diff --git a/README.md b/README.md
index c7bfa3dd36..ecfe5c8aaa 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://Luk2asz.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..71feb32405 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -1,24 +1,161 @@
-/* eslint-disable max-len */
+/* eslint-disable @typescript-eslint/no-unused-expressions */
 /* eslint-disable jsx-a11y/control-has-associated-label */
-import React from 'react';
+import React, { useMemo, useState } from 'react';
 import { UserWarning } from './UserWarning';
+import { Todo } from './types/Todo';
+import { SortBy } from './types/SortBy';
+import { deleteTodo, updateTodo } from './api/todos';
+import { Todos } from './components/Todos';
+import { useGetTodos } from './hooks';
+import { Errors } from './types';
+import { Footer } from './components/Footer';
+import { Header } from './components/Header';
 
-const USER_ID = 0;
+const USER_ID = 11361;
 
 export const App: React.FC = () => {
+  const [userId] = useState(USER_ID);
+  const [sortBy, setSortBy] = useState<SortBy>(SortBy.all);
+  const [selectedTodo, setSelectedTodo] = useState<number[]>([]);
+  const [tempTodo, setTempTodo] = useState<Todo | null>(null);
+  const [isDeleteUpdateTodo, setIsDeleteUpdateTodo] = useState<boolean>(false);
+  const [makeAnyChange, setMakeAnyChange] = useState<boolean>(false);
+  const {
+    isLoading,
+    todos,
+    errorMessage,
+    handleError,
+  } = useGetTodos(USER_ID, makeAnyChange);
+
+  const handleSelectedTodo = (value: number[]) => {
+    setSelectedTodo(value);
+  };
+
+  const handleSetTempTodo = (value:Todo | null) => {
+    setTempTodo(value);
+  };
+
+  const handleSetMakeAnyChange = (value:boolean) => {
+    setMakeAnyChange(value);
+  };
+
+  const handleDeleteUptadeTodo = (value: boolean) => {
+    setIsDeleteUpdateTodo(value);
+  };
+
+  const todosNotCompleted = useMemo(() => {
+    return todos.filter(todo => todo.completed === false).length;
+  }, [todos]);
+
+  const deleteOneTodo = async (todoId: number) => {
+    setSelectedTodo(prevSelectedTodo => [...prevSelectedTodo, todoId]);
+    setIsDeleteUpdateTodo(true);
+    try {
+      await deleteTodo(USER_ID, todoId);
+    } catch (error) {
+      handleError(Errors.delete);
+    } finally {
+      setSelectedTodo([]);
+    }
+
+    setIsDeleteUpdateTodo(false);
+    setMakeAnyChange(!makeAnyChange);
+  };
+
+  const updateCheckTodo = async (todoId: number) => {
+    setSelectedTodo(prevSelectedTodo => [...prevSelectedTodo, todoId]);
+    setIsDeleteUpdateTodo(true);
+    let updatedTodo: Todo | undefined = todos.find(todo => todo.id === todoId);
+
+    updatedTodo
+      ? updatedTodo = { ...updatedTodo, completed: !updatedTodo.completed }
+      : null;
+
+    try {
+      await updateTodo(USER_ID, updatedTodo, todoId);
+    } catch (error) {
+      handleError(Errors.update);
+    } finally {
+      setSelectedTodo([]);
+    }
+
+    setIsDeleteUpdateTodo(true);
+    setMakeAnyChange(!makeAnyChange);
+  };
+
+  const handleUpdateCheckTodo = (value: number) => updateCheckTodo(value);
+  const handleDeleteTodo = (value: number) => deleteOneTodo(value);
+
+  const handleSetSortBy = (value: SortBy) => {
+    setSortBy(value);
+  };
+
   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
+          todosNotCompleted={todosNotCompleted}
+          todos={todos}
+          handleUpdateCheckTodo={handleUpdateCheckTodo}
+          handleSelectedTodo={handleSelectedTodo}
+          handleError={handleError}
+          handleSetTempTodo={handleSetTempTodo}
+          userId={userId}
+          handleSetMakeAnyChange={handleSetMakeAnyChange}
+          makeAnyChange={makeAnyChange}
+          selectedTodo={selectedTodo}
+        />
+
+        <Todos
+          todos={todos}
