diff --git a/README.md b/README.md
index 47a1add059..d4a678db11 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://eg3844540-svg.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..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..01238faba4 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -1,26 +1,572 @@
-/* eslint-disable max-len */
+/* eslint-disable padding-line-between-statements */
+/* eslint-disable @typescript-eslint/indent */
+/* eslint-disable prettier/prettier */
+/* eslint-disable jsx-a11y/label-has-associated-control */
 /* eslint-disable jsx-a11y/control-has-associated-label */
-import React from 'react';
+
+import React, {
+  FormEvent,
+  KeyboardEvent,
+  useEffect,
+  useMemo,
+  useRef,
+  useState,
+} from 'react';
+import classNames from 'classnames';
+
 import { UserWarning } from './UserWarning';
+import {
+  USER_ID,
+  createTodo,
+  deleteTodo,
+  getTodos,
+  updateTodo,
+} from './api/todos';
+import { Todo } from './types/Todo';
 
-const USER_ID = 0;
+type FilterStatus = 'All' | 'Active' | 'Completed';
 
 export const App: React.FC = () => {
+  const [todos, setTodos] = useState<Todo[]>([]);
+  const [loading, setLoading] = useState(false);
+  const [error, setError] = useState('');
+  const [filter, setFilter] = useState<FilterStatus>('All');
+
+  const [title, setTitle] = useState('');
+  const [tempTodo, setTempTodo] = useState<Todo | null>(null);
+  const [isAdding, setIsAdding] = useState(false);
+
+  const [processingTodoIds, setProcessingTodoIds] = useState<number[]>([]);
+
+  const [editingTodoId, setEditingTodoId] = useState<number | null>(null);
+  const [editingTitle, setEditingTitle] = useState('');
+
+  const newTodoField = useRef<HTMLInputElement>(null);
+  const editField = useRef<HTMLInputElement>(null);
+
+  useEffect(() => {
+    setLoading(true);
+    setError('');
+
+    getTodos()
+      .then(setTodos)
+      .catch(() => {
+        setError('Unable to load todos');
+      })
+      .finally(() => {
+        setLoading(false);
+      });
+  }, []);
+
+  useEffect(() => {
+    if (!error) {
+      return;
+    }
+
+    const timer = setTimeout(() => {
+      setError('');
+    }, 3000);
+
+    return () => clearTimeout(timer);
+  }, [error]);
+
+  useEffect(() => {
+    if (editingTodoId !== null) {
+      editField.current?.focus();
+    }
+  }, [editingTodoId]);
+
+  const activeTodos = todos.filter(todo => !todo.completed);
+
+  const visibleTodos = useMemo(() => {
+    switch (filter) {
+      case 'Active':
+        return todos.filter(todo => !todo.completed);
+
+      case 'Completed':
+        return todos.filter(todo => todo.completed);
+
+      default:
+        return todos;
+    }
+  }, [todos, filter]);
+
+  const startProcessing = (todoId: number) => {
+    setProcessingTodoIds(currentIds =>
+      currentIds.includes(todoId)
+        ? currentIds
+        : [...currentIds, todoId],
+    );
+  };
+
+  const stopProcessing = (todoId: number) => {
+    setProcessingTodoIds(currentIds =>
+      currentIds.filter(id => id !== todoId),
+    );
+  };
+
+  const focusNewTodoField = () => {
+    setTimeout(() => {
+      newTodoField.current?.focus();
+    }, 0);
+  };
+
+  const handleSubmit = (event: FormEvent) => {
+    event.preventDefault();
+
+    const trimmedTitle = title.trim();
+
+    if (!trimmedTitle) {
+      setError('Title should not be empty');
+      return;
+    }
+
+    const newTodo: Todo = {
+      id: 0,
+      userId: USER_ID,
+      title: trimmedTitle,
+      completed: false,
+    };
+
+    setError('');
+    setIsAdding(true);
+    setTempTodo(newTodo);
+
+    createTodo({
+      userId: USER_ID,
+      title: trimmedTitle,
+      completed: false,
+    })
+      .then(createdTodo => {
+        setTodos(currentTodos => [...currentTodos, createdTodo]);
+        setTitle('');
+      })
+      .catch(() => {
+        setError('Unable to add a todo');
+      })
+      .finally(() => {
+        setIsAdding(false);
+        setTempTodo(null);
+        focusNewTodoField();
+      });
+  };
+
+  const handleDelete = (todoId: number) => {
+    setError('');
+    startProcessing(todoId);
+
+    return deleteTodo(todoId)
+      .then(() => {
+        setTodos(currentTodos =>
+          currentTodos.filter(todo => todo.id !== todoId),
+        );
+      })
+      .catch(() => {
+        setError('Unable to delete a todo');
