diff --git a/.env b/.env
index 2accbba818..dae6759dc5 100644
--- a/.env
+++ b/.env
@@ -1 +1,2 @@
 ESLINT_NO_DEV_ERRORS=true
+BROWSER=chrome
diff --git a/README.md b/README.md
index 47a1add059..224beb9bce 100644
--- a/README.md
+++ b/README.md
@@ -47,4 +47,4 @@ Implement the ability to edit a todo title on double click:
 
 - Implement a solution following the [React task guideline](https://github.com/mate-academy/react_task-guideline#react-tasks-guideline).
 - Use the [React TypeScript cheat sheet](https://mate-academy.github.io/fe-program/js/extra/react-typescript).
-- Replace `<your_account>` with your Github username in the [DEMO LINK](https://<your_account>.github.io/react_todo-app-with-api/) and add it to the PR description.
+- Replace `<your_account>` with your Github username in the [DEMO LINK](https://Visol.github.io/react_todo-app-with-api/) and add it to the PR description.
diff --git a/src/App.tsx b/src/App.tsx
index 81e011f432..ce37ee868d 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -1,26 +1,237 @@
 /* eslint-disable max-len */
 /* eslint-disable jsx-a11y/control-has-associated-label */
-import React from 'react';
+import React, { FormEvent, useEffect, useState } from 'react';
 import { UserWarning } from './UserWarning';
-
-const USER_ID = 0;
+import { createTodo, deleteTodo, getTodos, USER_ID } from './api/todos';
+import { ErrorMessage, Status, Todo } from './types/Todo';
+import classNames from 'classnames';
+import { getActiveTodos, getFilteredTodos } from './utils/helper';
+import { TodoItem } from './components';
 
 export const App: React.FC = () => {
+  const [todos, setTodos] = useState<Todo[]>([]);
+  const [errorMessage, setErrorMessage] = useState('');
+  const [statusFilter, setStatusFilter] = useState(Status.all);
+  const [newTitle, setNewTitle] = useState('');
+  const [tempTodo, setTempTodo] = useState<Todo | null>(null);
+  const [waitingDeleteTodos, setWaitingDeleteTodos] = useState<number[]>([]);
+  const [keyToForm, setKeyToForm] = useState(0);
+  const [formDisabled, setFormDisabled] = useState(false);
+
+  useEffect(() => {
+    getTodos()
+      .then(setTodos)
+      .catch(() => setErrorMessage(ErrorMessage.Load))
+      .finally();
+  }, []);
+
+  useEffect(() => {
+    if (!errorMessage) {
+      return;
+    }
+
+    const timerId = setTimeout(() => {
+      setErrorMessage('');
+    }, 3000);
+
+    return () => clearTimeout(timerId);
+  }, [errorMessage]);
+
   if (!USER_ID) {
     return <UserWarning />;
   }
 
+  const handleDeleteTodo = (id: number) => {
+    setWaitingDeleteTodos(current => [...current, id]);
+    deleteTodo(id)
+      .then(() => {
+        setTodos(current => current.filter(todo => todo.id !== id));
+      })
+      .catch(() => {
+        setErrorMessage(ErrorMessage.Delete);
+      })
+      .finally(() => {
+        setWaitingDeleteTodos(current => current.filter(item => item !== id));
+        setKeyToForm(current => current + 1);
+      });
+  };
+
+  const handleSubmit = (event: FormEvent<HTMLFormElement>) => {
+    event.preventDefault();
+    const normalizedTitle = newTitle.trim();
+
+    if (!normalizedTitle) {
+      setErrorMessage(ErrorMessage.TitleEmpty);
+
+      return;
+    }
+
+    setTempTodo({
+      id: 0,
+      title: normalizedTitle,
+      completed: false,
+      userId: USER_ID,
+    });
+
+    setFormDisabled(true);
+
+    createTodo(normalizedTitle)
+      .then(todo => {
+        setTodos(current => [...current, todo]);
+        setNewTitle('');
+      })
+      .catch(() => setErrorMessage(ErrorMessage.Add))
+      .finally(() => {
+        setTempTodo(null);
+        setKeyToForm(current => current + 1);
+        setFormDisabled(false);
+      });
+  };
+
+  const handleBundleDelete = () => {
+    for (const todo of todos) {
+      if (todo.completed) {
+        handleDeleteTodo(todo.id);
+      }
+    }
+  };
+
+  // const showTodosAndFooter = todos.length > 0;
+  const showToggleAllButton = todos.length > 0;
+  const activeTodos = getActiveTodos(todos);
+  const filteredTodos = getFilteredTodos(todos, statusFilter);
+  const isAllCompleted = todos.length > 0 && activeTodos.length === 0;
+  const completedTodos = todos.length - activeTodos.length;
+
   return (
-    <section className="section container">
-      <p className="title is-4">
-        Copy all you need from the prev task:
-        <br />
-        <a href="https://github.com/mate-academy/react_todo-app-add-and-delete#react-todo-app-add-and-delete">
-          React Todo App - Add and Delete
-        </a>
-      </p>
+    <div className="todoapp">
+      <h1 className="todoapp__title">todos</h1>
+
+      <div className="todoapp__content">
+        <header className="todoapp__header">
+          {/* this button should have `active` class only if all todos are completed */}
+          <button
+            type="button"
+            className={classNames('todoapp__toggle-all', {
+              active: isAllCompleted,
+            })}
+            data-cy="ToggleAllButton"
+          />
+
+          {/* Add a todo on form submit */}
+          <form onSubmit={handleSubmit} key={keyToForm}>
+            <input
+              data-cy="NewTodoField"
+              type="text"
+              className="todoapp__new-todo"
+              placeholder="What needs to be done?"
