiseOrNull<User>> = null;
 
-  getWalletByIdUser: ((idUser: string) => Promise<Wallet | null>) | null = null;
+  getWalletByIdUser: Nullable<(idUser: string) => Promise<Wallet | null>> =
+    null;
 
-  getAllCategory: (() => Promise<Category[] | null>) | null = null;
+  getAllCategory: Nullable<() => Promise<Category[] | null>> = null;
 
-  getAllTransactions:
-    | ((idUser: string) => Promise<Transaction[] | null>)
-    | null = null;
+  getAllTransactions: Nullable<
+    (idUser: string) => Promise<Transaction[] | null>
+  > = null;
 
-  deleteTransaction: ((idTransaction: string) => Promise<void>) | null = null;
+  deleteTransaction: Nullable<(idTransaction: string) => Promise<void>> = null;
 
-  saveWallet: ((wallet: Wallet) => Promise<void>) | null = null;
+  saveWallet: Nullable<(wallet: Wallet) => Promise<void>> = null;
 
-  saveTransaction: ((transaction: Transaction) => Promise<void>) | null = null;
+  saveTransaction: Nullable<(transaction: Transaction) => Promise<void>> = null;
 
-  transform: Transform | null = null;
+  evDataTrigger: Nullable<EventDataTrigger> = null;
 
   constructor() {
     super();
@@ -89,25 +99,17 @@ export default class HomeView extends CommonView {
     this.handleEventToast();
   }
 
-  initFunction(
-    getInfoUserLogin: () => Promise<User | null>,
-    getWalletByIdUser: (idUser: string) => Promise<Wallet | null>,
-    getAllCategory: () => Promise<Category[] | null>,
-    getAllTransactions: (idUser: string) => Promise<Transaction[] | null>,
-    saveWallet: (wallet: Wallet) => Promise<void>,
-    saveTransaction: (transaction: Transaction) => Promise<void>,
-    deleteTransaction: (idTransaction: string) => Promise<void>,
-    transform: Transform,
-  ) {
-    this.getInfoUserLogin = getInfoUserLogin;
-    this.getWalletByIdUser = getWalletByIdUser;
-    this.getAllCategory = getAllCategory;
-    this.getAllTransactions = getAllTransactions;
-    this.saveWallet = saveWallet;
-    this.saveTransaction = saveTransaction;
-    this.deleteTransaction = deleteTransaction;
+  // ----------------------- Init function ----------------------- //
+  initFunction(func: IHomeFunc) {
+    this.getInfoUserLogin = func.getInfoUserLogin || null;
+    this.getWalletByIdUser = func.getWalletByIdUser || null;
+    this.getAllCategory = func.getAllCategory || null;
+    this.getAllTransactions = func.getAllTransactions || null;
+    this.saveWallet = func.saveWallet || null;
+    this.saveTransaction = func.saveTransaction || null;
+    this.deleteTransaction = func.deleteTransaction || null;
 
-    this.transform = transform;
+    this.evDataTrigger = EventDataTrigger.Instance;
 
     // Init function for child view
     this.initWalletViewFunction();
@@ -119,57 +121,61 @@ export default class HomeView extends CommonView {
   }
 
   initTransactionViewFunction() {
-    this.transactionView.initFunction(
-      this.toggleLoaderSpinner.bind(this),
-      this.deleteTransaction!,
-      this.loadTransactionData.bind(this),
-      this.updateAmountWallet.bind(this),
-      this.loadData.bind(this),
-      this.showSuccessToast.bind(this),
-      this.showErrorToast.bind(this),
-      this.saveTransaction!,
-      this.transform,
-    );
+    const func: ITransactionViewFunc = {
+      toggleLoaderSpinner: this.toggleLoaderSpinner.bind(this),
+      deleteTransaction: this.deleteTransaction!,
+      loadTransactionData: this.loadTransactionData.bind(this),
+      updateAmountWallet: this.updateAmountWallet.bind(this),
+      loadData: this.loadData.bind(this),
+      showSuccessToast: this.showSuccessToast.bind(this),
+      showErrorToast: this.showErrorToast.bind(this),
+      saveTransaction: this.saveTransaction!,
+    };
+
+    this.transactionView.initFunction(func);
   }
 
