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Exploring ng-package (Angular Library Packaging)

exploring ng-package

In the intricate world of Angular development, efficiently packaging libraries is essential for seamless integration and distribution. Among the array of tools available, ng-package stands out as a specialized solution tailored for Angular libraries.

Let’s delve into the details, advantages, real-life applications, and alternatives of ng-package to uncover its full potential.

1. Understanding ng-package

  • It’s a dedicated tool designed to streamline the packaging process for Angular libraries.
  • It simplifies the creation of npm packages that are compatible with Angular projects, ensuring adherence to Angular’s standards and best practices.

2. Installation and Usage Guide

To harness the power of ng-package, follow these step-by-step instructions:

Step 1: Install Node.js and npm

Ensure you have Node.js and npm installed on your system. Visit the official Node.js website to download and install the latest version for your operating system.

Step 2: Install ng-package Globally

Open your terminal or command prompt and run the following command to install ng-package globally:

npm install -g ng-packagr

Step 3: Create ng-package.json Configuration

Navigate to the root directory of your Angular library project and create a configuration file named ng-package.json. This file will contain the configuration options for packaging your library.

Step 4: Configure ng-package.json

In the ng-package.json file, specify the entry file of your library, any additional assets or resources to include, and any other configuration options you require. Here’s a basic example:

  "$schema": "./node_modules/ng-packagr/ng-package.schema.json",
  "lib": {
    "entryFile": "src/public_api.ts"

Step 5: Build Your Library Package

Run ng-packagr in the terminal, pointing it to your configuration file:

ng-packagr -p ng-package.json

This command will read the configuration file and build your Angular library package based on the specified settings.

Step 6: Publish Your Package

After the package is built successfully, navigate to the dist directory (created by ng-packagr) where your packaged library is located. You can now publish this directory as an npm package.

3. Pros and Cons of ng-package

Ensures compatibility with the Angular ecosystemDependency on a third-party tool
Ensures compatibility with Angular ecosystemRequires learning curve for configuration
Optimizes distribution of Angular librariesDependency on third-party tool
Offers flexibility through configuration options

4. Real-life Uses in Projects

  1. Reusable Components: Developers can package Angular components, directives, and services using ng-package, making them easily shareable and reusable across projects.
  2. Custom Modules: ng-package facilitates the creation of custom Angular modules bundled as npm packages, enabling modular architecture in large-scale applications.
  3. UI Libraries: Building UI libraries with ng-package ensures consistency and compatibility with Angular applications, offering a seamless user experience across projects.

5. Alternatives to ng-package

While ng-package is a popular choice for Angular library packaging, several alternatives serve similar purposes:

  1. Manually Configured Builds: Developers can manually configure webpack or other bundlers to package Angular libraries. This approach offers more control but requires additional configuration.
  2. Angular CLI: The Angular CLI provides built-in support for generating libraries. While not as customizable as ng-package, it offers a straightforward solution integrated into the Angular ecosystem.
  3. Rollup: Rollup.js is a versatile JavaScript bundler that can be configured to package Angular libraries. It offers advanced optimization features but may require more setup compared to ng-package.

6. Conclusion

ng-package empowers Angular developers to package their libraries efficiently, ensuring compatibility and adherence to Angular standards. By understanding its features, advantages, real-life applications, and step-by-step usage guide, developers can leverage ng-package it to streamline their workflow and enhance code reusability. Choose the tool that best suits your project requirements and embark on a journey of seamless Angular development.

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