接口与类型

type与interface

内置的语法糖

Partial和Required

Partial将传入的属性变为可选
type Oc= Partial

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

Required 将传入的属性变为必选
type Oc= Required

type Required<T> = { [P in keyof T]-?: T[P] };

Readonly

Readonly将传入的属性变为只读

	type Oc= Partial<IProps>
	type Readonly<T> = {
	    readonly [P in keyof T]: T[P];
	}

Omit

Exclude (继承)

	interface Point {
	  x: number;
	  y: number;
	}