   initBudgetViewFunction() {
-    this.budgetView.initFunction(
-      this.showErrorToast.bind(this),
-      this.showSuccessToast.bind(this),
-      this.toggleLoaderSpinner.bind(this),
-      this.saveTransaction!.bind(this),
-      this.loadTransactionData.bind(this),
-      this.updateAmountWallet.bind(this),
-      this.loadData.bind(this),
-      this.transform,
-    );
+    const func: IBudgetViewFunc = {
+      showErrorToast: this.showErrorToast.bind(this),
+      showSuccessToast: this.showSuccessToast.bind(this),
+      toggleLoaderSpinner: this.toggleLoaderSpinner.bind(this),
+      saveTransaction: this.saveTransaction!.bind(this),
+      loadTransactionData: this.loadTransactionData.bind(this),
+      updateAmountWallet: this.updateAmountWallet.bind(this),
+      loadData: this.loadData.bind(this),
+    };
+
+    this.budgetView.initFunction(func);
   }
 
   initCategoryViewFunction() {
-    this.categoryView.initFunction(this.getAllCategory!, this.transform!);
+    this.categoryView.initFunction(this.getAllCategory!, this.evDataTrigger!);
   }
 
   initSummaryTabViewFunction() {
-    this.summaryTabView.initFunction(this.transform!);
+    this.summaryTabView.initFunction(this.evDataTrigger!);
   }
 
   initTransactionTabViewFunction() {
-    this.transactionTabView.initFunction(this.transform!);
+    this.transactionTabView.initFunction(this.evDataTrigger!);
   }
 
   initWalletViewFunction() {
-    this.walletView.initFunction(
-      this.transform,
-      this.toggleLoaderSpinner.bind(this),
-      this.saveWallet,
-      this.saveTransaction,
-      this.loadTransactionData.bind(this),
-      this.loadData.bind(this),
-      this.loadEvent.bind(this),
-      this.showSuccessToast.bind(this),
-      this.showErrorToast.bind(this),
-    );
+    const func: IWalletViewFunc = {
+      toggleLoaderSpinner: this.toggleLoaderSpinner.bind(this),
+      saveWallet: this.saveWallet,
+      saveTransaction: this.saveTransaction,
+      loadTransactionData: this.loadTransactionData.bind(this),
+      loadData: this.loadData.bind(this),
+      loadEvent: this.loadEvent.bind(this),
+      showSuccessToast: this.showSuccessToast.bind(this),
+      showErrorToast: this.showErrorToast.bind(this),
+    };
+
+    this.walletView.initFunction(func);
   }
+  // ----------------------- End ----------------------- //
 
   subscribeListenerData() {
     this.subscribe();
@@ -180,7 +186,7 @@ export default class HomeView extends CommonView {
     this.walletView.subscribe();
   }
 
-  async loadData() {
+  async loadData(): Promise<void> {
     // Send data to other class
     this.sendData();
 
@@ -195,7 +201,7 @@ export default class HomeView extends CommonView {
     await this.updateAmountWallet();
   }
 
-  async loadPage() {
+  async loadPage(): Promise<void> {
     this.toggleLoaderSpinner();
     const user = await this.getInfoUserLogin!();
 
@@ -229,7 +235,7 @@ export default class HomeView extends CommonView {
   // ---------------------LOAD DATA---------------------//
 
   subscribe() {
-    this.transform!.create('homeView', this.updateData.bind(this));
+    this.evDataTrigger!.create('homeView', this.updateData.bind(this));
   }
 
   sendData() {
@@ -239,7 +245,7 @@ export default class HomeView extends CommonView {
       user: this.user!,
     };
 
-    this.transform!.onSendSignal('homeView', data);
+    this.evDataTrigger!.onSendSignal('homeView', data);
   }
 
   updateData(data: Data) {
@@ -251,7 +257,7 @@ export default class HomeView extends CommonView {
   /**
    * Load wallet user
    */
-  async loadWalletUser() {
+  async loadWalletUser(): Promise<void> {
     const wallet = this.wallet
       ? this.wallet
       : await this.getWalletByIdUser!(this.user!.id);
@@ -273,13 +279,15 @@ export default class HomeView extends CommonView {
     this.saveWallet!(this.wallet!);
   }
 
