diff --git a/package-lock.json b/package-lock.json
index 19701e8788..0dbc74a8e1 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": "^2.1.3",
         "@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": "2.1.3",
+      "resolved": "https://registry.npmjs.org/@mate-academy/scripts/-/scripts-2.1.3.tgz",
+      "integrity": "sha512-a07wHTj/1QUK2Aac5zHad+sGw4rIvcNl5lJmJpAD7OxeSbnCdyI6RXUHwXhjF5MaVo9YHrJ0xVahyERS2IIyBQ==",
       "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..6d0f20adcc 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": "^2.1.3",
     "@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..3082465680 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -1,26 +1,241 @@
-/* eslint-disable max-len */
-/* eslint-disable jsx-a11y/control-has-associated-label */
-import React from 'react';
+import React, { useState, useEffect, useRef } from 'react';
+import classNames from 'classnames';
+
+import { Todo } from './types/Todo';
+import { ErrorMessage } from './types/ErrorMessage';
+import { getTodos, addTodo, deleteTodo, updateTodo } from './api/todos';
+import { TodoList } from './components/TodoList';
+import { TodoFilter, FilterValue } from './components/TodoFilter';
+import { ErrorNotification } from './components/ErrorNotification';
 import { UserWarning } from './UserWarning';
 
-const USER_ID = 0;
+const USER_ID = 2425;
 
 export const App: React.FC = () => {
-  if (!USER_ID) {
+  const [todos, setTodos] = useState<Todo[]>([]);
+  const [filter, setFilter] = useState<FilterValue>('all');
+  const [errorMessage, setErrorMessage] = useState<ErrorMessage | null>(null);
+  const [newTitle, setNewTitle] = useState('');
+  const [tempTodo, setTempTodo] = useState<Todo | null>(null);
+  const [loadingTodoIds, setLoadingTodoIds] = useState<number[]>([]);
+  const [isAdding, setIsAdding] = useState(false);
+
+  const inputRef = useRef<HTMLInputElement>(null);
+
+  const activeUserId = (() => {
+    try {
+      const user = localStorage.getItem('user');
+
+      return user ? JSON.parse(user).id : USER_ID;
+    } catch {
+      return USER_ID;
+    }
+  })();
+
+  useEffect(() => {
+    if (!activeUserId) {
+      return;
+    }
+
+    getTodos(activeUserId)
+      .then(setTodos)
+      .catch(() => {
+        setErrorMessage(ErrorMessage.Load);
+      });
+  }, [activeUserId]);
+
+  useEffect(() => {
+    if (inputRef.current) {
+      inputRef.current.focus();
+    }
+  }, [todos, tempTodo]);
+
+  if (!activeUserId) {
     return <UserWarning />;
   }
 
+  const handleAddTodo = (e: React.FormEvent) => {
+    e.preventDefault();
+    const trimmedTitle = newTitle.trim();
+
+    if (!trimmedTitle) {
+      setErrorMessage(ErrorMessage.EmptyTitle);
+
+      return;
+    }
+
+    const optimisticTodo: Todo = {
+      id: 0,
+      userId: activeUserId,
+      title: trimmedTitle,
+      completed: false,
+    };
+
+    setTempTodo(optimisticTodo);
+    setIsAdding(true);
+    setErrorMessage(null);
+
+    addTodo({ userId: activeUserId, title: trimmedTitle, completed: false })
+      .then(newTodo => {
+        setTodos(prev => [...prev, newTodo]);
+        setNewTitle('');
+      })
+      .catch(() => {
+        setErrorMessage(ErrorMessage.Add);
+      })
+      .finally(() => {
+        setTempTodo(null);
+        setIsAdding(false);
+        inputRef.current?.focus();
+      });
+  };
+
+  const handleDeleteTodo = (todoId: number): Promise<void> => {
+    setLoadingTodoIds(prev => [...prev, todoId]);
+    setErrorMessage(null);
+
+    return deleteTodo(todoId)
+      .then(() => {
+        setTodos(prev => prev.filter(todo => todo.id !== todoId));
+      })
+      .catch(err => {
+        setErrorMessage(ErrorMessage.Delete);
+        throw err;
+      })
+      .finally(() => {
+        setLoadingTodoIds(prev => prev.filter(id => id !== todoId));
+        inputRef.current?.focus();
+      });
+  };
+
+  const handleUpdateTodo = (
+    todoId: number,
+    data: Partial<Todo>,
+  ): Promise<void> => {
+    setLoadingTodoIds(prev => [...prev, todoId]);
+    setErrorMessage(null);
+
+    return updateTodo(todoId, data)
+      .then(updatedTodo => {
+        setTodos(prev =>
