diff --git a/README.md b/README.md
index 47a1add059..73be725940 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://Nika-Andriy.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..ddb56f77f5 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -1,26 +1,187 @@
-/* eslint-disable max-len */
+/* eslint-disable jsx-a11y/label-has-associated-control */
 /* eslint-disable jsx-a11y/control-has-associated-label */
-import React from 'react';
+import React, { useEffect, useState } from 'react';
 import { UserWarning } from './UserWarning';
-
-const USER_ID = 0;
+import { deleteTodo, getTodos, patchTodo, USER_ID } from './api/todos';
+import { NewTodoList } from './components/NewTodoList';
+import { Todo } from './types/Todo';
+import { TodoList } from './components/TodoList';
+import { Footer } from './components/Footer';
+import { FILTER } from './api/filter';
+import { Filter } from './types/Filter';
+import { TodoItem } from './components/TodoItem';
+import { ErrorMessage } from './types/ErrorMessage';
+import { ErrorNotification } from './components/ErrorNotification';
 
 export const App: React.FC = () => {
+  const [title, setTitle] = useState('');
+  const [todos, setTodos] = useState<Todo[]>([]);
+  const [errorMessage, setErrorMessage] = useState('');
+  const [isLoading, setIsLoading] = useState(false);
+  const [isDeleting, setIsDeleting] = useState(false);
+  const [filter, setFilter] = useState<Filter>(FILTER.all);
+  const [tempTodo, setTempTodo] = useState<Todo | null>(null);
+  const [deletingTodoIds, setDeletingTodoIds] = useState<number[]>([]);
+  const [updatingTodoIds, setUpdatingTodoIds] = useState<number[]>([]);
+
+  const isTodosNotEmpty = todos.length > 0;
+
+  const loadingPosts = () => {
+    setIsLoading(true);
+
+    getTodos()
+      .then(setTodos)
+      .catch(() => setErrorMessage(ErrorMessage.LOAD_TODO))
+      .finally(() => setIsLoading(false));
+  };
+
+  useEffect(() => {
+    loadingPosts();
+  }, []);
+
+  useEffect(() => {
+    if (!errorMessage) {
+      return;
+    }
+
+    const timerId = window.setTimeout(() => {
+      setErrorMessage('');
+    }, 3000);
+
+    return () => window.clearTimeout(timerId);
+  }, [errorMessage]);
+
+  const getVisibleTodos = () => {
+    switch (filter) {
+      case FILTER.active:
+        return todos.filter(todo => !todo.completed);
+
+      case FILTER.completed:
+        return todos.filter(todo => todo.completed);
+
+      default:
+        return todos;
+    }
+  };
+
+  const visibleTodos = getVisibleTodos();
+
+  const handleDelete = (todoId: number) => {
+    setIsDeleting(true);
+    setDeletingTodoIds(ids => [...ids, todoId]);
+
+    return deleteTodo(todoId)
+      .then(() => {
+        setTodos(currentTodos =>
+          currentTodos.filter(todo => todo.id !== todoId),
+        );
+      })
+      .catch(() => {
+        setErrorMessage(ErrorMessage.DELETE_TODO);
+        throw new Error();
+      })
+      .finally(() => {
+        setIsDeleting(false);
+        setDeletingTodoIds(ids => ids.filter(id => id !== todoId));
+      });
+  };
+
+  const updateTodo = (todo: Todo, newTodo: Todo) => {
+    setUpdatingTodoIds(ids => [...ids, todo.id]);
+
+    return patchTodo(newTodo)
+      .then(() => {
+        setTodos(current =>
+          current.map(item => (item.id === todo.id ? newTodo : item)),
+        );
+      })
+      .catch(() => {
+        setErrorMessage(ErrorMessage.UPDATE_TODO);
+        throw new Error();
+      })
+      .finally(() => {