-  async loadTransactionData() {
-    this.listTransactions = await this.getAllTransactions!(this.wallet!.idUser);
+  async loadTransactionData(): Promise<void> {
+    const data = await this.getAllTransactions!(this.wallet!.idUser);
+
+    if (data) this.listTransactions = data;
 
     this.sendData();
   }
 
-  async updateAmountWallet() {
+  async updateAmountWallet(): Promise<void> {
     let inflow = 0;
     let outflow = 0;
     // Init data first
@@ -315,7 +323,7 @@ export default class HomeView extends CommonView {
    * Implement error toast in site
    * @param {string} content The content will show in error toast
    */
-  showErrorToast(error: TError | string): void {
+  showErrorToast(error: TError) {
     const title =
       typeof error === 'object' && error.title
         ? error.title
diff --git a/typescript-practice/src/ts/views/home/summaryTabView.ts b/typescript-practice/src/ts/views/home/summaryTabView.ts
index 75277e0..eae2560 100644
--- a/typescript-practice/src/ts/views/home/summaryTabView.ts
+++ b/typescript-practice/src/ts/views/home/summaryTabView.ts
@@ -1,25 +1,25 @@
-import Transform from 'helpers/transform';
+import EventDataTrigger from 'helpers/evDataTrigger';
 import { formatNumber } from '../../helpers/data';
-import { Data } from 'global/types';
+import { Data, Nullable } from 'global/types';
 import Wallet from 'models/wallet';
 import Transaction from 'models/transaction';
 import Category from 'models/category';
 
 export default class SummaryTabView {
-  transform: Transform | null = null;
+  evDataTrigger: Nullable<EventDataTrigger> = null;
 
-  wallet: Wallet | null = null;
+  wallet: Nullable<Wallet> = null;
 
   listTransactions: Transaction[] = [];
 
   listCategories: Category[] = [];
 
-  initFunction(transform: Transform) {
-    this.transform = transform;
+  initFunction(evDataTrigger: EventDataTrigger) {
+    this.evDataTrigger = evDataTrigger;
   }
 
   subscribe() {
-    this.transform!.create('summaryTabView', this.updateData.bind(this));
+    this.evDataTrigger!.create('summaryTabView', this.updateData.bind(this));
   }
 
   updateData(data: Data) {
diff --git a/typescript-practice/src/ts/views/home/transactionTabView.ts b/typescript-practice/src/ts/views/home/transactionTabView.ts
index b39e265..c365ea5 100644
--- a/typescript-practice/src/ts/views/home/transactionTabView.ts
+++ b/typescript-practice/src/ts/views/home/transactionTabView.ts
@@ -1,4 +1,4 @@
-import Transform from 'helpers/transform';
+import EventDataTrigger from 'helpers/evDataTrigger';
 import {
   createTransactionDetailObject,
   getAllCategoryNameInTransactions,
@@ -6,7 +6,7 @@ import {
 } from '../../helpers/data';
 import { formatNumber } from '../../helpers/data';
 import TransactionView from './transactionView';
-import { Data } from 'global/types';
+import { Data, Nullable } from 'global/types';
 import Wallet from 'models/wallet';
 import Transaction from 'models/transaction';
 import Category from 'models/category';
@@ -15,9 +15,9 @@ import TransactionDetail from 'models/transactionDetail';
 export default class TransactionTabView {
   transactionView: TransactionView;
 
-  transform: Transform | null = null;
+  evDataTrigger: Nullable<EventDataTrigger> = null;
 
-  wallet: Wallet | null = null;
+  wallet: Nullable<Wallet> = null;
 
   listTransactions: Transaction[] = [];
 
@@ -30,12 +30,15 @@ export default class TransactionTabView {
     this.addEventTransactionItem();
   }
 
-  initFunction(transform: Transform) {
-    this.transform = transform;
+  initFunction(evDataTrigger: EventDataTrigger) {
+    this.evDataTrigger = evDataTrigger;
   }
 
   subscribe() {
-    this.transform!.create('transactionTabView', this.updateData.bind(this));
+    this.evDataTrigger!.create(
+      'transactionTabView',
+      this.updateData.bind(this),
+    );
   }
 
   updateData(data: Data) {
@@ -46,7 +49,7 @@ export default class TransactionTabView {
     if (data.listCategories) this.listCategories = data.listCategories;
   }
 
