diff --git a/README.md b/README.md
index 8f93235bf6..b7e41e003e 100644
--- a/README.md
+++ b/README.md
@@ -41,4 +41,4 @@ 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://taras-bilas.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 5749bdf784..21da353e4c 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -1,24 +1,176 @@
-/* eslint-disable max-len */
+/* eslint-disable @typescript-eslint/no-unused-vars */
 /* eslint-disable jsx-a11y/control-has-associated-label */
-import React from 'react';
+import React, { useCallback, useEffect, useMemo, useState } from 'react';
 import { UserWarning } from './UserWarning';
+import { TodoHeader } from './components/TodoHeader';
+import { TodoList } from './components/TodoList';
+import { TodoItem } from './components/TodoItem';
+import { TodoFooter } from './components/TodoFooter';
+import { deleteTodos, getTodos, updateTodos } from './api/todos';
+import { Todo } from './types/Todo';
+import { Status } from './types/Status';
+import { Error } from './types/Error';
+import { Errors } from './components/Errors';
 
-const USER_ID = 0;
+const USER_ID = 11142;
 
 export const App: React.FC = () => {
+  const [todos, setTodos] = useState<Todo[]>([]);
+  const [status, setStatus] = useState(Status.all);
+  const [error, setError] = useState(Error.without);
+  const [tempTodo, setTempTodo] = useState<Todo | null>(null);
+  const [deletingIds, setDeletingIds] = useState<number[]>([]);
+  const [processing, setProcessing] = useState(false);
+  const numberOfAllTodos = todos.length;
+  const numberOfCompletedTodos = todos.filter(todo => todo.completed).length;
+  const numberOfActiveTodos = todos.filter(todo => !todo.completed).length;
+  const areAllCompleted = todos.every(todo => todo.completed);
+
+  useEffect(() => {
+    getTodos(USER_ID)
+      .then(setTodos)
+      .catch(() => setError(Error.load));
+  }, []);
+
+  const toggleTodo = useCallback((todo: Todo) => {
+    const changedStatus = { completed: !todo.completed };
+
+    setDeletingIds((ids) => [...ids, todo.id]);
+
+    updateTodos(todo.id, changedStatus)
+      .then(() => {
+        return getTodos(USER_ID)
+          .then(setTodos)
+          .catch(() => setError(Error.load));
+      })
+      .catch(() => setError(Error.update))
+      .finally(() => {
+        setDeletingIds((ids) => ids.filter(id => id !== todo.id));
+      });
+  }, [todos]);
+
+  const toggleAll = () => {
+    if (areAllCompleted) {
+      todos.forEach(todo => {
+        toggleTodo(todo);
+      });
+    }
+
+    todos
+      .filter(todo => !todo.completed)
+      .forEach(todo => toggleTodo(todo));
+  };
+
+  const renameTodo = useCallback((todoId: number, newTitle: string) => {
+    if (newTitle.trim().length === 0) {
+      setError(Error.update);
+
+      return;
+    }
+
+    const newData = { title: newTitle };
+
+    setDeletingIds((ids) => [...ids, todoId]);
+
+    updateTodos(todoId, newData)
+      .then(() => {
+        return getTodos(USER_ID)
+          .then(setTodos)
+          .catch(() => setError(Error.load));
+      })
+      .catch(() => {
+        setError(Error.update);
+      })
+      .finally(() => {
+        setDeletingIds((ids) => ids.filter(id => id !== todoId));
+      });
+  }, [todos]);
+
+  const deleteTodo = useCallback((todoId: number) => {
+    setDeletingIds((ids) => [...ids, todoId]);
+
+    deleteTodos(todoId)
+      .then(() => setTodos(
+        currentTodos => currentTodos.filter(todo => todo.id !== todoId),
+      ))
+      .catch(() => setError(Error.delete))
+      .finally(() => {
+        setDeletingIds((ids) => ids.filter(id => id !== todoId));
+      });
+  }, [todos]);
+
+  const visibleTodos = useMemo(() => {
+    if (todos) {
+      return todos
+        .filter(todo => {
+          switch (status) {
+            case Status.completed:
+              return todo.completed;