+        setUpdatingTodoIds(ids => ids.filter(id => id !== todo.id));
+      });
+  };
+
+  const handleChecked = (todo: Todo) => {
+    updateTodo(todo, {
+      ...todo,
+      completed: !todo.completed,
+    });
+  };
+
+  const handleToggleAll = (posts: Todo[]) => {
+    const areAllTodosCompleted = posts.every(t => t.completed);
+
+    if (!areAllTodosCompleted) {
+      posts.forEach(t => {
+        if (!t.completed) {
+          handleChecked(t);
+        }
+      });
+    } else {
+      posts.forEach(t => {
+        if (t.completed) {
+          handleChecked(t);
+        }
+      });
+    }
+  };
+
+  const handleHideErrorMessage = () => {
+    setErrorMessage('');
+  };
+
   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">
+        <NewTodoList
+          todos={todos}
+          title={title}
+          isLoading={isLoading}
+          isDeleting={isDeleting}
+          setTitle={setTitle}
+          setTodos={setTodos}
+          setErrorMessage={setErrorMessage}
+          setIsLoading={setIsLoading}
+          setTempTodo={setTempTodo}
+          onToggleAll={handleToggleAll}
+        />
+
+        <section className="todoapp__main" data-cy="TodoList">
+          <TodoList
+            todos={visibleTodos}
+            deletingTodoIds={deletingTodoIds}
+            updatingTodoIds={updatingTodoIds}
+            setErrorMessage={setErrorMessage}
+            updateTodo={updateTodo}
+            onDelete={handleDelete}
+            onChecked={handleChecked}
+          />
+          {tempTodo && <TodoItem todo={tempTodo} isLoading />}
+        </section>
+
+        {isTodosNotEmpty && (
+          <Footer
+            todos={todos}
+            filter={filter}
+            setFilter={setFilter}
+            onDelete={handleDelete}
+          />
+        )}
+      </div>
+
+      <ErrorNotification
+        errorMessage={errorMessage}
+        onHide={handleHideErrorMessage}
+      />
+    </div>
   );
 };
diff --git a/src/api/filter.ts b/src/api/filter.ts
new file mode 100644
index 0000000000..6d8a2e127d
--- /dev/null
+++ b/src/api/filter.ts
@@ -0,0 +1,5 @@
+export const FILTER = {
+  all: 'all',
+  completed: 'completed',
+  active: 'active',
+} as const;
diff --git a/src/api/todos.ts b/src/api/todos.ts
new file mode 100644
index 0000000000..569a7a54ea
--- /dev/null
+++ b/src/api/todos.ts
@@ -0,0 +1,21 @@
+import { Todo } from '../types/Todo';
+import { client } from '../utils/fetchClient';
+
+export const USER_ID = 4198;
+
+export const getTodos = () => {
+  return client.get<Todo[]>(`/todos?userId=${USER_ID}`);
+};
+
+// Add more methods here
+export const patchTodo = ({ id, ...todoData }: Todo) => {
+  return client.patch<Todo>(`/todos/${id}`, todoData);
+};
+
+export const postTodo = ({ title, userId, completed }: Omit<Todo, 'id'>) => {
+  return client.post<Todo>('/todos', { title, userId, completed });
+};
+
+export const deleteTodo = (todoId: number) => {
+  return client.delete(`/todos/${todoId}`);
+};
diff --git a/src/components/ErrorNotification.tsx b/src/components/ErrorNotification.tsx
new file mode 100644
index 0000000000..e5852dede5
--- /dev/null
+++ b/src/components/ErrorNotification.tsx
@@ -0,0 +1,33 @@
+import React from 'react';
+import classNames from 'classnames';
+
+type Props = {
+  errorMessage: string;
+  onHide: () => void;
+};
+
+export const ErrorNotification: React.FC<Props> = ({
+  errorMessage,
+  onHide,
+}) => {
+  return (
+    <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"