-  async loadTransactionTab() {
+  async loadTransactionTab(): Promise<void> {
     // Load category
     // Init data first
     this.transactionDetails = this.loadTransactionDetailsData();
@@ -100,7 +103,7 @@ export default class TransactionTabView {
   }
 
   // eslint-disable-next-line class-methods-use-this
-  transactionDetailMarkup(transactionDetail: TransactionDetail) {
+  transactionDetailMarkup(transactionDetail: TransactionDetail): string {
     const itemTransaction = () => {
       const listMarkup: string[] = [];
 
diff --git a/typescript-practice/src/ts/views/home/transactionView.ts b/typescript-practice/src/ts/views/home/transactionView.ts
index 81122b2..dd806eb 100644
--- a/typescript-practice/src/ts/views/home/transactionView.ts
+++ b/typescript-practice/src/ts/views/home/transactionView.ts
@@ -1,19 +1,26 @@
 import Transaction from 'models/transaction';
 import defaultCategoryIcon from '../../../assets/images/question-icon.svg';
 import CategoryView from './categoryView';
-import Transform from 'helpers/transform';
-import { Data, TError } from 'global/types';
+import EventDataTrigger from 'helpers/evDataTrigger';
+import {
+  Data,
+  ITransactionViewFunc,
+  Nullable,
+  PromiseVoid,
+  TError,
+  VoidFunc,
+} from 'global/types';
 import Wallet from 'models/wallet';
 import Category from 'models/category';
 import {
   ADD_TRANSACTION_SUCCESS,
   DEFAULT_MESSAGE,
   UPDATE_TRANSACTION_SUCCESS,
-} from 'constants/messages/dialog';
+} from 'constants/messages';
 import { renderRequiredText } from 'helpers/validatorForm';
 
 export default class TransactionView {
-  wallet: Wallet | null = null;
+  wallet: Nullable<Wallet> = null;
 
   listTransactions: Transaction[] = [];
 
@@ -21,29 +28,29 @@ export default class TransactionView {
 
   categoryView: CategoryView;
 
-  addTransactionBtn: HTMLElement | null = null;
+  addTransactionBtn: Nullable<HTMLElement> = null;
 
-  transactionDialog: HTMLDialogElement | null = null;
+  transactionDialog: Nullable<HTMLDialogElement> = null;
 
-  transactionForm: HTMLFormElement | null = null;
+  transactionForm: Nullable<HTMLFormElement> = null;
 
-  toggleLoaderSpinner: (() => void) | null = null;
+  toggleLoaderSpinner: Nullable<VoidFunc> = null;
 
-  deleteTransaction: ((idTransaction: string) => Promise<void>) | null = null;
+  deleteTransaction: Nullable<(idTransaction: string) => Promise<void>> = null;
 
-  loadTransactionData: (() => Promise<void>) | null = null;
+  loadTransactionData: Nullable<PromiseVoid> = null;
 
-  updateAmountWallet: (() => Promise<void>) | null = null;
+  updateAmountWallet: Nullable<PromiseVoid> = null;
 
-  loadData: (() => Promise<void>) | null = null;
+  loadData: Nullable<PromiseVoid> = null;
 
   showSuccessToast: ((title: string, message: string) => void) | null = null;
 
-  showErrorToast: ((error: string | TError) => void) | null = null;
+  showErrorToast: ((error: TError) => void) | null = null;
 
-  saveTransaction: ((transaction: Transaction) => Promise<void>) | null = null;
+  saveTransaction: Nullable<(transaction: Transaction) => Promise<void>> = null;
 
-  transform: Transform | null = null;
+  evDataTrigger: EventDataTrigger | null = null;
 
   constructor(categoryView: CategoryView) {
     this.addTransactionBtn = document.getElementById('addTransaction');
@@ -59,30 +66,21 @@ export default class TransactionView {
     this.categoryView = categoryView;
   }
 