+        throw new Error('Unable to delete a todo');
+      })
+      .finally(() => {
+        stopProcessing(todoId);
+        focusNewTodoField();
+      });
+  };
+
+  const handleClearCompleted = () => {
+    const completedTodos = todos.filter(todo => todo.completed);
+
+    Promise.allSettled(
+      completedTodos.map(todo => handleDelete(todo.id)),
+    ).then(results => {
+      const hasError = results.some(
+        result => result.status === 'rejected',
+      );
+
+      if (hasError) {
+        setError('Unable to delete a todo');
+      }
+    });
+  };
+
+  const handleToggleTodo = (todo: Todo) => {
+    setError('');
+    startProcessing(todo.id);
+
+    return updateTodo(todo.id, {
+      completed: !todo.completed,
+    })
+      .then(updatedTodo => {
+        setTodos(currentTodos =>
+          currentTodos.map(currentTodo =>
+            currentTodo.id === todo.id
+              ? updatedTodo
+              : currentTodo,
+          ),
+        );
+      })
+      .catch(() => {
+        setError('Unable to update a todo');
+        throw new Error('Unable to update a todo');
+      })
+      .finally(() => {
+        stopProcessing(todo.id);
+        focusNewTodoField();
+      });
+  };
+
+  const handleToggleAll = () => {
+    const shouldComplete = !todos.every(todo => todo.completed);
+
+    const todosToUpdate = todos.filter(
+      todo => todo.completed !== shouldComplete,
+    );
+
+    setError('');
+
+    todosToUpdate.forEach(todo => {
+      startProcessing(todo.id);
+    });
+
+    Promise.allSettled(
+      todosToUpdate.map(todo =>
+        updateTodo(todo.id, {
+          completed: shouldComplete,
+        })
+          .then(updatedTodo => {
+            setTodos(currentTodos =>
+              currentTodos.map(currentTodo =>
+                currentTodo.id === updatedTodo.id
+                  ? updatedTodo
+                  : currentTodo,
+              ),
+            );
+          })
+          .finally(() => {
+            stopProcessing(todo.id);
+          }),
+      ),
+    ).then(results => {
+      const hasError = results.some(
+        result => result.status === 'rejected',
+      );
+
+      if (hasError) {
+        setError('Unable to update a todo');
+      }
+
+      focusNewTodoField();
+    });
+  };
+
+  const handleStartEditing = (todo: Todo) => {
+    setEditingTodoId(todo.id);
+    setEditingTitle(todo.title);
+  };
+
+  const cancelEditing = () => {
+    setEditingTodoId(null);
+    setEditingTitle('');
+  };
+
+  const saveEditing = (todo: Todo) => {
+    const trimmedTitle = editingTitle.trim();
+
+    if (trimmedTitle === todo.title) {
+      cancelEditing();
+      focusNewTodoField();
+
+      return;
+    }
+
+    if (!trimmedTitle) {
+      handleDelete(todo.id)
+      .then(() => {
+        cancelEditing();
+      })
+      .catch(() => {
+        setError('Unable to delete a todo');
+      })
+      .finally(() => {
+        focusNewTodoField();
+      });
+
+      return;
+    }
+
+    setError('');
+    startProcessing(todo.id);
+
+    updateTodo(todo.id, {
+      title: trimmedTitle,
+    })
+      .then(updatedTodo => {
+        setTodos(currentTodos =>
+          currentTodos.map(currentTodo =>
+            currentTodo.id === todo.id
+              ? updatedTodo
+              : currentTodo,
+          ),
+        );
+
+        cancelEditing();
+      })
+      .catch(() => {
+        setError('Unable to update a todo');
+      })
+      .finally(() => {
+        stopProcessing(todo.id);
+        focusNewTodoField();
+      });
+  };
+
+  const handleEditKeyUp = (
+    event: KeyboardEvent<HTMLInputElement>,
+  ) => {
+    if (event.key === 'Escape') {
+      cancelEditing();
+      focusNewTodoField();
+    }
+  };
+
   if (!USER_ID) {
     return <UserWarning />;
   }
 
   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"
+            data-cy="ToggleAllButton"
+            className={classNames('todoapp__toggle-all', {
+              active:
+                todos.every(todo => todo.completed),
+            })}
+            onClick={handleToggleAll}
+          />
+        )}
+
+          <form onSubmit={handleSubmit}>
+            <input
+              ref={newTodoField}
+              data-cy="NewTodoField"
+              type="text"
+              className="todoapp__new-todo"
+              placeholder="What needs to be done?"