+        aria-label="Hide error notification"
+        onClick={onHide}
+      />
+      {errorMessage}
+    </div>
+  );
+};
diff --git a/src/components/Footer.tsx b/src/components/Footer.tsx
new file mode 100644
index 0000000000..f13bdf8d43
--- /dev/null
+++ b/src/components/Footer.tsx
@@ -0,0 +1,80 @@
+import React from 'react';
+import { Todo } from '../types/Todo';
+import { Filter } from '../types/Filter';
+import classNames from 'classnames';
+import { FILTER } from '../api/filter';
+
+type Props = {
+  todos: Todo[];
+  filter: Filter;
+  setFilter: (filter: Filter) => void;
+  onDelete: (todoId: number) => void;
+};
+
+export const Footer: React.FC<Props> = ({
+  todos,
+  filter,
+  setFilter,
+  onDelete,
+}) => {
+  const activeTodos = todos.filter(todo => !todo.completed);
+  const completedTodos = todos.filter(todo => todo.completed);
+  const isCompletedTodos = todos.some(todo => todo.completed);
+
+  return (
+    <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: filter === FILTER.all,
+          })}
+          data-cy="FilterLinkAll"
+          onClick={() => setFilter(FILTER.all)}
+        >
+          All
+        </a>
+
+        <a
+          href="#/active"
+          className={classNames('filter__link', {
+            selected: filter === FILTER.active,
+          })}
+          data-cy="FilterLinkActive"
+          onClick={() => setFilter(FILTER.active)}
+        >
+          Active
+        </a>
+
+        <a
+          href="#/completed"
+          className={classNames('filter__link', {
+            selected: filter === FILTER.completed,
+          })}
+          data-cy="FilterLinkCompleted"
+          onClick={() => setFilter(FILTER.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"
+        disabled={!isCompletedTodos}
+        onClick={() => {
+          completedTodos.map(todo => onDelete(todo.id));
+        }}
+      >
+        Clear completed
+      </button>
+    </footer>
+  );
+};
diff --git a/src/components/NewTodoList.tsx b/src/components/NewTodoList.tsx
new file mode 100644
index 0000000000..a0deb35cc0
--- /dev/null
+++ b/src/components/NewTodoList.tsx
@@ -0,0 +1,107 @@
+import classNames from 'classnames';
+import React, { useEffect, useRef, useState } from 'react';
+import { Todo } from '../types/Todo';
+import { postTodo, USER_ID } from '../api/todos';
+import { ErrorMessage } from '../types/ErrorMessage';
+
+type Props = {
+  todos: Todo[];
+  title: string;
+  isLoading?: boolean;
+  isDeleting: boolean;
+  setTempTodo: (t: Todo | null) => void;
+  setTitle: (t: string) => void;
+  setTodos: (t: Todo[]) => void;
+  setErrorMessage: (m: string) => void;
+  setIsLoading: (l: boolean) => void;
+  onToggleAll: (todos: Todo[]) => void;
+};
+
+export const NewTodoList: React.FC<Props> = ({
+  todos,
+  title,
+  setTitle,
+  isDeleting,
+  setTodos,
+  setErrorMessage,
+  setIsLoading,
+  setTempTodo,
+  onToggleAll,
+}) => {
+  const [isPosting, setIsPosting] = useState(false);
+  const inputRef = useRef<HTMLInputElement>(null);
+  const allCompleted = todos.length > 0 && todos.every(t => t.completed);
+
+  useEffect(() => {
+    inputRef.current?.focus();
+  }, [isPosting, isDeleting]);
+
+  const handleChange: React.ChangeEventHandler<HTMLInputElement> = event => {
+    setTitle(event.target.value);
+  };
+
+  const handleSubmit: React.FormEventHandler<HTMLFormElement> = event => {
+    event.preventDefault();
+    setIsLoading(true);
+    setIsPosting(true);
