diff --git a/README.md b/README.md
index 47a1add059..538c3774bf 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://SemenVodolazskij.github.io/react_todo-app-with-api/) and add it to the PR description.
diff --git a/package-lock.json b/package-lock.json
index 19701e8788..511279ae76 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -19,7 +19,7 @@
       },
       "devDependencies": {
         "@cypress/react18": "^2.0.1",
-        "@mate-academy/scripts": "^1.8.5",
+        "@mate-academy/scripts": "^1.9.12",
         "@mate-academy/students-ts-config": "*",
         "@mate-academy/stylelint-config": "*",
         "@types/node": "^20.14.10",
@@ -1183,10 +1183,11 @@
       }
     },
     "node_modules/@mate-academy/scripts": {
-      "version": "1.8.5",
-      "resolved": "https://registry.npmjs.org/@mate-academy/scripts/-/scripts-1.8.5.tgz",
-      "integrity": "sha512-mHRY2FkuoYCf5U0ahIukkaRo5LSZsxrTSgMJheFoyf3VXsTvfM9OfWcZIDIDB521kdPrScHHnRp+JRNjCfUO5A==",
+      "version": "1.9.12",
+      "resolved": "https://registry.npmjs.org/@mate-academy/scripts/-/scripts-1.9.12.tgz",
+      "integrity": "sha512-/OcmxMa34lYLFlGx7Ig926W1U1qjrnXbjFJ2TzUcDaLmED+A5se652NcWwGOidXRuMAOYLPU2jNYBEkKyXrFJA==",
       "dev": true,
+      "license": "MIT",
       "dependencies": {
         "@octokit/rest": "^17.11.2",
         "@types/get-port": "^4.2.0",
diff --git a/package.json b/package.json
index b6062525ab..005692edf7 100644
--- a/package.json
+++ b/package.json
@@ -15,7 +15,7 @@
   },
   "devDependencies": {
     "@cypress/react18": "^2.0.1",
-    "@mate-academy/scripts": "^1.8.5",
+    "@mate-academy/scripts": "^1.9.12",
     "@mate-academy/students-ts-config": "*",
     "@mate-academy/stylelint-config": "*",
     "@types/node": "^20.14.10",
diff --git a/src/App.tsx b/src/App.tsx
index 81e011f432..46aa14689d 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -1,26 +1,293 @@
-/* eslint-disable max-len */
-/* eslint-disable jsx-a11y/control-has-associated-label */
-import React from 'react';
+import React, { useEffect, useRef, useState } from 'react';
 import { UserWarning } from './UserWarning';
+import {
+  addTodos,
+  deleteTodos,
+  getTodos,
+  updateTodos as updateTodo,
+  USER_ID,
+} from './api/todos';
+import { Todo } from './types/Todo';
+import classNames from 'classnames';
 
-const USER_ID = 0;
+import { Filter } from './types/FilterButton';
+import { Error } from './types/ErrorMessage';
+import { CompletedTodo } from './components/CompletedTodo';
 
 export const App: React.FC = () => {
+  const [todos, setTodos] = useState<Todo[]>([]);
+  const [error, setError] = useState<Error>(Error.Reset);
+  const [filter, setFilter] = useState<Filter>(Filter.All);
+  const [inputValue, setInputValue] = useState('');
+  const [tempTodo, setTempTodo] = useState<Todo | null>(null);
+  const inputRef = useRef<HTMLInputElement>(null);
+  const [loadingTodoIds, setLoadingTodoIds] = useState<number[]>([]);
+  const [isToogleAll, setIsToogleAll] = useState(false);
+  const [editingTodoId, setEditingTodoId] = useState<number | null>(null);
+
+  const handleTodoDoubleClick = (id: number | null) => {
+    setEditingTodoId(id);
+  };
+
+  const onDeleteTodo = async (todoId: number) => {
+    setLoadingTodoIds(prev => [...prev, todoId]);
+    try {
+      await deleteTodos(todoId);
+
+      setTodos(item => item.filter(todo => todo.id !== todoId));
+    } catch (err) {
+      setError(Error.Delete);
+      throw err;
+    } finally {
+      setLoadingTodoIds(prev => prev.filter(id => id !== todoId));
+    }
+  };
+
+  const onAddTodo = async (todoTitle: string) => {
+    setTempTodo({ id: 0, title: todoTitle, completed: false, userId: USER_ID });
+    try {
