App.js

import React, { useEffect, useState } from 'react';
import { useActions, useStore } from 'easy-peasy';

export default function App() {
  return (
    <div>
      <h1 style={{ margin: 0 }}>Todo</h1>
      <Todos />
      <AddTodo />
    </div>
  );
}

function AddTodo() {
  const [text, setText] = useState('');
  const save = useActions(actions => actions.add);
  const handleAddClick = () => {
    save(text);
    setText('');
  };
  const handleTextChange = e => setText(e.target.value);
  return (
    <div>
      <input
        value={text}
        onChange={handleTextChange}
        placeholder="What to do next"
      />
      {text && <button onClick={handleAddClick}>Add</button>}
    </div>
  );
}

function Todos() {
  const todos = useStore(state => state.todos);
  const { toggle, del } = useActions(actions => ({
    toggle: actions.toggle,
    del: actions.delete,
  }));
  const todosList = Object.values(todos);
  return todosList.map(todo => (
    <Todo key={todo.id} todo={todo} toggle={toggle} del={del} />
  ));
}

function Todo({ todo: { id, text, done }, toggle, del }) {
  return (
    <div
      onClick={() => toggle(id)}
      style={{
        cursor: 'pointer',
        textDecoration: done ? 'line-through' : undefined,
      }}
    >
      {text}
      <button
        onClick={e => {
          e.stopPropagation();
          del(id);
        }}
        style={{ marginLeft: 10 }}
      >
        Delete
      </button>
    </div>
  );
}