diff --git a/src/App.tsx b/src/App.tsx
index a399287bd..87f25a1c2 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -1,157 +1,13 @@
-/* eslint-disable jsx-a11y/control-has-associated-label */
 import React from 'react';
+import { Content } from './components/Content';
+import { TodosProvider } from './context/TodosContex';
 
 export const App: React.FC = () => {
   return (
     <div className="todoapp">
-      <h1 className="todoapp__title">todos</h1>
-
-      <div className="todoapp__content">
-        <header className="todoapp__header">
-          {/* this button should have `active` class only if all todos are completed */}
-          <button
-            type="button"
-            className="todoapp__toggle-all active"
-            data-cy="ToggleAllButton"
-          />
-
-          {/* Add a todo on form submit */}
-          <form>
-            <input
-              data-cy="NewTodoField"
-              type="text"
-              className="todoapp__new-todo"
-              placeholder="What needs to be done?"
-            />
-          </form>
-        </header>
-
-        <section className="todoapp__main" data-cy="TodoList">
-          {/* This is a completed todo */}
-          <div data-cy="Todo" className="todo completed">
-            <label className="todo__status-label">
-              <input
-                data-cy="TodoStatus"
-                type="checkbox"
-                className="todo__status"
-                checked
-              />
-            </label>
-
-            <span data-cy="TodoTitle" className="todo__title">
-              Completed Todo
-            </span>
-
-            {/* Remove button appears only on hover */}
-            <button type="button" className="todo__remove" data-cy="TodoDelete">
-              ×
-            </button>
-          </div>
-
-          {/* This todo is an active todo */}
-          <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">
-              Not Completed Todo
-            </span>
-
-            <button type="button" className="todo__remove" data-cy="TodoDelete">
-              ×
-            </button>
-          </div>
-
-          {/* This todo is being edited */}
-          <div data-cy="Todo" className="todo">
-            <label className="todo__status-label">
-              <input
-                data-cy="TodoStatus"
-                type="checkbox"
-                className="todo__status"
-              />
-            </label>
-
-            {/* This form is shown instead of the title and remove button */}
-            <form>
-              <input
-                data-cy="TodoTitleField"
-                type="text"
-                className="todo__title-field"
-                placeholder="Empty todo will be deleted"
-                value="Todo is being edited now"
-              />
-            </form>
-          </div>
-
-          {/* This todo is in loadind state */}
-          <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>
-          </div>
-        </section>
-
-        {/* Hide the footer if there are no todos */}
-        <footer className="todoapp__footer" data-cy="Footer">
-          <span className="todo-count" data-cy="TodosCounter">
-            3 items left
-          </span>
-
-          {/* Active link should have the 'selected' class */}
-          <nav className="filter" data-cy="Filter">
-            <a
-              href="#/"
-              className="filter__link selected"
-              data-cy="FilterLinkAll"
-            >
-              All
-            </a>
-
-            <a
-              href="#/active"
-              className="filter__link"
-              data-cy="FilterLinkActive"
-            >
-              Active
-            </a>
-
-            <a
-              href="#/completed"
-              className="filter__link"
-              data-cy="FilterLinkCompleted"
-            >
-              Completed
-            </a>
-          </nav>
-
-          {/* this button should be disabled if there are no completed todos */}
-          <button
-            type="button"
-            className="todoapp__clear-completed"
-            data-cy="ClearCompletedButton"
-          >
-            Clear completed