+    const trimedTitle = title.trim();
+
+    if (!trimedTitle) {
+      setErrorMessage(ErrorMessage.CHECK_TITLE);
+      setIsLoading(false);
+      setIsPosting(false);
+
+      return;
+    }
+
+    const tempTodo: Todo = {
+      title: trimedTitle,
+      completed: false,
+      userId: USER_ID,
+      id: 0,
+    };
+
+    setTempTodo(tempTodo);
+
+    postTodo(tempTodo)
+      .then(createdTodo => {
+        setTodos([...todos, createdTodo]);
+        setTitle('');
+      })
+      .catch(() => setErrorMessage(ErrorMessage.ADD_TODO))
+      .finally(() => {
+        setIsLoading(false);
+        setIsPosting(false);
+        setTempTodo(null);
+        inputRef.current?.focus();
+      });
+  };
+
+  return (
+    <header className="todoapp__header">
+      {todos.length > 0 && (
+        <button
+          type="button"
+          className={classNames('todoapp__toggle-all', {
+            active: allCompleted,
+          })}
+          data-cy="ToggleAllButton"
+          onClick={() => onToggleAll(todos)}
+        />
+      )}
+
+      <form onSubmit={handleSubmit}>
+        <input
+          ref={inputRef}
+          data-cy="NewTodoField"
+          type="text"
+          value={title}
+          className="todoapp__new-todo"
+          placeholder="What needs to be done?"
+          onChange={handleChange}
+          disabled={isPosting}
+        />
+      </form>
+    </header>
+  );
+};
diff --git a/src/components/TodoItem.tsx b/src/components/TodoItem.tsx
new file mode 100644
index 0000000000..29047db9d0
--- /dev/null
+++ b/src/components/TodoItem.tsx
@@ -0,0 +1,136 @@
+import React, { useState } from 'react';
+import { Todo } from '../types/Todo';
+import classNames from 'classnames';
+import { ErrorMessage } from '../types/ErrorMessage';
+
+type Props = {
+  todo: Todo;
+  isLoading?: boolean;
+  updateTodo?: (todo: Todo, newTodo: Todo) => Promise<void>;
+  setErrorMessage?: (error: string) => void;
+  onDelete?: (todoId: number) => Promise<void>;
+  onChecked?: (todo: Todo) => void;
+};
+
+export const TodoItem: React.FC<Props> = ({
+  todo,
+  isLoading,
+  updateTodo,
+  setErrorMessage,
+  onDelete,
+  onChecked,
+}) => {
+  const [isTodoEditing, setIsTodoEditing] = useState(false);
+  const [editTitle, setEditTitle] = useState(todo.title);
+
+  const handleKeyUp = (event: React.KeyboardEvent<HTMLInputElement>) => {
+    if (event.key === 'Escape') {
+      setIsTodoEditing(false);
+      setEditTitle(todo.title);
+    }
+  };
+
+  const handleChange: React.ChangeEventHandler<HTMLInputElement> = event => {
+    setEditTitle(event.target.value);
+  };
+
+  const handleEditTodo = (t: Todo) => {
+    const normalizedTitle = editTitle.trim();
+
+    if (todo.title === normalizedTitle) {
+      setIsTodoEditing(false);
+
+      return;
+    }
+
+    if (normalizedTitle === '') {
+      onDelete?.(todo.id)
+        .then(() => {
+          setIsTodoEditing(false);
+        })
+        .catch(() => {});
+
+      return;
+    }
+
+    updateTodo?.(t, {
+      ...t,
+      title: normalizedTitle,
+    })?.then(() => {
+      setIsTodoEditing(false);
+    });
+  };
+
+  const handleSubmit: React.FormEventHandler<HTMLFormElement> = event => {
+    event.preventDefault();
+
+    try {
+      handleEditTodo(todo);
+    } catch (error) {
+      setErrorMessage?.(ErrorMessage.UPDATE_TODO);
+    }
+  };
+
+  return (
+    <div
+      data-cy="Todo"
+      className={classNames('todo', { completed: todo.completed })}
+    >
