除联合类型的交集是取共同的部分外，其他类型的交集是取所有

  type TypeA = { a: string; b: number; };  type TypeB = { b: number; c: boolean; };  type IntersectionType = TypeA & TypeB; // { a: string; b: number; c: boolean; }type test2 = ('1' | '2') & ('1' | '3')

如果编辑器没有简化交叉类型可以自己处理下

interface User {name: stringage: numberaddress: string}type UserPartialName = PartialByKeys<User, 'name'>type PartialByKeys<T, K> = {[P in keyof T as P extends K ? P : never]?: T[P]} & {[P in Exclude<keyof T, K>]: T[P]}此时UserPartialName 显示// type UserPartialName = {//   name?: string | undefined;// } & {//   age: number;//   address: string;// } 

可以人为处理下

type IntersectionToObj<T> = {[K in keyof T]: T[K]}type PartialByKeys<T , K = any> = IntersectionToObj<{[P in keyof T as P extends K ? P : never]?: T[P]} & {[P in Exclude<keyof T, K>]: T[P]}>