+
+            case Status.active:
+              return !todo.completed;
+
+            default:
+              return true;
+          }
+        });
+    }
+
+    return [];
+  }, [todos, status]);
+
   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">
+        <TodoHeader
+          userId={USER_ID}
+          setTempTodo={setTempTodo}
+          setError={setError}
+          setTodos={setTodos}
+          processing={processing}
+          setProcessing={setProcessing}
+          areAllCompleted={areAllCompleted}
+          toggleAll={toggleAll}
+        />
+
+        {numberOfAllTodos !== 0 && (
+          <TodoList
+            todos={visibleTodos}
+            toggleTodo={toggleTodo}
+            onRenameTodo={renameTodo}
+            onDeleteTodo={deleteTodo}
+            deletingIds={deletingIds}
+          />
+        )}
+
+        {tempTodo && (
+          <TodoItem
+            tempTodo={tempTodo}
+            processing={processing}
+          />
+        )}
+
+        {numberOfAllTodos !== 0 && (
+          <TodoFooter
+            numberOfActiveTodos={numberOfActiveTodos}
+            numberOfCompletedTodos={numberOfCompletedTodos}
+            onStatusChange={setStatus}
+            status={status}
+            onDeleteTodo={deleteTodo}
+            todos={todos}
+          />
+        )}
+      </div>
+
+      {error !== Error.without && (
+        <Errors error={error} onClearErrors={setError} />
+      )}
+    </div>
   );
 };
diff --git a/src/api/todos.ts b/src/api/todos.ts
new file mode 100644
index 0000000000..e14f79c17c
--- /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=${userId}`);
+};
+
+export const addTodos = (userId: number, data: any) => {
+  return client.post<Todo[]>(`/todos?userId=${userId}`, data);
+};
+
+export const deleteTodos = (todoId: number) => {
+  return client.delete(`/todos/${todoId}`);
+};
+
+export const updateTodos = (todoId: number, data: any) => {
+  return client.patch(`/todos/${todoId}`, data);
+};
diff --git a/src/components/Errors.tsx b/src/components/Errors.tsx
new file mode 100644
index 0000000000..cd6e22d69e
--- /dev/null
+++ b/src/components/Errors.tsx
@@ -0,0 +1,41 @@
+/* eslint-disable jsx-a11y/control-has-associated-label */
+/* eslint-disable quote-props */
+import { useEffect } from 'react';
+import cn from 'classnames';
+import { Error } from '../types/Error';
+
+type Props = {
+  error: Error,
+  onClearErrors: React.Dispatch<React.SetStateAction<Error>>,
+};
+
+export const Errors: React.FC<Props> = ({ error, onClearErrors }) => {
+  useEffect(() => {
+    setTimeout(() => onClearErrors(Error.without), 3000);
+  }, [error]);
+
+  return (
+    <div
+      className={cn(
+        'notification is-danger is-light has-text-weight-normal',
+        { 'hidden': error === Error.without },
+      )}
+    >
+      <button
+        type="button"
+        className="delete"
+        onClick={() => onClearErrors(Error.without)}
+      />
+
+      {error === Error.load && 'Unable to load todos'}
+
+      {error === Error.add && 'Unable to add a todo'}
+
+      {error === Error.delete && 'Unable to delete a todo'}
+
+      {error === Error.update && 'Unable to update a todo'}
+
+      {error === Error.empty && 'Title can\'t be empty'}
+    </div>
+  );
+};
diff --git a/src/components/TodoFooter.tsx b/src/components/TodoFooter.tsx
new file mode 100644
index 0000000000..e3598589df
--- /dev/null
+++ b/src/components/TodoFooter.tsx
@@ -0,0 +1,85 @@
+/* eslint-disable quote-props */
+import cn from 'classnames';
+import { Status } from '../types/Status';
+import { Todo } from '../types/Todo';
+
+type Props = {
+  numberOfActiveTodos: number,
+  numberOfCompletedTodos: number,
+  onStatusChange: React.Dispatch<React.SetStateAction<Status>>,
+  status: Status,
+  onDeleteTodo: (todoId: number) => void,
+  todos: Todo[],
+};
+