-  initFunction(
-    toggleLoaderSpinner: () => void,
-    deleteTransaction: (idTransaction: string) => Promise<void>,
-    loadTransactionData: () => Promise<void>,
-    updateAmountWallet: () => Promise<void>,
-    loadData: () => Promise<void>,
-    showSuccessToast: (title: string, message: string) => void,
-    showErrorToast: (error: string | TError) => void,
-    saveTransaction: (transaction: Transaction) => Promise<void>,
-    transform: Transform | null,
-  ) {
-    this.toggleLoaderSpinner = toggleLoaderSpinner;
-    this.deleteTransaction = deleteTransaction;
-    this.loadTransactionData = loadTransactionData;
-    this.updateAmountWallet = updateAmountWallet;
-    this.loadData = loadData;
-    this.showSuccessToast = showSuccessToast;
-    this.showErrorToast = showErrorToast;
-    this.saveTransaction = saveTransaction;
-    this.transform = transform;
+  initFunction(func: ITransactionViewFunc) {
+    this.toggleLoaderSpinner = func.toggleLoaderSpinner;
+    this.deleteTransaction = func.deleteTransaction;
+    this.loadTransactionData = func.loadTransactionData;
+    this.updateAmountWallet = func.updateAmountWallet;
+    this.loadData = func.loadData;
+    this.showSuccessToast = func.showSuccessToast;
+    this.showErrorToast = func.showErrorToast;
+    this.saveTransaction = func.saveTransaction;
+
+    this.evDataTrigger = EventDataTrigger.Instance;
   }
 
   subscribe() {
-    this.transform!.create('transactionView', this.updateData.bind(this));
+    this.evDataTrigger!.create('transactionView', this.updateData.bind(this));
   }
 
   sendData() {
@@ -91,7 +89,7 @@ export default class TransactionView {
       listTransactions: this.listTransactions!,
     };
 
-    this.transform!.onSendSignal('transactionView', data);
+    this.evDataTrigger!.onSendSignal('transactionView', data);
   }
 
   updateData(data: Data) {
@@ -174,7 +172,7 @@ export default class TransactionView {
 
           this.showSuccessToast!('Delete success!', DEFAULT_MESSAGE);
         } catch (error) {
-          this.showErrorToast!(error as string | TError);
+          this.showErrorToast!(error as TError);
         }
         this.toggleLoaderSpinner!();
       }
@@ -253,7 +251,7 @@ export default class TransactionView {
     deleteBtn.classList.toggle('hide', !showDeleteBtn());
   }
 
-  async submitTransactionDialog() {
+  async submitTransactionDialog(): Promise<void> {
     try {
       const dateEl = <HTMLDataElement>(
         this.transactionForm!.querySelector("[name='selected_date']")
@@ -308,12 +306,16 @@ export default class TransactionView {
         this.clearInputTransactionForm();
       }
     } catch (error) {
-      this.showErrorToast!(error as string | TError);
+      this.showErrorToast!(error as TError);
       this.toggleLoaderSpinner!();
     }
   }
 
-  validateTransactionForm(date: string, categoryName: string, amount: number) {
+  validateTransactionForm(
+    date: string,
+    categoryName: string,
+    amount: number,
+  ): boolean {
     const inputFieldEls =
       this.transactionDialog!.querySelectorAll('.form__input-field');
 
diff --git a/typescript-practice/src/ts/views/home/walletView.ts b/typescript-practice/src/ts/views/home/walletView.ts
index f5dd34e..d2ca12e 100644
--- a/typescript-practice/src/ts/views/home/walletView.ts
+++ b/typescript-practice/src/ts/views/home/walletView.ts
@@ -1,32 +1,39 @@
 import Transaction from '../../models/transaction';
 import Wallet from '../../models/wallet';
 import { renderRequiredText } from '../../helpers/validatorForm';
-import Transform from 'helpers/transform';
-import { Data, TError } from 'global/types';
+import EventDataTrigger from 'helpers/evDataTrigger';
+import {
+  Data,
+  IWalletViewFunc,
+  Nullable,
+  PromiseVoid,
+  TError,
+  VoidFunc,
+} from 'global/types';
 import User from 'models/user';
 import { FIRST_ADD_WALLET_NOTE } from 'constants/defaultVariable';
-import { ADD_WALLET_SUCCESS, DEFAULT_MESSAGE } from 'constants/messages/dialog';
+import { ADD_WALLET_SUCCESS, DEFAULT_MESSAGE } from 'constants/messages';
 
 export default class WalletView {
-  walletDialog: HTMLDialogElement | null = null;
+  walletDialog: Nullable<HTMLDialogElement> = null;
 