+      const newTodo = await addTodos({ title: todoTitle, completed: false });
+
+      setTodos(item => [...item, newTodo]);
+    } catch (err) {
+      setError(Error.Add);
+      throw err;
+    } finally {
+      setTempTodo(null);
+    }
+  };
+
+  const onClearCompleted = async () => {
+    const completedTodos = todos.filter(todo => todo.completed);
+
+    completedTodos.forEach(todo => {
+      onDeleteTodo(todo.id);
+    });
+  };
+
+  const onUpdateTodo = async (todoUpdate: Todo) => {
+    const oldTodos = [...todos];
+
+    setLoadingTodoIds(prev => [...prev, todoUpdate.id]);
+
+    try {
+      await updateTodo(todoUpdate);
+      setTodos(currentTodos =>
+        currentTodos.map(todo => {
+          return todo.id === todoUpdate.id ? todoUpdate : todo;
+        }),
+      );
+    } catch (err) {
+      setTodos(oldTodos);
+      setError(Error.Update);
+      throw err;
+    } finally {
+      setLoadingTodoIds(prev => prev.filter(id => id !== todoUpdate.id));
+    }
+  };
+
+  const handleSubmit = async (event: React.FormEvent<HTMLFormElement>) => {
+    event.preventDefault();
+    if (inputValue.trim() === '') {
+      setError(Error.Empty);
+
+      return;
+    }
+
+    try {
+      await onAddTodo(inputValue.trim());
+      setInputValue('');
+    } catch (err) {}
+  };
+
+  const inputFocus = () => {
+    if (inputRef.current) {
+      inputRef.current.focus();
+    }
+  };
+
+  useEffect(() => {
+    if (todos && !editingTodoId) {
+      inputFocus();
+    }
+  }, [error, todos, editingTodoId]);
+
+  useEffect(() => {
+    const timer = setTimeout(() => setError(Error.Reset), 3000);
+
+    return () => clearTimeout(timer);
+  }, [error]);
+
+  useEffect(() => {
+    getTodos()
+      .then(setTodos)
+      .catch(() => setError(Error.Load));
+  }, []);
+
+  const filteredTodos = todos.filter(todo => {
+    if (filter === Filter.Active) {
+      return !todo.completed;
+    }
+
+    if (filter === Filter.Completed) {
+      return todo.completed;
+    }
+
+    return Filter.All;
+  });
+
   if (!USER_ID) {
     return <UserWarning />;
   }
 
+  const unCompletedTodosCounter = todos.filter(todo => !todo.completed).length;
+  const todosCompletedNum = todos.filter(todo => todo.completed).length;
+  const allTodosCompleted =
+    todos.length > 0 && todos.every(todo => todo.completed);
+
+  const onToggleAll = () => {
+    if (unCompletedTodosCounter > 0) {
+      const activeTodos = todos.filter(todo => !todo.completed);
+
+      activeTodos.forEach(todo => {
+        onUpdateTodo({ ...todo, completed: true });
+      });
+      setIsToogleAll(true);
+    } else {
+      todos.forEach(todo => {
+        onUpdateTodo({ ...todo, completed: false });
+      });
+      setIsToogleAll(false);
+    }
+  };
+
   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>
-
-      <p className="subtitle">Styles are already copied</p>
-    </section>
+    <div className="todoapp">
+      <h1 className="todoapp__title">todos</h1>
+
+      <div className="todoapp__content">
+        <header className="todoapp__header">
+          {todos.length > 0 && (
+            <button
+              type="button"
+              className={classNames('todoapp__toggle-all', {
+                active: isToogleAll || allTodosCompleted,
+              })}
+              data-cy="ToggleAllButton"
+              onClick={onToggleAll}
+            />
+          )}
+
+          <form onSubmit={handleSubmit}>
+            <input
+              value={inputValue}
+              onChange={event => setInputValue(event.target.value)}
+              data-cy="NewTodoField"
+              type="text"
+              className="todoapp__new-todo"
+              placeholder="What needs to be done?"