+              value={title}
+              onChange={event => setTitle(event.target.value)}
+              disabled={isAdding}
+              autoFocus
+            />
+          </form>
+        </header>
+
+        <section
+          className="todoapp__main"
+          data-cy="TodoList"
+          style={{
+            display: todos.length || tempTodo ? 'block' : 'none',
+          }}
+        >
+          {visibleTodos.map(todo => (
+            <div
+              key={todo.id}
+              data-cy="Todo"
+              className={classNames('todo', {
+                completed: todo.completed,
+              })}
+            >
+              <label className="todo__status-label">
+                <input
+                  data-cy="TodoStatus"
+                  type="checkbox"
+                  className="todo__status"
+                  checked={todo.completed}
+                  onChange={() => handleToggleTodo(todo)}
+                />
+              </label>
+
+              {editingTodoId === todo.id ? (
+                <form
+                  onSubmit={event => {
+                    event.preventDefault();
+                    saveEditing(todo);
+                  }}
+                >
+                  <input
+                    ref={editField}
+                    data-cy="TodoTitleField"
+                    type="text"
+                    className="todo__title-field"
+                    value={editingTitle}
+                    onChange={event =>
+                      setEditingTitle(event.target.value)
+                    }
+                    onBlur={() => saveEditing(todo)}
+                    onKeyUp= {handleEditKeyUp}
+
+                  />
+                </form>
+              ) : (
+                <>
+                  <span
+                    data-cy="TodoTitle"
+                    className="todo__title"
+                    onDoubleClick={() =>
+                      handleStartEditing(todo)
+                    }
+                  >
+                    {todo.title}
+                  </span>
+
+                  <button
+                    type="button"
+                    className="todo__remove"
+                    data-cy="TodoDelete"
+                    onClick={() => handleDelete(todo.id)}
+                  >
+                    ×
+                  </button>
+                </>
+              )}
+
+              <div
+                data-cy="TodoLoader"
+                className={classNames('modal overlay', {
+                  'is-active':
+                    loading ||
+                    processingTodoIds.includes(todo.id),
+                })}
+              >
+                <div className="modal-background has-background-white-ter" />
+                <div className="loader" />
+              </div>
+            </div>
+          ))}
+
+          {tempTodo && (
+            <div data-cy="Todo" className="todo">
+              <label className="todo__status-label">
+                <input
+                  data-cy="TodoStatus"
+                  type="checkbox"
+                  className="todo__status"
+                  checked={false}
+                  readOnly
+                />
+              </label>
+
+              <span
+                data-cy="TodoTitle"
+                className="todo__title"
+              >
+                {tempTodo.title}
+              </span>
+
+              <button
+                type="button"
+                className="todo__remove"
+                data-cy="TodoDelete"
+              >
+                ×
+              </button>
+
+              <div
+                data-cy="TodoLoader"
+                className="modal overlay is-active"
+              >
+                <div className="modal-background has-background-white-ter" />
+                <div className="loader" />
+              </div>
+            </div>
+          )}
+        </section>
+
+        {todos.length > 0 && (
+          <footer
+            className="todoapp__footer"
+            data-cy="Footer"
+          >
+            <span
+              className="todo-count"
+              data-cy="TodosCounter"
+            >
+              {activeTodos.length} items left
+            </span>
+
+            <nav
+              className="filter"
+              data-cy="Filter"
+            >
+              <a
+                href="#/"
+                className={classNames('filter__link', {
+                  selected: filter === 'All',
+                })}
+                data-cy="FilterLinkAll"
+                onClick={() => setFilter('All')}
+              >
+                All
+              </a>
+
+              <a
+                href="#/active"
+                className={classNames('filter__link', {
+                  selected: filter === 'Active',
+                })}
+                data-cy="FilterLinkActive"
+                onClick={() => setFilter('Active')}
+              >
+                Active
+              </a>
+
+              <a
+                href="#/completed"
+                className={classNames('filter__link', {
+                  selected: filter === 'Completed',
+                })}
+                data-cy="FilterLinkCompleted"
+                onClick={() => setFilter('Completed')}
+              >
+                Completed
+              </a>
+            </nav>
+
+            <button
+              type="button"
+              className="todoapp__clear-completed"
+              data-cy="ClearCompletedButton"
+              disabled={!todos.some(todo => todo.completed)}
+              onClick={handleClearCompleted}
+            >
+              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}
+      </div>
+    </div>
   );
 };
diff --git a/src/api/todos.ts b/src/api/todos.ts
new file mode 100644
index 0000000000..99b5e4d252
--- /dev/null
+++ b/src/api/todos.ts
@@ -0,0 +1,23 @@
+import { Todo } from '../types/Todo';
+import { client } from '../utils/fetchClient';
+
+export const USER_ID = 4352;
+
+export const getTodos = () => {
+  return client.get<Todo[]>(`/todos?userId=${USER_ID}`);
+};
+
+export const createTodo = (todo: Omit<Todo, 'id'>) => {
+  return client.post<Todo>('/todos', todo);
+};
+
+export const deleteTodo = (todoId: number) => {
+  return client.delete(`/todos/${todoId}`);
+};
+
+export const updateTodo = (
+  todoId: number,
+  data: Partial<Pick<Todo, 'title' | 'completed'>>,
+) => {
+  return client.patch<Todo>(`/todos/${todoId}`, data);
+};
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'),
+};