+              value={newTitle}
+              onChange={event => setNewTitle(event.target.value)}
+              autoFocus
+              disabled={formDisabled}
+            />
+          </form>
+        </header>
+
+        <section className="todoapp__main" data-cy="TodoList">
+          {filteredTodos.map(todo => (
+            <TodoItem
+              key={todo.id}
+              todo={todo}
+              onDelete={handleDeleteTodo}
+              loader={waitingDeleteTodos.includes(todo.id)}
+            />
+          ))}
+
+          {tempTodo && (
+            <TodoItem todo={tempTodo} loader={true} onDelete={() => {}} />
+          )}
+        </section>
+
+        {/* Hide the footer if there are no todos */}
+        {showToggleAllButton && (
+          <footer className="todoapp__footer" data-cy="Footer">
+            <span className="todo-count" data-cy="TodosCounter">
+              {activeTodos.length} items left
+            </span>
+
+            {/* Active link should have the 'selected' class */}
+            <nav className="filter" data-cy="Filter">
+              <a
+                href="#/"
+                className={classNames('filter__link', {
+                  selected: statusFilter === Status.all,
+                })}
+                data-cy="FilterLinkAll"
+                onClick={() => setStatusFilter(Status.all)}
+              >
+                All
+              </a>
 
-      <p className="subtitle">Styles are already copied</p>
-    </section>
+              <a
+                href="#/active"
+                className={classNames('filter__link', {
+                  selected: statusFilter === Status.active,
+                })}
+                data-cy="FilterLinkActive"
+                onClick={() => setStatusFilter(Status.active)}
+              >
+                Active
+              </a>
+
+              <a
+                href="#/completed"
+                className={classNames('filter__link', {
+                  selected: statusFilter === Status.completed,
+                })}
+                data-cy="FilterLinkCompleted"
+                onClick={() => setStatusFilter(Status.completed)}
+              >
+                Completed
+              </a>
+            </nav>
+
+            {/* this button should be disabled if there are no completed todos */}
+            <button
+              type="button"
+              className="todoapp__clear-completed"
+              data-cy="ClearCompletedButton"
+              onClick={handleBundleDelete}
+              disabled={completedTodos < 1}
+            >
+              Clear completed
+            </button>
+          </footer>
+        )}
+      </div>
+
+      {/* DON'T use conditional rendering to hide the notification */}
+      {/* Add the 'hidden' class to hide the message smoothly */}
+      <div
+        data-cy="ErrorNotification"
+        className={classNames(
+          'notification is-danger is-light has-text-weight-normal',
+          { hidden: !errorMessage },
+        )}
+      >
+        <button
+          data-cy="HideErrorButton"
+          type="button"
+          className="delete"
+          onClick={() => setErrorMessage('')}
+        />
+        {/* show only one message at a time */}
+        {errorMessage}
+        {/* Unable to load todos
+        <br />
+        Title should not be empty
+        <br />
+        Unable to add a todo
+        <br />
+        Unable to delete a todo
+        <br />
+        Unable to update a todo */}
+      </div>
+    </div>
   );
 };
diff --git a/src/api/todos.ts b/src/api/todos.ts
new file mode 100644
index 0000000000..ae59876604
--- /dev/null
+++ b/src/api/todos.ts
@@ -0,0 +1,22 @@
+import { Todo } from '../types/Todo';
+import { client } from '../utils/fetchClient';
+
+export const USER_ID = 4234;
+
+export const getTodos = () => {
+  return client.get<Todo[]>(`/todos?userId=${USER_ID}`);
+};
+
+export const createTodo = (title: string) => {
+  const data: Omit<Todo, 'id'> = {
+    userId: Number(USER_ID),
+    title,
+    completed: false,
+  };
+
+  return client.post<Todo>(`/todos`, data);
+};
+
+export const deleteTodo = (id: number) => {
+  return client.delete(`/todos/${id}`);
+};
diff --git a/src/components/index.ts b/src/components/index.ts
new file mode 100644
index 0000000000..278ccf2633
--- /dev/null
+++ b/src/components/index.ts
@@ -0,0 +1 @@
+export * from './todoItem';