-          </button>
-        </footer>
-      </div>
+      <TodosProvider>
+        <Content />
+      </TodosProvider>
     </div>
   );
 };
diff --git a/src/components/Content.tsx b/src/components/Content.tsx
new file mode 100644
index 000000000..86fd338ba
--- /dev/null
+++ b/src/components/Content.tsx
@@ -0,0 +1,46 @@
+import React, { useContext, useEffect, useState } from 'react';
+import { Header } from './Header';
+import { TodoList } from './TodoList';
+import { Footer } from './Footer';
+import { TodosContext } from '../context/TodosContex';
+
+export const Content: React.FC = () => {
+  const { todos, setTodos } = useContext(TodosContext);
+
+  const [visibleTodos, setVisibleTodos] = useState(todos);
+
+  useEffect(() => {
+    localStorage.setItem('todos', JSON.stringify(todos));
+  }, [todos]);
+
+  const savedTodos = localStorage.getItem('todos');
+
+  useEffect(() => {
+    if (savedTodos) {
+      setTodos(JSON.parse(savedTodos));
+    }
+  }, []);
+
+  useEffect(() => {
+    setVisibleTodos(todos);
+  }, [todos]);
+
+  return (
+    <>
+      <h1 className="todoapp__title">todos</h1>
+
+      <div className="todoapp__content">
+        <Header />
+
+        <TodoList visibleTodos={visibleTodos} />
+
+        {todos.length > 0 && (
+          <Footer
+            visibleTodos={visibleTodos}
+            setVisibleTodos={setVisibleTodos}
+          />
+        )}
+      </div>
+    </>
+  );
+};
diff --git a/src/components/Footer.tsx b/src/components/Footer.tsx
new file mode 100644
index 000000000..2405edacd
--- /dev/null
+++ b/src/components/Footer.tsx
@@ -0,0 +1,100 @@
+import React, { useCallback, useContext, useEffect, useState } from 'react';
+import { Filter } from '../types/Filter';
+import classNames from 'classnames';
+import { TodosContext } from '../context/TodosContex';
+import { Todo } from '../types/Todo';
+
+type Props = {
+  visibleTodos: Todo[];
+  setVisibleTodos: (vilteredTodos: Todo[]) => void;
+};
+
+export const Footer: React.FC<Props> = ({ visibleTodos, setVisibleTodos }) => {
+  const { todos, setTodos } = useContext(TodosContext);
+
+  const [selectedFilter, setSelectedFilter] = useState<Filter>(Filter.All);
+
+  const findFilterKey = (value: string): string | undefined => {
+    return Object.keys(Filter).find(
+      key => Filter[key as keyof typeof Filter] === value,
+    );
+  };
+
+  const todosCount = useCallback(
+    (type: Filter.Active | Filter.Completed) => {
+      const value = type === Filter.Active ? false : true;
+
+      return todos.filter(todo => todo.completed === value).length;
+    },
+    [todos],
+  );
+
+  const filterFunction = (filter: Filter) => {
+    switch (filter) {
+      case Filter.All:
+        setVisibleTodos(todos);
+        break;
+
+      case Filter.Active:
+        setVisibleTodos(todos.filter(todo => !todo.completed));
+        break;
+
+      case Filter.Completed:
+        setVisibleTodos(todos.filter(todo => todo.completed));
+        break;
+
+      default:
+        setTodos(todos);
+    }
+  };
+
+  const clearFunction = () => {
+    setTodos(todos.filter(t => !t.completed));
+  };
+
+  const setFilter = (filter: Filter) => {
+    setSelectedFilter(filter);
+
+    filterFunction(filter);
+  };
+
+  useEffect(() => {
+    if (selectedFilter) {
+      filterFunction(selectedFilter);
+    }
+  }, [visibleTodos]);
+
+  return (
+    <footer className="todoapp__footer" data-cy="Footer">
+      <span className="todo-count" data-cy="TodosCounter">
+        {todosCount(Filter.Active)} items left
+      </span>
+
+      <nav className="filter" data-cy="Filter">
+        {Object.values(Filter).map(filter => (
+          <a
+            key={filter}
+            href={`#/${filter}`}
+            className={classNames('filter__link', {
+              selected: selectedFilter === filter,
+            })}
+            onClick={() => setFilter(filter)}
+            data-cy={`FilterLink${findFilterKey(filter)}`}
+          >
+            {findFilterKey(filter)}
+          </a>
+        ))}
+      </nav>
+
+      <button
+        type="button"
+        className="todoapp__clear-completed"
+        data-cy="ClearCompletedButton"