+          tempTodo={tempTodo}
+          sortBy={sortBy}
+          handleDeleteTodo={handleDeleteTodo}
+          isLoading={isLoading}
+          selectedTodo={selectedTodo}
+          handleUpdateCheckTodo={handleUpdateCheckTodo}
+          handleSelectedTodo={handleSelectedTodo}
+          handleError={handleError}
+          userId={userId}
+          handleSetMakeAnyChange={handleSetMakeAnyChange}
+          makeAnyChange={makeAnyChange}
+          isDeleteUpdateTodo={isDeleteUpdateTodo}
+          handleDeleteUptadeTodo={handleDeleteUptadeTodo}
+        />
+
+        {todos.length > 0 && (
+          <Footer
+            todosNotCompleted={todosNotCompleted}
+            handleSetSortBy={handleSetSortBy}
+            sortBy={sortBy}
+            todos={todos}
+            handleDeleteTodo={handleDeleteTodo}
+            handleSelectedTodo={handleSelectedTodo}
+            selectedTodo={selectedTodo}
+          />
+        )}
+
+      </div>
+
+      <div
+        className={errorMessage
+          ? 'notification is-danger is-light has-text-weight-normal'
+          : 'notification is-danger is-light has-text-weight-normal hidden'}
+      >
+        <button
+          type="button"
+          className="delete"
+          onClick={() => handleError(Errors.noError)}
+        />
+
+        {errorMessage}
+      </div>
+    </div>
   );
 };
diff --git a/src/api/todos.ts b/src/api/todos.ts
new file mode 100644
index 0000000000..9bb6897170
--- /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) => client.get<Todo[]>(`/todos?userId=${userId}`);
+
+export const deleteTodo = (userId: number, todoId: number) => {
+  return client.delete(`/todos/${todoId}/?userId=${userId}`);
+};
+
+export const addTodo = (userId: number, data: Todo | null) => {
+  return client.post<Todo[]>(`/todos/?userId=${userId}`, data);
+};
+
+export const updateTodo = (
+  userId: number, data: Todo | undefined, todoId: number,
+) => {
+  return client.patch<Todo[]>(`/todos/${todoId}/?userId=${userId}`, data);
+};
diff --git a/src/components/Footer.tsx b/src/components/Footer.tsx
new file mode 100644
index 0000000000..b97b1e73af
--- /dev/null
+++ b/src/components/Footer.tsx
@@ -0,0 +1,92 @@
+import { SortBy, Todo } from '../types';
+
+type Props = {
+  todosNotCompleted: number,
+  handleSetSortBy: (value:SortBy) => void,
+  sortBy: SortBy,
+  todos: Todo[],
+  handleDeleteTodo: (value: number) => void,
+  handleSelectedTodo: (todoID: number[]) => void;
+  selectedTodo: number[];
+};
+
+export const Footer: React.FC<Props> = ({
+  todosNotCompleted,
+  handleSetSortBy,
+  sortBy,
+  todos,
+  handleDeleteTodo,
+  handleSelectedTodo,
+  selectedTodo,
+}) => {
+  const deleteCompletedtodo = () => {
+    try {
+      todos.forEach(async todo => {
+        if (todo.completed) {
+          handleSelectedTodo([...selectedTodo, todo.id]);
+        }
+      });
+    } finally {
+      handleSelectedTodo([]);
+    }
+
+    todos.forEach(todo => {
+      if (todo.completed) {
+        handleDeleteTodo(todo.id);
+      }
+    });
+  };
+
+  return (
+    <footer className="todoapp__footer">
+      <span className="todo-count">
+        {`${todosNotCompleted} items left`}
+      </span>
+
+      <nav className="filter">
+        <a
+          href="#/"
+          className={sortBy === SortBy.all
+            ? 'filter__link selected'
+            : 'filter__link'}
+          onClick={() => handleSetSortBy(SortBy.all)}
+        >
+          All
+        </a>
+
+        <a
+          href="#/active"
+          className={sortBy === SortBy.active
+            ? 'filter__link selected'
+            : 'filter__link'}
+          onClick={() => handleSetSortBy(SortBy.active)}
+        >
+          Active
+        </a>
+
+        <a
+          href="#/completed"
