Typescript Advanced Types Development Tutorials, Guides & Insights

Intersection types combine multiple types into one. An object of an intersection type must satisfy all the combined types.

interface Person {
  name: string;
}

interface Employee {
  employeeId: number;
}

type EmployeePerson = Person & Employee;

const john: EmployeePerson = {
  name: 'John Doe',
  employeeId: 1234,
};