-  transform: Transform | null = null;
+  evDataTrigger: Nullable<EventDataTrigger> = null;
 
-  toggleLoaderSpinner: (() => void) | null = null;
+  toggleLoaderSpinner: Nullable<VoidFunc> = null;
 
-  saveWallet: ((wallet: Wallet) => Promise<void>) | null = null;
+  saveWallet: Nullable<(wallet: Wallet) => Promise<void>> = null;
 
-  saveTransaction: ((transaction: Transaction) => Promise<void>) | null = null;
+  saveTransaction: Nullable<(transaction: Transaction) => Promise<void>> = null;
 
-  loadTransactionData: (() => Promise<void>) | null = null;
+  loadTransactionData: Nullable<PromiseVoid> = null;
 
-  loadData: (() => Promise<void>) | null = null;
+  loadData: Nullable<PromiseVoid> = null;
 
-  loadEvent: (() => void) | null = null;
+  loadEvent: Nullable<VoidFunc> = null;
 
   showSuccessToast: ((title: string, message: string) => void) | null = null;
 
-  showErrorToast: ((error: string | TError) => void) | null = null;
+  showErrorToast: ((error: TError) => void) | null = null;
 
   user: User | null = null;
 
@@ -40,30 +47,21 @@ export default class WalletView {
     this.addHandlerEventWalletForm();
   }
 
-  initFunction(
-    transform: Transform | null,
-    toggleLoaderSpinner: () => void,
-    saveWallet: ((wallet: Wallet) => Promise<void>) | null,
-    saveTransaction: ((transaction: Transaction) => Promise<void>) | null,
-    loadTransactionData: () => Promise<void>,
-    loadData: () => Promise<void>,
-    loadEvent: () => void,
-    showSuccessToast: (title: string, message: string) => void,
-    showErrorToast: (error: string | TError) => void,
-  ) {
-    this.transform = transform;
-    this.toggleLoaderSpinner = toggleLoaderSpinner;
-    this.saveWallet = saveWallet;
-    this.saveTransaction = saveTransaction;
-    this.loadTransactionData = loadTransactionData;
-    this.loadData = loadData;
-    this.loadEvent = loadEvent;
-    this.showSuccessToast = showSuccessToast;
-    this.showErrorToast = showErrorToast;
+  initFunction(func: IWalletViewFunc) {
+    this.toggleLoaderSpinner = func.toggleLoaderSpinner;
+    this.saveWallet = func.saveWallet;
+    this.saveTransaction = func.saveTransaction;
+    this.loadTransactionData = func.loadTransactionData;
+    this.loadData = func.loadData;
+    this.loadEvent = func.loadEvent;
+    this.showSuccessToast = func.showSuccessToast;
+    this.showErrorToast = func.showErrorToast;
+
+    this.evDataTrigger = EventDataTrigger.Instance;
   }
 
   subscribe() {
-    this.transform!.create('walletView', this.updateData.bind(this));
+    this.evDataTrigger!.create('walletView', this.updateData.bind(this));
   }
 
   sendData() {
@@ -72,7 +70,7 @@ export default class WalletView {
       user: this.user!,
     };
 
-    this.transform!.onSendSignal('walletView', data);
+    this.evDataTrigger!.onSendSignal('walletView', data);
   }
 
   updateData(data: Data) {
@@ -116,7 +114,7 @@ export default class WalletView {
     });
   }
 
-  async submitWalletForm() {
+  async submitWalletForm(): Promise<void> {
     try {
       // Wallet info
       const form = document.getElementById('walletForm') as HTMLFormElement;
@@ -128,7 +126,7 @@ export default class WalletView {
         this.walletDialog!.close();
         this.toggleLoaderSpinner!();
 
-        const wallet = new Wallet(walletName, +amount, 0, this.user!.id);
+        const wallet = new Wallet('', walletName, +amount, 0, this.user!.id);
         this.wallet = wallet;
 
         this.sendData();
@@ -156,12 +154,12 @@ export default class WalletView {
       }
     } catch (error) {
       // Show toast error
-      this.showErrorToast!(error as string | TError);
+      this.showErrorToast!(error as TError);
       this.toggleLoaderSpinner!();
     }
   }
 
