const todos = (state = [], action) => {
switch (action.type) {
case 'ADD_TODO':
return [
...state,
{
id: action.id,
text: action.text,
completed: false
}
]
case 'TOGGLE_TODO':
return state.map(todo =>
todo.id === action.id ? { ...todo, completed: !todo.completed } : todo
)
default:
return state
}
}
我试图了解reducer中以下部分的含义:
[
...state,
{
id: action.id,
text: action.text,
completed: false
}
]
1)... state是什么意思?
2)对象是否跟随状态附加到状态之后?
答案 0 :(得分:5)