有没有办法在es6中将对象解构为新对象？

Question

例如,我有这个对象:

const payload = {
    apple: 1,
    dog: 2,
    cat: 3
}

我想将它解构为一个只包含apple和的新对象dog:

const newPayload = {
    apple:1,
    dog: 2
}

就像是:

const {{apple, dog} : newPayload} = payload

显然以上是错误的,但想知道是否有办法做这样的事情.

谢谢!

Answer 1

你可以使用delete:

const newPayload = { ...payload };

delete newPayload.cat

要么:

const { cat, ...newPayload } = payload;

Lodash还有omit():

const newPayload = _.omit(payload, ['cat']);

Answer 2

大概分两步：

const payload = {
    apple: 1,
    dog: 2,
    cat: 3
}

const { apple, dog } = payload

const newPayload = {
    apple,
    dog,
}

或者你可以使用 lodash _.pick：

const newPayload = _.pick(payload, ['apple', 'dog'])