+          prev.map(todo => (todo.id === todoId ? updatedTodo : todo)),
+        );
+      })
+      .catch(err => {
+        setErrorMessage(ErrorMessage.Update);
+        throw err;
+      })
+      .finally(() => {
+        setLoadingTodoIds(prev => prev.filter(id => id !== todoId));
+        inputRef.current?.focus();
+      });
+  };
+
+  const handleToggleAll = () => {
+    const allCompleted = todos.every(t => t.completed);
+    const targetCompleted = !allCompleted;
+    const todosToUpdate = todos.filter(t => t.completed !== targetCompleted);
+
+    todosToUpdate.forEach(todo => {
+      handleUpdateTodo(todo.id, { completed: targetCompleted }).catch(() => {});
+    });
+  };
+
+  const handleClearCompleted = () => {
+    const completedTodos = todos.filter(t => t.completed);
+
+    completedTodos.forEach(todo => {
+      handleDeleteTodo(todo.id).catch(() => {});
+    });
+  };
+
+  const visibleTodos = todos.filter(todo => {
+    if (filter === 'active') {
+      return !todo.completed;
+    }
+
+    if (filter === 'completed') {
+      return todo.completed;
+    }
+
+    return true;
+  });
+
+  const allCompleted = todos.length > 0 && todos.every(t => t.completed);
+  const activeTodosCount = todos.filter(t => !t.completed).length;
+  const completedTodosCount = todos.filter(t => t.completed).length;
+  const activeCountText = `${activeTodosCount} ${
+    activeTodosCount === 1 ? 'item' : 'items'
+  } left`;
+
   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
+              data-cy="ToggleAllButton"
+              type="button"
+              className={classNames('todoapp__toggle-all', {
+                active: allCompleted,
+              })}
+              onClick={handleToggleAll}
+            />
+          )}
+
+          <form onSubmit={handleAddTodo}>
+            <input
+              data-cy="NewTodoField"
+              type="text"
+              ref={inputRef}
+              className="todoapp__new-todo"
+              placeholder="What needs to be done?"
+              value={newTitle}
+              onChange={e => setNewTitle(e.target.value)}
+              disabled={isAdding}
+            />
+          </form>
+        </header>
+
+        {(todos.length > 0 || tempTodo) && (
+          <>
+            <TodoList
+              todos={visibleTodos}
+              tempTodo={tempTodo}
+              loadingTodoIds={loadingTodoIds}
+              onDelete={handleDeleteTodo}
+              onUpdate={handleUpdateTodo}
+            />
+
+            {todos.length > 0 && (
+              <footer className="todoapp__footer" data-cy="Footer">
+                <span className="todo-count" data-cy="TodosCounter">
+                  {activeCountText}
+                </span>
+
+                <TodoFilter filter={filter} onChange={setFilter} />
+
+                <button
+                  data-cy="ClearCompletedButton"
+                  type="button"
+                  className="todoapp__clear-completed"
+                  disabled={completedTodosCount === 0}
+                  onClick={handleClearCompleted}
+                >
+                  Clear completed
+                </button>
+              </footer>
+            )}
+          </>
+        )}
+      </div>
+
+      <ErrorNotification
+        message={errorMessage}
+        onClose={() => setErrorMessage(null)}
+      />
+    </div>
   );
 };
diff --git a/src/api/todos.ts b/src/api/todos.ts
new file mode 100644
index 0000000000..4f252f733e
--- /dev/null
+++ b/src/api/todos.ts
@@ -0,0 +1,18 @@
+import { Todo } from '../types/Todo';
+import { client } from '../utils/fetchClient';
+
+export const getTodos = (userId: number) => {
+  return client.get<Todo[]>(`/todos?userId=${userId}`);
+};
+
+export const addTodo = ({ userId, title, completed }: Omit<Todo, 'id'>) => {
+  return client.post<Todo>('/todos', { userId, title, completed });
+};
+
+export const deleteTodo = (todoId: number) => {
+  return client.delete(`/todos/${todoId}`);
+};
+
+export const updateTodo = (todoId: number, data: Partial<Todo>) => {
+  return client.patch<Todo>(`/todos/${todoId}`, data);
+};
diff --git a/src/components/ErrorNotification.tsx b/src/components/ErrorNotification.tsx
new file mode 100644
