fetch-todos-thunk.ts

import {loadingTodos, loadTodosSuccess} from '../state/todo.actions';

export const fetchAllTodos = () => 
  (dispatch, getState, todoRepository: TodoRepository) => {
    dispatch(loadingTodos());
    fetch('https://jsonplaceholder.typicode.com/todos')
      .then(result => result.json())
      .then(todos => dispatch(loadTodosSuccess(todos)))
};