[Typescript] “Partial” Mapped Type

时间：2020-10-02 00:11:33 收藏：0 阅读：39

type MyPartial<T> = {
    [P in keyof T]?: T[P]
}

‘in‘ like a loop.

Usage:

function updatePerson(person: Person, prop: MyPartial<Person>) {
    return {...person, ...prop}
}

or built-in:

function updatePerson(person: Person, prop: Partial<Person>) {
    return {...person, ...prop}
}

原文：https://www.cnblogs.com/Answer1215/p/13758733.html