+export const TodoFooter: React.FC<Props> = ({
+  numberOfActiveTodos,
+  numberOfCompletedTodos,
+  onStatusChange,
+  status,
+  onDeleteTodo,
+  todos,
+}) => {
+  const deleteCompleted = () => {
+    todos.filter(todo => todo.completed).forEach((todo) => {
+      onDeleteTodo(todo.id);
+    });
+  };
+
+  return (
+    <footer className="todoapp__footer">
+      <span className="todo-count">
+        {numberOfActiveTodos}
+        {' '}
+        items left
+      </span>
+
+      <nav className="filter">
+        <a
+          href="#/"
+          className={cn(
+            'filter__link',
+            { 'selected': status === Status.all },
+          )}
+          onClick={() => onStatusChange(Status.all)}
+        >
+          All
+        </a>
+
+        <a
+          href="#/active"
+          className={cn(
+            'filter__link',
+            { 'selected': status === Status.active },
+          )}
+          defaultValue={Status.active}
+          onClick={() => onStatusChange(Status.active)}
+        >
+          Active
+        </a>
+
+        <a
+          href="#/completed"
+          className={cn(
+            'filter__link',
+            { 'selected': status === Status.completed },
+          )}
+          defaultValue={Status.completed}
+          onClick={() => onStatusChange(Status.completed)}
+        >
+          Completed
+        </a>
+      </nav>
+
+      {numberOfCompletedTodos !== 0 && (
+        <button
+          type="button"
+          className="todoapp__clear-completed"
+          onClick={deleteCompleted}
+        >
+          Clear completed
+        </button>
+      )}
+    </footer>
+  );
+};
diff --git a/src/components/TodoHeader.tsx b/src/components/TodoHeader.tsx
new file mode 100644
index 0000000000..a61c50a90b
--- /dev/null
+++ b/src/components/TodoHeader.tsx
@@ -0,0 +1,89 @@
+/* eslint-disable quote-props */
+/* eslint-disable jsx-a11y/control-has-associated-label */
+import { useState } from 'react';
+import cn from 'classnames';
+import { addTodos, getTodos } from '../api/todos';
+import { Todo } from '../types/Todo';
+import { Error } from '../types/Error';
+
+type Props = {
+  userId: number,
+  setTempTodo: React.Dispatch<React.SetStateAction<Todo | null>>,
+  setError: React.Dispatch<React.SetStateAction<Error>>,
+  setTodos: React.Dispatch<React.SetStateAction<Todo[]>>,
+  processing: boolean,
+  setProcessing: React.Dispatch<React.SetStateAction<boolean>>,
+  areAllCompleted: boolean,
+  toggleAll: () => void,
+
+};
+
+export const TodoHeader: React.FC<Props> = ({
+  userId,
+  setTempTodo,
+  setError,
+  setTodos,
+  processing,
+  setProcessing,
+  areAllCompleted,
+  toggleAll,
+}) => {
+  const [todoTitle, setTodoTitle] = useState('');
+
+  const submitHandler = (event: React.FormEvent<HTMLFormElement>) => {
+    event.preventDefault();
+
+    if (todoTitle.trim().length === 0) {
+      setError(Error.empty);
+
+      return;
+    }
+
+    const newTodo = {
+      title: todoTitle,
+      completed: false,
+      userId,
+    };
+
+    setTodoTitle('');
+    setProcessing(true);
+
+    addTodos(userId, newTodo)
+      .then(() => {
+        return getTodos(userId)
+          .then(setTodos)
+          .catch(() => setError(Error.load));
+      })
+      .catch(() => setError(Error.add))
+      .finally(() => {
+        setTempTodo(null);
+        setProcessing(false);
+      });
+
+    setTempTodo({
+      id: 0,
+      ...newTodo,
+    });
+  };
+
+  return (
+    <header className="todoapp__header">
+      <form onSubmit={submitHandler}>
+        <button
+          type="button"
+          className={cn('todoapp__toggle-all', { 'active': areAllCompleted })}
+          onClick={toggleAll}
+        />
+
+        <input
+          disabled={processing}
+          type="text"
+          className="todoapp__new-todo"
+          placeholder="What needs to be done?"
