Sample NPM Library using NestJS

Process

1. Create a new NestJS project using NestJS CLI
2. Create a new file called index.ts in the src folder
3. Then add the following code to the index.ts file

export { WhatevertheServiceYouWant } from './theLocationForTheService';

Example in this application

export { AppService } from './app.service';

4. Before building the project, you need to add the following code to the package.json file. (Replace the dist if you have a different output folder)

  "main": "dist/index.js",

Optional (For Local Usage)---

5. If you want to use this in a local project, you can use the following command to link the project to your local project and make it available for globally for use.

npm link

6. How to use the library in your project

import { WhatevertheServiceYouWant } from 'name-of-the-package-as-in-package.json-under-"name:" attribute';

Example in this application

import { AppService } from 'sample-library';

7. Finally build the project using the following command

npm run build

Now your NestJS based NPM library is ready to use.