What is the primary purpose of the new NPM SDK?

The primary purpose of the new NPM SDK is to build custom applications using front-end tools. This SDK serves as a powerful toolkit designed specifically for developers who are looking to leverage the capabilities of Liferay's front-end frameworks and components. By facilitating the creation of custom applications, the NPM SDK enables developers to utilize modern JavaScript, CSS, and other web development technologies to create user interfaces and interactions that are both rich and responsive.

The focus on front-end tools allows for streamlined development processes, enabling developers to create highly customizable applications that can integrate seamlessly with Liferay's platform. The SDK provides the necessary libraries, resources, and instructions for building and deploying these applications effectively.

In contrast, the choices regarding database management systems, improving server-side performance, and handling back-end integration do not accurately capture the core functionality of the NPM SDK, which is explicitly centered around enhancing front-end development capabilities within the Liferay ecosystem.