+          className={sortBy === SortBy.completed
+            ? 'filter__link selected'
+            : 'filter__link'}
+          onClick={() => handleSetSortBy(SortBy.completed)}
+        >
+          Completed
+        </a>
+      </nav>
+
+      <button
+        type="button"
+        data-cy="ClearCompletedButton"
+        className="todoapp__clear-completed"
+        disabled={todosNotCompleted === todos.length}
+        onClick={() => {
+          deleteCompletedtodo();
+        }}
+      >
+        Clear completed
+      </button>
+
+    </footer>
+  );
+};
diff --git a/src/components/Header.tsx b/src/components/Header.tsx
new file mode 100644
index 0000000000..e4cebe2fa3
--- /dev/null
+++ b/src/components/Header.tsx
@@ -0,0 +1,128 @@
+/* eslint-disable consistent-return */
+/* eslint-disable jsx-a11y/control-has-associated-label */
+import classNames from 'classnames';
+import { FormEvent, useState } from 'react';
+import { Errors, Todo } from '../types';
+import { addTodo } from '../api/todos';
+
+type Props = {
+  todosNotCompleted: number,
+  todos: Todo[];
+  handleUpdateCheckTodo: (value: number) => void;
+  handleSelectedTodo: (todoID: number[]) => void;
+  handleError: (value:Errors) => void;
+  handleSetTempTodo: (value:Todo | null) => void;
+  userId: number,
+  handleSetMakeAnyChange: (value: boolean) => void;
+  makeAnyChange: boolean,
+  selectedTodo: number[],
+};
+
+export const Header: React.FC<Props> = ({
+  todosNotCompleted,
+  todos,
+  handleUpdateCheckTodo,
+  handleSelectedTodo,
+  handleError,
+  handleSetTempTodo,
+  userId,
+  handleSetMakeAnyChange,
+  makeAnyChange,
+  selectedTodo,
+}) => {
+  const [inputValue, setInputValue] = useState<string>('');
+  const [isLoadingTodo, setIsLoadingTodo] = useState(false);
+  const buttonAllCompleted = (value: number) => classNames(
+    'todoapp__toggle-all',
+    { active: value === 0 },
+  );
+
+  const updateCheckAllTodo = () => {
+    try {
+      if (todosNotCompleted === 0) {
+        todos.forEach(todo => handleSelectedTodo([...selectedTodo, todo.id]));
+      } else {
+        todos.forEach(todo => {
+          if (todo.completed === false) {
+            handleSelectedTodo([...selectedTodo, todo.id]);
+          }
+        });
+      }
+    } finally {
+      handleSelectedTodo([]);
+    }
+
+    if (todosNotCompleted === 0) {
+      todos.forEach(todo => handleUpdateCheckTodo(todo.id));
+    } else {
+      todos.forEach(todo => {
+        if (todo.completed === false) {
+          handleUpdateCheckTodo(todo.id);
+        }
+      });
+    }
+  };
+
+  const handleAddTodo = async (
+    event: FormEvent<HTMLFormElement> & {
+      target: {
+        todoAdd: {
+          value:string;
+        };
+      };
+    },
+  ) => {
+    event.preventDefault();
+    if (!inputValue.trim()) {
+      return handleError(Errors.emptyTitle);
+    }
+
+    setIsLoadingTodo(true);
+
+    handleSetTempTodo({
+      id: 0,
+      userId: 11361,
+      title: inputValue,
+      completed: false,
+    });
+
+    try {
+      await addTodo(userId, {
+        id: 0,
+        userId: 11361,
+        title: inputValue,
+        completed: false,
+      });
+    } catch (error) {
+      handleError(Errors.add);
+    }
+
+    setIsLoadingTodo(false);
+    handleSetTempTodo(null);
+    setInputValue('');
+    handleSetMakeAnyChange(!makeAnyChange);
+  };
+
+  return (
+    <header className="todoapp__header">
+      <button
+        type="button"
+        className={buttonAllCompleted(todosNotCompleted)}
+        onClick={() => {
+          updateCheckAllTodo();
+        }}
+      />
+
+      <form onSubmit={handleAddTodo}>
+        <input
+          type="text"
+          className="todoapp__new-todo"
+          placeholder="What needs to be done?"
