Union and Intersection Type Operators

| and & define union and intersection types

You can combine types together to get wackier types.

interface A
{
	id: number;
	title: string;
}
 
interface B
{
	id: string;
	views: number;
}
 
type AandB = A & B;
type AorB = A | B;
 
var aandb: AandB; // Contains id, title, and views, where 'id: never' (it cannot be a number and string simultaneously)
var aorb: AorB; // Contains just id, where 'id: number | string'