The common modules provides a set of utilities classes and reusable building blocks used throughout the @pnp modules. They can be used within your applications as well.
Install the library and required dependencies
npm install @pnp/common --save
Import and use functionality, see details on modules below.
import { getGUID } from "@pnp/common";
console.log(getGUID());
Graphical UML diagram of @pnp/common. Right-click the diagram and open in new tab if it is too small.