+          value={inputValue}
+          onChange={(e) => setInputValue(e.target.value)}
+          disabled={isLoadingTodo}
+        />
+      </form>
+    </header>
+  );
+};
diff --git a/src/components/TempTodo.tsx b/src/components/TempTodo.tsx
new file mode 100644
index 0000000000..53535b1561
--- /dev/null
+++ b/src/components/TempTodo.tsx
@@ -0,0 +1,39 @@
+import { Todo } from '../types';
+
+type Props = {
+  tempTodo: Todo,
+  handleDeleteTodo: (value: number) => void,
+};
+
+export const TempTodo: React.FC<Props> = ({ tempTodo, handleDeleteTodo }) => (
+  <li
+    className="todo"
+  >
+    <label className="todo__status-label">
+      <input
+        type="checkbox"
+        className="todo__status"
+        checked={tempTodo.completed}
+      />
+    </label>
+
+    <span className="todo__title">
+      {tempTodo.title}
+    </span>
+
+    <button
+      type="button"
+      className="todo__remove"
+      onClick={() => handleDeleteTodo(tempTodo.id)}
+    >
+      ×
+    </button>
+
+    <div
+      className="modal overlay is-active"
+    >
+      <div className="modal-background has-background-white-ter" />
+      <div className="loader" />
+    </div>
+  </li>
+);
diff --git a/src/components/Todos.tsx b/src/components/Todos.tsx
new file mode 100644
index 0000000000..fb09078ba9
--- /dev/null
+++ b/src/components/Todos.tsx
@@ -0,0 +1,195 @@
+/* eslint-disable @typescript-eslint/no-unused-expressions */
+/* eslint-disable no-mixed-operators */
+import {
+  useEffect, useMemo, useRef, useState,
+} from 'react';
+import { Errors, SortBy, Todo } from '../types';
+import { deleteTodo, updateTodo } from '../api/todos';
+import { TempTodo } from './TempTodo';
+
+type Props = {
+  todos: Todo[],
+  tempTodo: Todo | null,
+  sortBy: SortBy,
+  handleDeleteTodo: (value: number) => void,
+  isLoading: boolean,
+  selectedTodo: number[]
+  handleUpdateCheckTodo: (value: number) => void;
+  handleSelectedTodo: (todoID: number[]) => void;
+  handleError: (value: Errors) => void;
+  userId: number,
+  handleSetMakeAnyChange: (value: boolean) => void;
+  makeAnyChange: boolean,
+  isDeleteUpdateTodo: boolean
+  handleDeleteUptadeTodo: (value: boolean) => void;
+};
+
+export const Todos: React.FC<Props> = ({
+  todos,
+  tempTodo,
+  sortBy,
+  handleDeleteTodo,
+  isLoading,
+  selectedTodo,
+  handleUpdateCheckTodo,
+  handleSelectedTodo,
+  handleError,
+  userId,
+  handleSetMakeAnyChange,
+  makeAnyChange,
+  isDeleteUpdateTodo,
+  handleDeleteUptadeTodo,
+}) => {
+  const [isTodoEdit, setIsTodoEdit] = useState<number | null>(null);
+  const [inputValue, setInputValue] = useState<string>('');
+  const filteredTodos = useMemo(() => {
+    if (sortBy === SortBy.all) {
+      return todos;
+    }
+
+    const isCompleted = sortBy === SortBy.completed;
+
+    return todos.filter(({ completed }) => completed === isCompleted);
+  }, [sortBy, todos]);
+
+  const inputRef = useRef<HTMLInputElement | null>(null);
+
+  useEffect(() => {
+    if (inputRef.current && isTodoEdit !== null) {
+      inputRef.current.focus();
+    }
+  }, [isTodoEdit]);
+
+  const handleKeyDown = async (
+    e: { key: string; }, todoId:number, todoTitle:string,
+  ) => {
+    handleDeleteUptadeTodo(true);
+    if (e.key === 'Enter') {
