Singleton class

Giovanny Gongora

Singleton is a creational design pattern that lets you ensure that a class has only one instance, while providing a global access point to this instance.

export class Singleton {
  // A variable that stores the singleton object. Initially,
  // the variable acts like a placeholder
  private static singleton: Singleton;
  // private constructor so that no instance is created
  private constructor() {
  }
  // This is how we create a singleton object
  public static getInstance(): Singleton {
    // check if an instance of the class is already created
    if (!Singleton.singleton) {
      // If not created create an instance of the class
      // store the instance in the variable
      Singleton.singleton = new Singleton();
    }
    // return the singleton object
    return Singleton.singleton;
  }
}