How to create Singleton Class in Typescript and use it

Hi Everybody, Today I will show you all how to write a Singleton class in Typescript and use it in you applications.
Below are the classes which I created one consists of Singleton class and other one to import and use it.

The First class is the one which provides the Singleton Implementation and the second one is the one which I imported and used to store the data.
Please leave comments if you have any questions.