-  validateWalletDialog(walletName: string, amount: number) {
+  validateWalletDialog(walletName: string, amount: number): boolean {
     const inputFieldEls =
       this.walletDialog!.querySelectorAll('.form__input-field');
 
diff --git a/typescript-practice/src/ts/views/index.ts b/typescript-practice/src/ts/views/index.ts
index 8af6861..af1b6a4 100644
--- a/typescript-practice/src/ts/views/index.ts
+++ b/typescript-practice/src/ts/views/index.ts
@@ -3,13 +3,14 @@ import LoginView from './loginView';
 import RegisterView from './registerView';
 import { URL } from 'constants/config';
 import HomeView from './home/homeView';
+import { Nullable } from 'global/types';
 
 export default class View {
-  public registerView: RegisterView | null = null;
+  public registerView: Nullable<RegisterView> = null;
 
-  public loginView: LoginView | null = null;
+  public loginView: Nullable<LoginView> = null;
 
-  public homeView: HomeView | null = null;
+  public homeView: Nullable<HomeView> = null;
 
   constructor() {
     switch (getSubdirectoryURL()) {
diff --git a/typescript-practice/src/ts/views/loginView.ts b/typescript-practice/src/ts/views/loginView.ts
index e05a001..984bcb7 100644
--- a/typescript-practice/src/ts/views/loginView.ts
+++ b/typescript-practice/src/ts/views/loginView.ts
@@ -1,10 +1,12 @@
 import AuthenticationView from './authenticationView';
 import { TypeToast, BTN_CONTENT } from '../constants/config';
 import User from 'models/user';
-import { DEFAULT_TITLE_ERROR_TOAST } from 'constants/messages/dialog';
-import { CustomError, TError } from 'global/types';
+import {
+  DEFAULT_TITLE_ERROR_TOAST,
+  ERROR_CREDENTIAL,
+} from 'constants/messages';
+import { CustomError, Nullable, PromiseOrNull, TError } from 'global/types';
 import { redirectToLoginPage } from 'helpers/url';
-import { ERROR_CREDENTIAL } from 'constants/messages/form';
 
 export default class LoginView extends AuthenticationView {
   constructor() {
@@ -15,7 +17,7 @@ export default class LoginView extends AuthenticationView {
     this.handleEventToast();
   }
 
-  async loadPage(getInfoUserLogin: () => Promise<User | null>) {
+  async loadPage(getInfoUserLogin: PromiseOrNull<User>) {
     this.toggleLoaderSpinner();
     const user = await getInfoUserLogin();
     if (user) {
@@ -28,7 +30,7 @@ export default class LoginView extends AuthenticationView {
    * Implement error toast in site
    * @param {string} content The content will show in error toast
    */
-  initErrorToast(error: TError | string): void {
+  initErrorToast(error: TError) {
     const title =
       typeof error === 'object' && error.title
         ? error.title
@@ -90,7 +92,7 @@ export default class LoginView extends AuthenticationView {
       }
     } catch (error) {
       // Show toast error
-      this.initErrorToast(error as string | TError);
+      this.initErrorToast(error as TError);
     }
     // Close spinner
     this.toggleLoaderSpinner();
@@ -100,7 +102,7 @@ export default class LoginView extends AuthenticationView {
    * Get data from user input
    * @returns {Object || null} Return object or null
    */
-  validateForm(event: Event): User | null {
+  validateForm(event: Event): Nullable<User> {
     if (event.target) {
       const formData = new FormData(event.target as HTMLFormElement);
       const email = formData.get('email') as string;
@@ -116,7 +118,7 @@ export default class LoginView extends AuthenticationView {
         this.emailEl.classList.toggle('error-input', !emailValid);
         this.inputPasswordEl.classList.toggle('error-input', !passwordValid);
         if (emailValid && passwordValid) {
-          return new User(email, password);
+          return new User('', email, password);
         }
       }
     }
diff --git a/typescript-practice/src/ts/views/registerView.ts b/typescript-practice/src/ts/views/registerView.ts
index f60d587..055d522 100644
--- a/typescript-practice/src/ts/views/registerView.ts
+++ b/typescript-practice/src/ts/views/registerView.ts
@@ -7,8 +7,14 @@ import {
   DEFAULT_TITLE_ERROR_TOAST,
   REGISTER_SUCCESS,
   USER_EXIST_ERROR,
-} from 'constants/messages/dialog';
-import { TError } from 'global/types';
+} from 'constants/messages';
+import { Nullable, PromiseOrNull, TError } from 'global/types';
+
+interface UserInput {
+  email: string;
+  password: string;
+  passwordConfirm: string;
+}
 