+          value={todoTitle}
+          onChange={event => setTodoTitle(event.target.value)}
+        />
+      </form>
+    </header>
+  );
+};
diff --git a/src/components/TodoItem.tsx b/src/components/TodoItem.tsx
new file mode 100644
index 0000000000..37ab359eb4
--- /dev/null
+++ b/src/components/TodoItem.tsx
@@ -0,0 +1,28 @@
+import cn from 'classnames';
+import { Todo } from '../types/Todo';
+
+type Props = {
+  tempTodo: Todo | null,
+  processing: boolean,
+};
+
+export const TodoItem: React.FC<Props> = ({ tempTodo, processing }) => {
+  return (
+    <>
+      <div className="todo">
+        <label className="todo__status-label">
+          <input
+            type="checkbox"
+            className="todo__status"
+            checked
+          />
+        </label>
+        <span className="todo__title">{tempTodo?.title}</span>
+        <div className={cn('modal overlay', { 'is-active': processing })}>
+          <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..6433605825
--- /dev/null
+++ b/src/components/TodoList.tsx
@@ -0,0 +1,34 @@
+/* eslint-disable max-len */
+/* eslint-disable quote-props */
+import { Todo } from '../types/Todo';
+import { TodoRow } from './TodoRow';
+
+type Props = {
+  todos: Todo[],
+  toggleTodo: (todo: Todo) => void,
+  onRenameTodo: (todoId: number, title: string) => void,
+  onDeleteTodo: (todoId: number) => void,
+  deletingIds: number[],
+};
+
+export const TodoList: React.FC<Props> = ({
+  todos,
+  toggleTodo,
+  onRenameTodo,
+  onDeleteTodo,
+  deletingIds,
+}) => {
+  return (
+    <section className="todoapp__main">
+      {todos.map(todo => (
+        <TodoRow
+          todo={todo}
+          toggleTodo={toggleTodo}
+          onRenameTodo={onRenameTodo}
+          onDeleteTodo={onDeleteTodo}
+          deletingIds={deletingIds}
+        />
+      ))}
+    </section>
+  );
+};
diff --git a/src/components/TodoRow.tsx b/src/components/TodoRow.tsx
new file mode 100644
index 0000000000..9a65aaa44e
--- /dev/null
+++ b/src/components/TodoRow.tsx
@@ -0,0 +1,98 @@
+/* eslint-disable quote-props */
+import { useState } from 'react';
+import cn from 'classnames';
+import { Todo } from '../types/Todo';
+
+type Props = {
+  todo: Todo,
+  toggleTodo: (todo: Todo) => void,
+  onRenameTodo: (todoId: number, title: string) => void,
+  onDeleteTodo: (todoId: number) => void,
+  deletingIds: number[],
+};
+
+export const TodoRow: React.FC<Props> = ({
+  todo,
+  toggleTodo,
+  onRenameTodo,
+  onDeleteTodo,
+  deletingIds,
+}) => {
+  const [editing, setEditing] = useState(false);
+  const [title, setTitle] = useState(todo.title);
+
+  const handleKeyUp = (event: React.KeyboardEvent) => {
+    if (event.key === 'Escape') {
+      setEditing(false);
+      setTitle(todo.title);
+    }
+  };
+
+  const handleSubmit = (event: React.FormEvent) => {
+    event.preventDefault();
+
+    if (title) {
+      onRenameTodo(todo.id, title);
+    } else {
+      onDeleteTodo(todo.id);
+    }
+
+    setEditing(false);
+  };
+
+  return (
+    <div
+      className={cn('todo', { 'completed': todo.completed })}
+      key={todo.id}
+    >
+      <label className="todo__status-label">
+        <input
+          type="checkbox"
+          className="todo__status"
+          onClick={() => toggleTodo(todo)}
+          checked
+        />
+      </label>
+      {editing ? (
+        <form onSubmit={handleSubmit}>
+          <input
+            type="text"
+            className="todo__title-field"
+            placeholder="Empty todo will be deleted"
+            value={title}
+            onKeyUp={handleKeyUp}
+            onBlur={handleSubmit}
+            onChange={event => setTitle(event.target.value)}
+          />
+        </form>
+      ) : (
+        <>
+          <span
+            className="todo__title"
+            onDoubleClick={() => {
+              setEditing(true);
+              setTitle(todo.title);
+            }}
+          >
+            {todo.title}
+          </span>
+          <div className={cn(
+            'modal overlay',
+            { 'is-active': deletingIds.includes(todo.id) },
+          )}
+          >
+            <div className="modal-background has-background-white-ter" />
+            <div className="loader" />
+          </div>
+          <button
+            type="button"
+            className="todo__remove"
+            onClick={() => onDeleteTodo(todo.id)}
+          >
+            ×
+          </button>
+        </>
+      )}
+    </div>
+  );
+};
diff --git a/src/types/Error.ts b/src/types/Error.ts
new file mode 100644
index 0000000000..0faed8bd5e
--- /dev/null
+++ b/src/types/Error.ts
@@ -0,0 +1,8 @@
+export enum Error {
+  without = '',
+  empty = 'empty',
+  load = 'load',
+  add = 'add',
+  update = 'update',
+  delete = 'delete',
+}
diff --git a/src/types/Status.ts b/src/types/Status.ts
new file mode 100644
index 0000000000..66910400f2
--- /dev/null
+++ b/src/types/Status.ts
@@ -0,0 +1,5 @@
+export enum Status {
+  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..42421feae0
--- /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',
+    };
+  }
+
+  // we wait for testing purpose to see loaders
+  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: any) => request<T>(url, 'POST', data),
+  patch: <T>(url: string, data: any) => request<T>(url, 'PATCH', data),
+  delete: (url: string) => request(url, 'DELETE'),
+};