Created
November 15, 2023 12:39
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import "./App.css" | |
import { useState } from "react" | |
function App() { | |
const [todoText, setTodoText] = useState("") | |
const [todoList, setTodoList] = useState([ | |
{ value: "do homework", isChecked: true, id: 0 }, | |
{ value: "watch a movie", isChecked: false, id: 1 }, | |
{ value: "make bed", isChecked: true, id: 2 } | |
]) | |
/* | |
- Add todo | |
- reset input | |
- Completed state | |
- Delete todo | |
STATE: | |
- input | |
- todo list | |
- completed | |
*/ | |
const addTodo = () => { | |
setTodoText("abc") | |
const newTodo = { | |
value: todoText, | |
isChecked: false | |
} | |
setTodoList([...todoList, newTodo]) | |
} | |
const completeTodo = (id) => { | |
const newTodos = todoList.map((todo) => { | |
if (todo.id === id) { | |
// update todo | |
return { ...todo, isChecked: !todo.isChecked } | |
} | |
return todo | |
}) | |
setTodoList(newTodos) | |
// state is readonly | |
// todoList[id].isChecked = true | |
// todoList.push() | |
} | |
const deleteTodo = (id) => { | |
setTodoList(???) | |
} | |
const todos = todoList.map((todo, todoIndex) => { | |
const elementClass = todo.isChecked ? "todo-completed" : "" | |
return ( | |
<li className={elementClass} key={todoIndex}> | |
<span className="todo-text">{todo.value}</span> | |
<button onClick={() => completeTodo(todo.id)}>Check</button> | |
<button onClick={() => deleteTodo(todo.id)}>Delete</button> | |
</li> | |
) | |
}) | |
return ( | |
<div style={{ fontFamily: "sans-serif" }}> | |
<h1>Todos</h1> | |
<input | |
type="text" | |
onChange={(event) => setTodoText(event.target.value)} | |
value={todoText} | |
placeholder="Type something..." | |
/> | |
<button onClick={addTodo}>Add</button> | |
<ul>{todos}</ul> | |
</div> | |
) | |
} | |
export default App |
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