+        disabled={todosCount(Filter.Completed) === 0}
+        onClick={() => clearFunction()}
+      >
+        Clear completed
+      </button>
+    </footer>
+  );
+};
diff --git a/src/components/Header.tsx b/src/components/Header.tsx
new file mode 100644
index 000000000..f6a26f1f4
--- /dev/null
+++ b/src/components/Header.tsx
@@ -0,0 +1,83 @@
+import React, { useContext, useEffect, useRef, useState } from 'react';
+import { TodosContext } from '../context/TodosContex';
+import classNames from 'classnames';
+import { Todo } from '../types/Todo';
+
+export const Header: React.FC = () => {
+  const { todos, setTodos } = useContext(TodosContext);
+
+  const [title, setTitle] = useState('');
+
+  const inputRef = useRef<HTMLInputElement>(null);
+
+  useEffect(() => {
+    if (inputRef.current) {
+      inputRef.current.focus();
+    }
+  }, [todos]);
+
+  const checkActiveTodos = (): boolean => {
+    if (todos.length > 0) {
+      return todos.every(todo => todo.completed);
+    }
+
+    return false;
+  };
+
+  const onSubmit = (event: React.FormEvent<HTMLFormElement>) => {
+    event.preventDefault();
+
+    const normalizedTitle = title.trim();
+
+    if (!normalizedTitle) {
+      return;
+    }
+
+    const newTodo: Todo = {
+      id: +new Date(),
+      title: normalizedTitle,
+      completed: false,
+    };
+
+    setTodos([...todos, newTodo]);
+    setTitle('');
+  };
+
+  const toggleAll = () => {
+    const allCompleted = checkActiveTodos();
+
+    const toggledTodos = todos.map(todo => ({
+      ...todo,
+      completed: allCompleted ? false : true,
+    }));
+
+    setTodos(toggledTodos);
+  };
+
+  return (
+    <header className="todoapp__header">
+      {todos.length > 0 && (
+        <button
+          type="button"
+          className={classNames('todoapp__toggle-all', {
+            active: checkActiveTodos(),
+          })}
+          onClick={toggleAll}
+          data-cy="ToggleAllButton"
+        />
+      )}
+
+      <form onSubmit={event => onSubmit(event)}>
+        <input
+          data-cy="NewTodoField"
+          ref={inputRef}
+          value={title}
+          onChange={event => setTitle(event.target.value)}
+          type="text"
+          className="todoapp__new-todo"
+          placeholder="What needs to be done?"
+        />
+      </form>
+    </header>
+  );
+};
diff --git a/src/components/TodoItem.tsx b/src/components/TodoItem.tsx
new file mode 100644
index 000000000..57027a63c
--- /dev/null
+++ b/src/components/TodoItem.tsx
@@ -0,0 +1,111 @@
+/* eslint-disable jsx-a11y/label-has-associated-control */
+/* eslint-disable jsx-a11y/control-has-associated-label */
+import React, { useContext, useEffect, useRef, useState } from 'react';
+import { Todo } from '../types/Todo';
+import classNames from 'classnames';
+import { TodosContext } from '../context/TodosContex';
+
+type Props = {
+  todo: Todo;
+};
+
+export const TodoItem: React.FC<Props> = ({ todo }) => {
+  const { todos, setTodos } = useContext(TodosContext);
+
+  const [onEdit, setOnEdit] = useState(false);
+  const [title, setTitle] = useState(todo.title);
+
+  const todoInputRef = useRef<HTMLInputElement>(null);
+
+  useEffect(() => {
+    if (todoInputRef.current) {
+      todoInputRef.current.focus();
+    }
+  }, [onEdit]);
+
+  const handleKeyUp = (event: React.KeyboardEvent<HTMLInputElement>) => {
+    if (event.key === 'Escape') {
+      setOnEdit(false);
+      setTitle(todo.title);
+    }
+  };
+
+  const updateTodo = (updatedTodo: Todo) => {
+    setTodos(todos.map(t => (t.id === updatedTodo.id ? updatedTodo : t)));
+  };
+
+  const onDelete = () => {
+    setTodos(todos.filter(currentTodo => currentTodo.id !== todo.id));
+  };
+
+  const statusChange = () => {
+    updateTodo({ ...todo, completed: !todo.completed });
+  };
+
+  const onSubmit = (event?: React.FormEvent<HTMLFormElement>) => {
+    event?.preventDefault();
+    setOnEdit(false);
+
+    const normalizedTitle = title.trim();
+
+    if (!normalizedTitle) {
+      onDelete();
+
+      return;
+    }
+
+    updateTodo({ ...todo, title: normalizedTitle });
+  };
+
+  return (
+    <>
+      <div
+        data-cy="Todo"
+        onDoubleClick={() => setOnEdit(true)}
