merge objects typescript code example

Example 1: merge properties of object typescript

const target = { a: 1, b: 2 };
const source = { b: 4, c: 5 };
// Copies source to target object without changing
// target object instance
const returnedTarget = Object.assign(target, source);

Example 2: merge two types typescript

interface IStudent {
    id: string;
    age: number;
}

interface IWorker {
    companyId: string;
}

type IStudentAlias = IStudent;

type ICustomType = IStudent | IWorker;

let s: IStudentAlias = {
    id: 'ID3241',
    age: 2
};