+              ref={inputRef}
+              disabled={!!tempTodo}
+            />
+          </form>
+        </header>
+
+        <section className="todoapp__main" data-cy="TodoList">
+          {filteredTodos.map(todo => (
+            <CompletedTodo
+              error={error}
+              editingTodoId={editingTodoId}
+              handleTodoDoubleClick={handleTodoDoubleClick}
+              key={todo.id}
+              todo={todo}
+              onDelete={onDeleteTodo}
+              onUpdateTodo={onUpdateTodo}
+              isLoading={loadingTodoIds.includes(todo.id)}
+              setEditingTodoId={setEditingTodoId}
+            />
+          ))}
+          {tempTodo && (
+            <CompletedTodo
+              error={error}
+              setEditingTodoId={setEditingTodoId}
+              editingTodoId={editingTodoId}
+              handleTodoDoubleClick={handleTodoDoubleClick}
+              todo={tempTodo}
+              isLoading
+              onDelete={onDeleteTodo}
+              onUpdateTodo={onUpdateTodo}
+            />
+          )}
+        </section>
+
+        {todos.length > 0 && (
+          <footer className="todoapp__footer" data-cy="Footer">
+            <span className="todo-count" data-cy="TodosCounter">
+              {unCompletedTodosCounter} items left
+            </span>
+            <nav className="filter" data-cy="Filter">
+              <button
+                className={classNames('filter__link', {
+                  selected: filter === 'all',
+                })}
+                data-cy="FilterLinkAll"
+                onClick={() => setFilter(Filter.All)}
+              >
+                All
+              </button>
+
+              <button
+                className={classNames('filter__link', {
+                  selected: filter === 'active',
+                })}
+                data-cy="FilterLinkActive"
+                onClick={() => setFilter(Filter.Active)}
+              >
+                Active
+              </button>
+
+              <button
+                className={classNames('filter__link', {
+                  selected: filter === 'completed',
+                })}
+                data-cy="FilterLinkCompleted"
+                onClick={() => setFilter(Filter.Completed)}
+              >
+                Completed
+              </button>
+            </nav>
+
+            <button
+              type="button"
+              className="todoapp__clear-completed"
+              data-cy="ClearCompletedButton"
+              onClick={onClearCompleted}
+              disabled={todosCompletedNum === 0}
+            >
+              Clear completed
+            </button>
+          </footer>
+        )}
+      </div>
+
+      <div
+        data-cy="ErrorNotification"
+        className={classNames(
+          'notification',
+          'is-danger',
+          'is-light',
+          'has-text-weight-normal',
+          { hidden: !error },
+        )}
+      >
+        <button
+          data-cy="HideErrorButton"
+          type="button"
+          className="delete"
+          onClick={() => setError(Error.Reset)}
+        />
+        {error}
+      </div>
+    </div>
   );
 };
diff --git a/src/api/todos.ts b/src/api/todos.ts
new file mode 100644
index 0000000000..93978be6f0
--- /dev/null
+++ b/src/api/todos.ts
@@ -0,0 +1,20 @@
+import { Todo } from '../types/Todo';
+import { client } from '../utils/fetchClient';
+
+export const USER_ID = 2171;
+
+export const getTodos = () => {
+  return client.get<Todo[]>(`/todos?userId=${USER_ID}`);
+};
+
+export const addTodos = (newTodo: Omit<Todo, 'id' | 'userId'>) => {
+  return client.post<Todo>(`/todos`, { ...newTodo, userId: USER_ID });
+};
+
+export const deleteTodos = (todoId: number) => {
+  return client.delete(`/todos/${todoId}`);
+};
+
+export const updateTodos = (todo: Todo) => {
+  return client.patch<Todo>(`/todos/${todo.id}`, todo);
+};
diff --git a/src/components/CompletedTodo.tsx b/src/components/CompletedTodo.tsx
new file mode 100644
index 0000000000..4eef9a4944
--- /dev/null
+++ b/src/components/CompletedTodo.tsx
@@ -0,0 +1,155 @@
+/* eslint-disable jsx-a11y/label-has-associated-control */
+import React, { useEffect, useRef, useState } from 'react';
+import { Todo } from '../types/Todo';
+import classNames from 'classnames';
+import { Error } from '../types/ErrorMessage';
+
+type Props = {
+  todo: Todo;
+  isLoading?: boolean;
+  onDelete: (todoId: number) => Promise<void>;
+  onUpdateTodo: (todoUpdate: Todo) => Promise<void>;
+  handleTodoDoubleClick: (id: number | null) => void;
+  editingTodoId: number | null;
+  setEditingTodoId: React.Dispatch<React.SetStateAction<number | null>>;
+  error: Error;
+};
+
+type FormEventSubmit = FocusEvent | React.FormEvent<HTMLFormElement>;
+
+export const CompletedTodo: React.FC<Props> = props => {
+  const {
+    todo,
+    isLoading,
+    onDelete,
+    onUpdateTodo,
+    handleTodoDoubleClick,
+    editingTodoId,
+    setEditingTodoId,
+    error,
+  } = props;
+
