Create custom npm module, Folder and file structure

 Create npm module then publish it, use it in your project 

To cerate npm we need to create

1 package.json

2 tsconfig.json

3 ngModule

4 index.ts

Folder Structure 

package.json

tsconfig.json

src

    index.ts

    mymodule

REF: https://devdactic.com/custom-ionic-module-npm/