diff --git a/src/components/todoItem.tsx b/src/components/todoItem.tsx
new file mode 100644
index 0000000000..0f7630b211
--- /dev/null
+++ b/src/components/todoItem.tsx
@@ -0,0 +1,59 @@
+import classNames from 'classnames';
+import { Todo } from '../types/Todo';
+
+type TodoItemProps = {
+  todo: Todo;
+  loader?: boolean;
+  onDelete: (id: number) => void;
+};
+
+export function TodoItem({ todo, loader = false, onDelete }: TodoItemProps) {
+  const todoId = `todo-status-${todo.id}`;
+
+  return (
+    <div
+      key={todo.id}
+      data-cy="Todo"
+      className={classNames('todo is-active', {
+        'todo completed': todo.completed,
+      })}
+    >
+      <label className="todo__status-label" htmlFor={todoId}>
+        <input
+          id={todoId}
+          aria-label="Toggle todo completion"
+          data-cy="TodoStatus"
+          type="checkbox"
+          className="todo__status"
+          checked={todo.completed}
+          onChange={() => {}}
+        />
+      </label>
+
+      <span data-cy="TodoTitle" className="todo__title">
+        {todo.title}
+      </span>
+
+      {/* Remove button appears only on hover */}
+      <button
+        type="button"
+        className="todo__remove"
+        data-cy="TodoDelete"
+        onClick={() => onDelete(todo.id)}
+      >
+        ×
+      </button>
+
+      {/* overlay will cover the todo while it is being deleted or updated */}
+      <div
+        data-cy="TodoLoader"
+        className={classNames('modal overlay', {
+          'is-active': loader,
+        })}
+      >
+        <div className="modal-background has-background-white-ter" />
+        <div className="loader" />
+      </div>
+    </div>
+  );
+}
diff --git a/src/types/Todo.ts b/src/types/Todo.ts
new file mode 100644
index 0000000000..9e94a04cef
--- /dev/null
+++ b/src/types/Todo.ts
@@ -0,0 +1,20 @@
+export interface Todo {
+  id: number;
+  userId: number;
+  title: string;
+  completed: boolean;
+}
+
+export enum Status {
+  all = 'all',
+  completed = 'completed',
+  active = 'active',
+}
+
+export enum ErrorMessage {
+  Load = 'Unable to load todos',
+  Add = 'Unable to add a todo',
+  Delete = 'Unable to delete a todo',
+  Update = 'Unable to update a todo',
+  TitleEmpty = 'Title should not be empty',
+}
diff --git a/src/utils/fetchClient.ts b/src/utils/fetchClient.ts
new file mode 100644
index 0000000000..708ac4c17b
--- /dev/null
+++ b/src/utils/fetchClient.ts
@@ -0,0 +1,46 @@
+/* eslint-disable @typescript-eslint/no-explicit-any */
+const BASE_URL = 'https://mate.academy/students-api';
+
+// returns a promise resolved after a given delay
+function wait(delay: number) {
+  return new Promise(resolve => {
+    setTimeout(resolve, delay);
+  });
+}
+
+// To have autocompletion and avoid mistypes
+type RequestMethod = 'GET' | 'POST' | 'PATCH' | 'DELETE';
+
+function request<T>(
+  url: string,
+  method: RequestMethod = 'GET',
+  data: any = null, // we can send any data to the server
+): Promise<T> {
+  const options: RequestInit = { method };
+
+  if (data) {
+    // We add body and Content-Type only for the requests with data
+    options.body = JSON.stringify(data);
+    options.headers = {
+      'Content-Type': 'application/json; charset=UTF-8',
+    };
+  }
+
+  // DON'T change the delay it is required for tests
+  return wait(100)
+    .then(() => fetch(BASE_URL + url, options))
+    .then(response => {
+      if (!response.ok) {
+        throw new Error();
+      }
+
+      return response.json();
+    });
+}
+
+export const client = {
+  get: <T>(url: string) => request<T>(url),
+  post: <T>(url: string, data: any) => request<T>(url, 'POST', data),
+  patch: <T>(url: string, data: any) => request<T>(url, 'PATCH', data),
+  delete: (url: string) => request(url, 'DELETE'),
+};
diff --git a/src/utils/helper.ts b/src/utils/helper.ts
new file mode 100644
index 0000000000..f5966fedd5
--- /dev/null
+++ b/src/utils/helper.ts
@@ -0,0 +1,18 @@
+import { Status, Todo } from '../types/Todo';
+
+export function getFilteredTodos(allTodos: Todo[], statusFilter: Status) {
+  return allTodos.filter(todo => {
+    switch (statusFilter) {
+      case Status.active:
+        return !todo.completed;
+      case Status.completed:
+        return todo.completed;
+      default:
+        return true;
+    }
+  });
+}
+
+export function getActiveTodos(allTodos: Todo[]) {
+  return allTodos.filter(todo => !todo.completed);
+}