This is a "common" module which will have all the necessary functions or Variables which both "Frontend" and "BackEnd" need. this module we will deploy to NPM and import whereever we need it, like we are installing other packages.

In "tsconfig.json" file---- i have to set declaration to "True". As we know, when we will publish a module or package onto the NPM, it will be in Javascript. So to publish "Types" (in the ".d.ts" file) along with javascript (".js" file).