index 0000000000..db84006954
--- /dev/null
+++ b/src/components/ErrorNotification.tsx
@@ -0,0 +1,46 @@
+import React, { useEffect } from 'react';
+import classNames from 'classnames';
+
+import { ErrorMessage } from '../types/ErrorMessage';
+
+interface Props {
+  message: ErrorMessage | null;
+  onClose: () => void;
+}
+
+export const ErrorNotification: React.FC<Props> = ({ message, onClose }) => {
+  useEffect(() => {
+    if (!message) {
+      return;
+    }
+
+    const timer = setTimeout(() => {
+      onClose();
+    }, 3000);
+
+    return () => {
+      clearTimeout(timer);
+    };
+  }, [message, onClose]);
+
+  return (
+    <div
+      data-cy="ErrorNotification"
+      className={classNames(
+        'notification',
+        'is-danger',
+        'is-light',
+        'has-text-weight-normal',
+        { hidden: !message },
+      )}
+    >
+      <button
+        data-cy="HideErrorButton"
+        type="button"
+        className="delete"
+        onClick={onClose}
+      />
+      {message}
+    </div>
+  );
+};
diff --git a/src/components/TodoFilter.tsx b/src/components/TodoFilter.tsx
new file mode 100644
index 0000000000..1ce2eb3c43
--- /dev/null
+++ b/src/components/TodoFilter.tsx
@@ -0,0 +1,59 @@
+import React from 'react';
+import classNames from 'classnames';
+
+type FilterValue = 'all' | 'active' | 'completed';
+
+interface Props {
+  filter: FilterValue;
+  onChange: (filter: FilterValue) => void;
+}
+
+export const TodoFilter: React.FC<Props> = ({ filter, onChange }) => {
+  return (
+    <nav className="filter" data-cy="Filter">
+      <a
+        data-cy="FilterLinkAll"
+        href="#/"
+        className={classNames('filter__link', {
+          selected: filter === 'all',
+        })}
+        onClick={e => {
+          e.preventDefault();
+          onChange('all');
+        }}
+      >
+        All
+      </a>
+
+      <a
+        data-cy="FilterLinkActive"
+        href="#/active"
+        className={classNames('filter__link', {
+          selected: filter === 'active',
+        })}
+        onClick={e => {
+          e.preventDefault();
+          onChange('active');
+        }}
+      >
+        Active
+      </a>
+
+      <a
+        data-cy="FilterLinkCompleted"
+        href="#/completed"
+        className={classNames('filter__link', {
+          selected: filter === 'completed',
+        })}
+        onClick={e => {
+          e.preventDefault();
+          onChange('completed');
+        }}
+      >
+        Completed
+      </a>
+    </nav>
+  );
+};
+
+export type { FilterValue };
diff --git a/src/components/TodoItem.tsx b/src/components/TodoItem.tsx
new file mode 100644
index 0000000000..104785df13
--- /dev/null
+++ b/src/components/TodoItem.tsx
@@ -0,0 +1,144 @@
+import React, { useState, useRef, useEffect } from 'react';
+import classNames from 'classnames';
+
+import { Todo } from '../types/Todo';
+
+interface Props {
+  todo: Todo;
+  isLoading: boolean;
+  onDelete: (todoId: number) => Promise<void>;
+  onUpdate: (todoId: number, data: Partial<Todo>) => Promise<void>;
+}
+
+export const TodoItem: React.FC<Props> = ({
+  todo,
+  isLoading,
+  onDelete,
+  onUpdate,
+}) => {
+  const [isEditing, setIsEditing] = useState(false);
+  const [editTitle, setEditTitle] = useState(todo.title);
+  const editFieldRef = useRef<HTMLInputElement>(null);
+
+  useEffect(() => {
+    if (isEditing && editFieldRef.current) {
+      editFieldRef.current.focus();
+    }
+  }, [isEditing]);
+
+  const handleStatusChange = () => {
+    onUpdate(todo.id, { completed: !todo.completed });
+  };
+
+  const handleSave = () => {
+    if (!isEditing || isLoading) {
+      return;
+    }
+
+    const trimmedTitle = editTitle.trim();
+
+    if (trimmedTitle === todo.title) {
+      setIsEditing(false);
+
+      return;
+    }
+
+    if (!trimmedTitle) {
+      onDelete(todo.id)
+        .then(() => {
+          setIsEditing(false);
+        })
+        .catch(() => {
+          if (editFieldRef.current) {
+            editFieldRef.current.focus();
+          }
+        });
+
+      return;
+    }
+
+    onUpdate(todo.id, { title: trimmedTitle })
+      .then(() => {
+        setIsEditing(false);
+      })