+        className={classNames('todo', { completed: todo.completed })}
+      >
+        <label className="todo__status-label" onClick={() => statusChange()}>
+          <input
+            data-cy="TodoStatus"
+            type="checkbox"
+            className="todo__status"
+            checked={todo.completed}
+          />
+        </label>
+
+        {!onEdit ? (
+          <>
+            <span data-cy="TodoTitle" className="todo__title">
+              {todo.title}
+            </span>
+
+            <button
+              type="button"
+              className="todo__remove"
+              onClick={() => onDelete()}
+              data-cy="TodoDelete"
+            >
+              ×
+            </button>
+          </>
+        ) : (
+          <form onSubmit={event => onSubmit(event)}>
+            <input
+              data-cy="TodoTitleField"
+              ref={todoInputRef}
+              value={title}
+              onChange={event => {
+                setTitle(event.target.value);
+              }}
+              onBlur={() => onSubmit()}
+              onKeyUp={event => handleKeyUp(event)}
+              type="text"
+              className="todo__title-field"
+              placeholder="Empty todo will be deleted"
+            />
+          </form>
+        )}
+      </div>
+    </>
+  );
+};
diff --git a/src/components/TodoList.tsx b/src/components/TodoList.tsx
new file mode 100644
index 000000000..036cde44c
--- /dev/null
+++ b/src/components/TodoList.tsx
@@ -0,0 +1,16 @@
+import { TodoItem } from './TodoItem';
+import { Todo } from '../types/Todo';
+
+type Props = {
+  visibleTodos: Todo[];
+};
+
+export const TodoList: React.FC<Props> = ({ visibleTodos }) => {
+  return (
+    <section className="todoapp__main" data-cy="TodoList">
+      {visibleTodos.map(todo => (
+        <TodoItem todo={todo} key={todo.id} />
+      ))}
+    </section>
+  );
+};
diff --git a/src/context/TodosContex.tsx b/src/context/TodosContex.tsx
new file mode 100644
index 000000000..71047fdd4
--- /dev/null
+++ b/src/context/TodosContex.tsx
@@ -0,0 +1,32 @@
+import React, { createContext, useMemo, useState } from 'react';
+import { Todo } from '../types/Todo';
+
+type ContextProps = {
+  todos: Todo[];
+  setTodos: (todos: Todo[]) => void;
+};
+
+export const TodosContext = createContext<ContextProps>({
+  todos: [],
+  setTodos: () => {},
+});
+
+type Props = {
+  children: React.ReactNode;
+};
+
+export const TodosProvider: React.FC<Props> = ({ children }) => {
+  const [todos, setTodos] = useState<Todo[]>([]);
+
+  const value = useMemo(
+    () => ({
+      todos,
+      setTodos,
+    }),
+    [todos],
+  );
+
+  return (
+    <TodosContext.Provider value={value}>{children}</TodosContext.Provider>
+  );
+};
diff --git a/src/index.tsx b/src/index.tsx
index a9689cb38..8e38aa180 100644
--- a/src/index.tsx
+++ b/src/index.tsx
@@ -1,8 +1,9 @@
 import { createRoot } from 'react-dom/client';
 
-import './styles/index.css';
-import './styles/todo-list.css';
-import './styles/filters.css';
+import './styles/index.scss';
+import './styles/todoapp.scss';
+import './styles/filter.scss';
+import './styles/todo.scss';
 
 import { App } from './App';
 
diff --git a/src/styles/todoapp.scss b/src/styles/todoapp.scss
index e289a9458..2f9ee48e9 100644
--- a/src/styles/todoapp.scss
+++ b/src/styles/todoapp.scss
@@ -1,3 +1,7 @@
+* {
+  box-sizing: border-box;
+}
+
 .todoapp {
   font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
   font-size: 24px;
diff --git a/src/types/Filter.ts b/src/types/Filter.ts
new file mode 100644
index 000000000..174408fd6
--- /dev/null
+++ b/src/types/Filter.ts
@@ -0,0 +1,5 @@
+export enum Filter {
+  All = 'all',
+  Active = 'active',
+  Completed = 'completed',
+}
diff --git a/src/types/FuncType.ts b/src/types/FuncType.ts
new file mode 100644
index 000000000..74f3a0522
--- /dev/null
+++ b/src/types/FuncType.ts
@@ -0,0 +1,4 @@
+export enum FuncType {
+  update = 'update',
+  delete = 'delete',
+}
diff --git a/src/types/Todo.ts b/src/types/Todo.ts
new file mode 100644
index 000000000..f9e06b381
--- /dev/null
+++ b/src/types/Todo.ts
@@ -0,0 +1,5 @@
+export interface Todo {
+  id: number;
+  title: string;
+  completed: boolean;
+}