+  const [todoInputValue, setTodoInputValue] = useState<string>(todo.title);
+  const inputRef = useRef<HTMLInputElement>(null);
+
+  useEffect(() => {
+    if (editingTodoId === todo.id && inputRef.current) {
+      inputRef.current.focus();
+    }
+  }, [editingTodoId, todo.id]);
+
+  const onCheckTodo = () => {
+    const toUpdateTodo = { ...todo, completed: !todo.completed };
+
+    onUpdateTodo(toUpdateTodo);
+  };
+
+  const focusTodoInput = () => {
+    if (error) {
+      inputRef.current?.focus();
+    }
+  };
+
+  const handleSubmitEditingTodo = async (event: FormEventSubmit) => {
+    event.preventDefault();
+
+    const trimmedTodo = todoInputValue.trim();
+
+    setTodoInputValue(trimmedTodo);
+
+    try {
+      if (trimmedTodo === todo.title) {
+        setEditingTodoId(null);
+
+        return;
+      }
+
+      if (trimmedTodo) {
+        await onUpdateTodo({ ...todo, title: trimmedTodo });
+        setEditingTodoId(null);
+      } else {
+        await onDelete(todo.id);
+        setEditingTodoId(null);
+      }
+
+      handleTodoDoubleClick(null);
+    } catch (err) {
+      focusTodoInput();
+    }
+  };
+
+  const handleKeyDown = (event: React.KeyboardEvent) => {
+    if (event.key === 'Escape') {
+      setEditingTodoId(null);
+    }
+  };
+
+  return (
+    <div
+      data-cy="Todo"
+      className={classNames('todo', todo.completed ? 'completed' : '')}
+    >
+      <label className="todo__status-label">
+        <input
+          data-cy="TodoStatus"
+          type="checkbox"
+          className="todo__status"
+          checked={todo.completed}
+          onChange={onCheckTodo}
+        />
+      </label>
+
+      {editingTodoId === todo.id ? (
+        <form
+          onSubmit={handleSubmitEditingTodo}
+          onBlur={event => {
+            handleSubmitEditingTodo(event);
+          }}
+        >
+          <input
+            data-cy="TodoTitleField"
+            type="text"
+            className="todo__title-field"
+            placeholder="Empty todo will be deleted"
+            value={todoInputValue}
+            onChange={event => setTodoInputValue(event.target.value)}
+            ref={inputRef}
+            onKeyDown={handleKeyDown}
+          />
+        </form>
+      ) : (
+        <span
+          data-cy="TodoTitle"
+          className="todo__title"
+          onDoubleClick={event => {
+            event.preventDefault();
+            handleTodoDoubleClick(todo.id);
+          }}
+        >
+          {todo.title}
+        </span>
+      )}
+
+      {editingTodoId !== todo.id ? (
+        <button
+          type="button"
+          className="todo__remove"
+          data-cy="TodoDelete"
+          onClick={() => onDelete(todo.id)}
+        >
+          ×
+        </button>
+      ) : (
+        ''
+      )}
+
+      <div
+        data-cy="TodoLoader"
+        className={classNames('modal', 'overlay', { 'is-active': isLoading })}
+      >
+        <div className="modal-background has-background-white-ter" />
+        <div className="loader" />
+      </div>
+    </div>
+  );
+};
diff --git a/src/components/LoadingTodo.tsx b/src/components/LoadingTodo.tsx
new file mode 100644
index 0000000000..8901a18a2c
--- /dev/null
+++ b/src/components/LoadingTodo.tsx
@@ -0,0 +1,24 @@
+/* eslint-disable jsx-a11y/label-has-associated-control */
+export const LoadingTodo = () => {
+  return (
+    <div data-cy="Todo" className="todo">
+      <label className="todo__status-label">
+        <input data-cy="TodoStatus" type="checkbox" className="todo__status" />
+      </label>
+
+      <span data-cy="TodoTitle" className="todo__title">
+        Todo is being saved now
+      </span>
+
+      <button type="button" className="todo__remove" data-cy="TodoDelete">
+        ×
+      </button>
+
+      {/* 'is-active' class puts this modal on top of the todo */}
+      <div data-cy="TodoLoader" className="modal overlay is-active">
+        <div className="modal-background has-background-white-ter" />
+        <div className="loader" />
+      </div>
+    </div>
+  );
+};
diff --git a/src/types/ErrorMessage.ts b/src/types/ErrorMessage.ts
new file mode 100644
index 0000000000..3b7c5f4e93
--- /dev/null
+++ b/src/types/ErrorMessage.ts
@@ -0,0 +1,8 @@
+export enum Error {
+  Reset = '',
+  Empty = 'Title should not be empty',
+  Add = 'Unable to add a todo',
+  Delete = 'Unable to delete a todo',
+  Update = 'Unable to update a todo',
+  Load = 'Unable to load todos',
+}
diff --git a/src/types/FilterButton.ts b/src/types/FilterButton.ts
new file mode 100644
index 0000000000..174408fd69
--- /dev/null
+++ b/src/types/FilterButton.ts
@@ -0,0 +1,5 @@
+export enum Filter {
+  All = 'all',
+  Active = 'active',
+  Completed = 'completed',
+}
diff --git a/src/types/Todo.ts b/src/types/Todo.ts
new file mode 100644
index 0000000000..3f52a5fdde
--- /dev/null
+++ b/src/types/Todo.ts
@@ -0,0 +1,6 @@
+export interface Todo {
+  id: number;
+  userId: number;
+  title: string;
+  completed: boolean;
+}
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'),
+};