+      let updatedTodo: Todo | undefined = todos.find(
+        todo => todo.id === todoId,
+      );
+
+      if (todoTitle === '' && updatedTodo) {
+        try {
+          setIsTodoEdit(null);
+          handleSelectedTodo([...selectedTodo, todoId]);
+          await deleteTodo(userId, todoId);
+        } catch (error) {
+          handleError(Errors.delete);
+        } finally {
+          handleSelectedTodo([]);
+        }
+      } else if (updatedTodo && todoTitle !== updatedTodo.title) {
+        updatedTodo
+          ? updatedTodo = { ...updatedTodo, title: todoTitle }
+          : null;
+
+        try {
+          setIsTodoEdit(null);
+          handleSelectedTodo([...selectedTodo, todoId]);
+          await updateTodo(userId, updatedTodo, todoId);
+        } catch (error) {
+          handleError(Errors.update);
+        } finally {
+          handleSelectedTodo([]);
+        }
+      } else {
+        setIsTodoEdit(null);
+      }
+
+      handleDeleteUptadeTodo(false);
+      handleSetMakeAnyChange(!makeAnyChange);
+    }
+
+    if (e.key === 'Escape') {
+      setInputValue('');
+      setIsTodoEdit(null);
+    }
+  };
+
+  const checkIsLoading = (todo: Todo) => (
+    isLoading || (isDeleteUpdateTodo && selectedTodo.includes(todo.id))
+  );
+
+  return (
+    <section className="todoapp__main">
+      <ul>
+        {filteredTodos.map(todo => (
+          <li
+            className={todo.completed ? 'todo completed' : 'todo'}
+            key={todo.id}
+          >
+            <label className="todo__status-label">
+              <input
+                type="checkbox"
+                className="todo__status"
+                checked={todo.completed}
+                onClick={() => {
+                  handleUpdateCheckTodo(todo.id);
+                }}
+              />
+            </label>
+
+            {todo.id === isTodoEdit
+              ? (
+                <form>
+                  <input
+                    type="text"
+                    ref={inputRef}
+                    className="todo__title-field"
+                    value={inputValue}
+                    onChange={(e) => {
+                      setInputValue(e.target.value);
+                    }}
+                    onKeyDown={(e) => {
+                      handleKeyDown(e, todo.id, inputValue);
+                    }}
+                    onBlur={() => {
+                      handleKeyDown({ key: 'Enter' }, todo.id, inputValue);
+                    }}
+                  />
+                </form>
+              ) : (
+                <>
+                  <span
+                    className="todo__title"
+                    onDoubleClick={() => {
+                      setIsTodoEdit(todo.id);
+                      setInputValue(todo.title);
+                    }}
+                  >
+                    {todo.title}
+                  </span>
+
+                  <button
+                    type="button"
+                    className="todo__remove"
+                    onClick={() => {
+                      handleDeleteTodo(todo.id);
+                    }}
+                  >
+                    ×
+                  </button>
+                </>
+              )}
+
+            <div
+              className={checkIsLoading(todo)
