Singleton Pattern in Typescript

singleton-patterm-ts

class Office {
  name: string;
  employees: number;
  private static instance: Office;

  constructor(name: string, employees: number) {
    this.name = name;
    this.employees = employees;

    if (typeof Office.instance === "object") {
      return Office.instance;
    }

    Office.instance = this;
    return this;
  }
}

const office1 = new Office("Principal", 30);
console.log(office1);

const office2 = new Office("Diagonal", 50);
console.log(office2);