+      <label className="todo__status-label" htmlFor={`todo-${todo.id}`}>
+        <input
+          id={`todo-${todo.id}`}
+          data-cy="TodoStatus"
+          type="checkbox"
+          className="todo__status"
+          checked={todo.completed}
+          aria-label="Toggle todo status"
+          onChange={() => onChecked?.(todo)}
+        />
+      </label>
+
+      {!isTodoEditing ? (
+        <>
+          <span
+            data-cy="TodoTitle"
+            className="todo__title"
+            onDoubleClick={() => setIsTodoEditing(true)}
+          >
+            {todo.title}
+          </span>
+
+          <button
+            type="button"
+            className="todo__remove"
+            data-cy="TodoDelete"
+            onClick={() => onDelete?.(todo.id)}
+          >
+            ×
+          </button>
+        </>
+      ) : (
+        <form onSubmit={handleSubmit} onBlur={handleSubmit}>
+          <input
+            data-cy="TodoTitleField"
+            type="text"
+            className="todo__title-field"
+            placeholder="Empty todo will be deleted"
+            value={editTitle}
+            onChange={handleChange}
+            onKeyUp={handleKeyUp}
+            autoFocus
+          />
+        </form>
+      )}
+
+      <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..5fbaa2016f
--- /dev/null
+++ b/src/components/TodoList.tsx
@@ -0,0 +1,44 @@
+import React from 'react';
+import { Todo } from '../types/Todo';
+import { TodoItem } from './TodoItem';
+
+type Props = {
+  todos: Todo[];
+  deletingTodoIds: number[] | null;
+  updatingTodoIds: number[] | null;
+  setErrorMessage?: (error: string) => void;
+  updateTodo?: (todo: Todo, newTodo: Todo) => Promise<void>;
+  onDelete?: (todoId: number) => Promise<void>;
+  onChecked?: (todo: Todo) => void;
+};
+
+export const TodoList: React.FC<Props> = ({
+  todos,
+  deletingTodoIds,
+  updatingTodoIds,
+  setErrorMessage,
+  updateTodo,
+  onDelete,
+  onChecked,
+}) => {
+  return (
+    <>
+      {todos.map(todo => {
+        return (
+          <TodoItem
+            todo={todo}
+            key={todo.id}
+            isLoading={
+              deletingTodoIds?.includes(todo.id) ||
+              updatingTodoIds?.includes(todo.id)
+            }
+            setErrorMessage={setErrorMessage}
+            updateTodo={updateTodo}
+            onDelete={onDelete}
+            onChecked={onChecked}
+          />
+        );
+      })}
+    </>
+  );
+};
diff --git a/src/constants/filter.ts b/src/constants/filter.ts
new file mode 100644
index 0000000000..bfbedd26c0
--- /dev/null
+++ b/src/constants/filter.ts
@@ -0,0 +1,7 @@
+export const FILTERS = {
+  all: 'all',
+  active: 'active',
+  completed: 'completed',
+} as const;
+
+export type Filter = (typeof FILTERS)[keyof typeof FILTERS];
diff --git a/src/types/ErrorMessage.ts b/src/types/ErrorMessage.ts
new file mode 100644
index 0000000000..8b042451cb
--- /dev/null
+++ b/src/types/ErrorMessage.ts
@@ -0,0 +1,7 @@
+export enum ErrorMessage {
+  LOAD_TODO = 'Unable to load todos',
+  ADD_TODO = 'Unable to add a todo',
+  UPDATE_TODO = 'Unable to update a todo',
+  DELETE_TODO = 'Unable to delete a todo',
+  CHECK_TITLE = 'Title should not be empty',
+}
diff --git a/src/types/Filter.ts b/src/types/Filter.ts
new file mode 100644
index 0000000000..f04ce41bfe
--- /dev/null
+++ b/src/types/Filter.ts
@@ -0,0 +1 @@
+export type Filter = 'all' | 'completed' | 'active';
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'),
+};