+                ? 'modal overlay is-active'
+                : 'modal overlay'}
+            >
+              <div className="modal-background has-background-white-ter" />
+              <div className="loader" />
+            </div>
+          </li>
+        ))}
+        {tempTodo && (
+          <TempTodo
+            tempTodo={tempTodo}
+            handleDeleteTodo={handleDeleteTodo}
+          />
+        )}
+      </ul>
+    </section>
+  );
+};
diff --git a/src/hooks.ts b/src/hooks.ts
new file mode 100644
index 0000000000..7063081e8c
--- /dev/null
+++ b/src/hooks.ts
@@ -0,0 +1,44 @@
+import { useEffect, useState } from 'react';
+import { getTodos } from './api/todos';
+import { Errors, Todo } from './types';
+
+export const useGetTodos = (USER_ID: number, makeAnyChange: boolean) => {
+  const [isLoading, setIsLoading] = useState(true);
+  const [todos, setTodos] = useState<Todo[]>([]);
+  const [errorMessage, setErrorMessage] = useState<Errors>(Errors.noError);
+
+  useEffect(() => {
+    async function fetchTodos() {
+      try {
+        const data = await getTodos(USER_ID);
+
+        setTodos(data);
+      } catch (error) {
+        setErrorMessage(Errors.load);
+      } finally {
+        setIsLoading(false);
+      }
+    }
+
+    fetchTodos();
+  }, [makeAnyChange]);
+
+  useEffect(() => {
+    if (errorMessage) {
+      setTimeout(() => {
+        setErrorMessage(Errors.noError);
+      }, 3000);
+    }
+  }, [errorMessage]);
+
+  const handleError = (error: Errors) => {
+    setErrorMessage(error);
+  };
+
+  return {
+    isLoading,
+    todos,
+    errorMessage,
+    handleError,
+  };
+};
diff --git a/src/styles/todoapp.scss b/src/styles/todoapp.scss
index 836166156b..69a09c44c1 100644
--- a/src/styles/todoapp.scss
+++ b/src/styles/todoapp.scss
@@ -129,5 +129,9 @@
     &:active {
       text-decoration: none;
     }
+
+    &:disabled {
+      opacity: 0;
+    }
   }
 }
diff --git a/src/types/Errors.ts b/src/types/Errors.ts
new file mode 100644
index 0000000000..596af23617
--- /dev/null
+++ b/src/types/Errors.ts
@@ -0,0 +1,8 @@
+export enum Errors {
+  noError = '',
+  emptyTitle = "Title can't be empty",
+  delete = 'Unable to delete a todo',
+  add = 'Unable to add a todo',
+  load = 'Unable to load a todo',
+  update = 'Unable to update a todo',
+}
diff --git a/src/types/SortBy.ts b/src/types/SortBy.ts
new file mode 100644
index 0000000000..986d61b1af
--- /dev/null
+++ b/src/types/SortBy.ts
@@ -0,0 +1,5 @@
+export enum SortBy {
+  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/types/index.ts b/src/types/index.ts
new file mode 100644
index 0000000000..2a10bdf118
--- /dev/null
+++ b/src/types/index.ts
@@ -0,0 +1,3 @@
+export * from './Todo';
+export * from './SortBy';
+export * from './Errors';
diff --git a/src/utils/fetchClient.ts b/src/utils/fetchClient.ts
new file mode 100644
index 0000000000..6d5e913e4f
--- /dev/null
+++ b/src/utils/fetchClient.ts
@@ -0,0 +1,42 @@
+/* eslint-disable @typescript-eslint/no-explicit-any */
+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: any = 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: any) => request<T>(url, 'POST', data),
+  patch: <T>(url: string, data: any) => request<T>(url, 'PATCH', data),
+  delete: (url: string) => request(url, 'DELETE'),
+};