 export default class RegisterView extends AuthenticationView {
   constructor() {
@@ -21,7 +27,7 @@ export default class RegisterView extends AuthenticationView {
     this.toastBtn = document.querySelector('.toast__redirect-btn');
   }
 
-  async loadPage(getInfoUserLogin: () => Promise<User | null>) {
+  async loadPage(getInfoUserLogin: PromiseOrNull<User>) {
     this.toggleLoaderSpinner();
 
     const user = await getInfoUserLogin();
@@ -37,20 +43,36 @@ export default class RegisterView extends AuthenticationView {
    * Get data from user input
    * @returns {Object || null} Return object or null
    */
-  validateForm(): User | null {
+  getUserFromForm(): Nullable<User> {
     const form = document.getElementById('registerForm') as HTMLFormElement;
     const formData = new FormData(form);
     const email = formData.get('email') as string;
     const password = formData.get('password') as string;
     const passwordConfirm = formData.get('password_confirm') as string;
 
-    // Validate user input
-    this.listError = []; // Reset list error
-    const emailValid = this.validateEmail(email);
-    const passwordValid = this.validatePassword(password);
-    const passwordConfirmValid = this.validatePasswordConfirm(
+    const userInput: UserInput = {
+      email,
       password,
       passwordConfirm,
+    };
+
+    const result = this.validateForm(userInput);
+
+    if (result) {
+      return new User('', email, password);
+    }
+
+    return null;
+  }
+
+  validateForm(userInput: UserInput): boolean {
+    // Validate user input
+    this.listError = []; // Reset list error
+    const emailValid = this.validateEmail(userInput.email);
+    const passwordValid = this.validatePassword(userInput.password);
+    const passwordConfirmValid = this.validatePasswordConfirm(
+      userInput.password,
+      userInput.passwordConfirm,
     );
 
     // Show error style
@@ -63,13 +85,9 @@ export default class RegisterView extends AuthenticationView {
       );
     }
 
-    if (emailValid && passwordValid && passwordConfirmValid) {
-      return new User(email, password);
-    }
-
     this.showError(this.listError);
 
-    return null;
+    return emailValid && passwordValid && passwordConfirmValid;
   }
 
   /**
@@ -95,7 +113,7 @@ export default class RegisterView extends AuthenticationView {
    * Implement error toast in site
    * @param {string} content The content will show in error toast
    */
-  initErrorToast(error: TError | string): void {
+  initErrorToast(error: TError) {
     const title =
       typeof error === 'object' && error.title
         ? error.title
@@ -126,10 +144,10 @@ export default class RegisterView extends AuthenticationView {
     saveUser: (user: User) => Promise<void>,
   ) {
     if (this.formEl) {
-      this.formEl.addEventListener('submit', (e) => {
+      this.formEl.addEventListener('submit', async (e) => {
         e.preventDefault();
         this.clearErrorMessage();
-        this.submitForm(checkExistUser, saveUser);
+        await this.submitForm(checkExistUser, saveUser);
       });
     }
   }
@@ -137,13 +155,13 @@ export default class RegisterView extends AuthenticationView {
   async submitForm(
     checkExistUser: (email: string) => Promise<boolean>,
     saveUser: (user: User) => Promise<void>,
-  ) {
+  ): Promise<void> {
     try {
       // Load spinner
       this.toggleLoaderSpinner();
 
       // Get validate form
-      const user = this.validateForm();
+      const user = this.getUserFromForm();
 
       // Save user
       if (user) {
@@ -166,7 +184,7 @@ export default class RegisterView extends AuthenticationView {
       }
     } catch (error) {
       // Show toast error
-      this.initErrorToast(error as string | TError);
+      this.initErrorToast(error as TError);
     }
 
     // Close spinner