Created
March 31, 2020 22:38
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import React from "react"; | |
import "./TodoApp.css"; | |
export default function TodoApp() { | |
const [todo, setTodo] = React.useState(""); | |
const [todos, setTodos] = React.useState([]); | |
const handleChange = e => { | |
setTodo(e.target.value); | |
}; | |
const addTodo = () => { | |
setTodos([ | |
...todos, | |
{ | |
id: todos.length + 1, | |
text: todo, | |
completed: false | |
} | |
]); | |
}; | |
const onSubmit = e => { | |
e.preventDefault(); | |
if (todo === "") return; | |
addTodo(); | |
setTodo(""); | |
}; | |
const removeTodo = todoId => { | |
const updatedTodos = todos.filter(todo => todo.id !== todoId); | |
setTodos(updatedTodos); | |
}; | |
const toggleTodo = todoId => { | |
const updatedTodos = todos.map(todo => { | |
return todo.id === todoId | |
? { ...todo, completed: !todo.completed } | |
: todo; | |
}); | |
setTodos(updatedTodos); | |
}; | |
return ( | |
<div className="container"> | |
<form onSubmit={onSubmit}> | |
<label htmlFor="todo">Todo text</label> | |
<br /> | |
<input | |
id="todo" | |
className="todo-input" | |
onChange={handleChange} | |
value={todo} | |
/> | |
<button type="submit" className="add-btn"> | |
Add | |
</button> | |
</form> | |
<div> | |
<ul> | |
{todos.map(todo => ( | |
<li key={todo.id}> | |
<span | |
className={todo.completed ? "todo-completed" : undefined} | |
onClick={() => toggleTodo(todo.id)} | |
> | |
{todo.text} | |
</span> | |
<span className="delete-btn" onClick={() => removeTodo(todo.id)}> | |
x | |
</span> | |
</li> | |
))} | |
</ul> | |
</div> | |
</div> | |
); | |
} |
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