+      .catch(() => {
+        if (editFieldRef.current) {
+          editFieldRef.current.focus();
+        }
+      });
+  };
+
+  const handleFormSubmit = (e: React.FormEvent) => {
+    e.preventDefault();
+    handleSave();
+  };
+
+  const handleKeyUp = (e: React.KeyboardEvent<HTMLInputElement>) => {
+    if (e.key === 'Escape') {
+      setIsEditing(false);
+      setEditTitle(todo.title);
+    }
+  };
+
+  return (
+    <div
+      data-cy="Todo"
+      className={classNames('todo', { completed: todo.completed })}
+    >
+      {/* eslint-disable-next-line jsx-a11y/label-has-associated-control */}
+      <label htmlFor={`todo-status-${todo.id}`} className="todo__status-label">
+        <input
+          id={`todo-status-${todo.id}`}
+          data-cy="TodoStatus"
+          type="checkbox"
+          className="todo__status"
+          checked={todo.completed}
+          onChange={handleStatusChange}
+        />
+      </label>
+
+      {isEditing ? (
+        <form onSubmit={handleFormSubmit}>
+          <input
+            data-cy="TodoTitleField"
+            type="text"
+            className="todo__title-field"
+            placeholder="Empty todo will be deleted"
+            value={editTitle}
+            onChange={e => setEditTitle(e.target.value)}
+            onBlur={handleSave}
+            onKeyUp={handleKeyUp}
+            ref={editFieldRef}
+            disabled={isLoading}
+          />
+        </form>
+      ) : (
+        <>
+          <span
+            data-cy="TodoTitle"
+            className="todo__title"
+            onDoubleClick={() => setIsEditing(true)}
+          >
+            {todo.title}
+          </span>
+          <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/TodoList.tsx b/src/components/TodoList.tsx
new file mode 100644
index 0000000000..a22bfd8ab2
--- /dev/null
+++ b/src/components/TodoList.tsx
@@ -0,0 +1,43 @@
+import React from 'react';
+
+import { Todo } from '../types/Todo';
+import { TodoItem } from './TodoItem';
+
+interface Props {
+  todos: Todo[];
+  tempTodo: Todo | null;
+  loadingTodoIds: number[];
+  onDelete: (todoId: number) => Promise<void>;
+  onUpdate: (todoId: number, data: Partial<Todo>) => Promise<void>;
+}
+
+export const TodoList: React.FC<Props> = ({
+  todos,
+  tempTodo,
+  loadingTodoIds,
+  onDelete,
+  onUpdate,
+}) => {
+  return (
+    <section className="todoapp__main" data-cy="TodoList">
+      {todos.map(todo => (
+        <TodoItem
+          key={todo.id}
+          todo={todo}
+          isLoading={loadingTodoIds.includes(todo.id)}
+          onDelete={onDelete}
+          onUpdate={onUpdate}
+        />
+      ))}
+
+      {tempTodo && (
+        <TodoItem
+          todo={tempTodo}
+          isLoading={true}
+          onDelete={() => Promise.resolve()}
+          onUpdate={() => Promise.resolve()}
+        />
+      )}
+    </section>
+  );
+};
diff --git a/src/types/ErrorMessage.ts b/src/types/ErrorMessage.ts
new file mode 100644
index 0000000000..4d4347ca85
--- /dev/null
+++ b/src/types/ErrorMessage.ts
@@ -0,0 +1,7 @@
+export enum ErrorMessage {
+  Load = 'Unable to load todos',
+  EmptyTitle = 'Title should not be empty',
+  Add = 'Unable to add a todo',
+  Delete = 'Unable to delete a todo',
+  Update = 'Unable to update a todo',
+}
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..3ffe70eeba
--- /dev/null
+++ b/src/utils/fetchClient.ts
@@ -0,0 +1,41 @@
+const BASE_URL = 'https://mate.academy/students-api';
+
+function wait(delay: number) {
+  return new Promise(resolve => {
+    setTimeout(resolve, delay);
+  });
+}
+
+type RequestMethod = 'GET' | 'POST' | 'PATCH' | 'DELETE';
+
+function request<T>(
+  url: string,
+  method: RequestMethod = 'GET',
+  data: unknown = null,
+): Promise<T> {
+  const options: RequestInit = { method };
+
+  if (data) {
+    options.body = JSON.stringify(data);
+    options.headers = {
+      'Content-Type': 'application/json; charset=UTF-8',
+    };
+  }
+
+  return wait(300)
+    .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: unknown) => request<T>(url, 'POST', data),
+  patch: <T>(url: string, data: unknown) => request<T>(url, 'PATCH', data),
+  delete: (url: string) => request(url, 'DELETE'),
+};