spread operator - ［▌▣］

spread operator

→展開運算子

Spread syntax (...) - JavaScript | MDN

於ES6新增，陣列

在ES2018後，物件也可使用相同運算子

且用在等號的左邊時，會為rest（剩餘）而非spread

code:javascript

const user = { name: 'Taro', age: 25 }

const updatedUser = { ...user, age: 26 }

const { password, ...publicUserData } = userData

// publicUserData = 除去password的物件