Intersection type
Combines multiple types into one that has all their members.
Syntax
A & B & CExamples
type Named = { name: string };
type Aged = { age: number };
type Person = Named & Aged;
const p: Person = { name: 'Ada', age: 36 };
type WithId<T> = T & { id: number };
Notes
An intersection value must satisfy every member type simultaneously. Useful
for mixing object shapes and adding fields to a generic. Intersecting
conflicting primitive types (for example `string & number`) yields `never`.