Today, as I was exploring a TypeScript repository, I noticed that all the classes were structured in a particular way:
export class ServiceClass {
private static instance: ServiceClass;
private constructor() {}
public static Instance(): ServiceClass {
if (!ServiceClass.instance) {
ServiceClass.instance = new ServiceClass();
}
return ServiceClass.instance;
}
// public static ServiceMethod1
// public static ServiceMethod2
// public static ServiceMethod3
}
The methods of the class were called using
new ServiceClass.Instance().ServiceMethod1()I wondered about the purpose of having the Instance() method. If only the service methods were included in the class and accessed like this:
const obj = new ServiceClass();
obj.ServiceMethod1();
Could this be a specific design pattern at play here?