Someone shared an npm package with you. Before using it, spend a few minutes reviewing it.
Open the npm package page. Read the package description and README. Understand what problem the package solves.
Open the GitHub repository from the npm page. Check the source code and project structure.
Review the README. Check whether installation steps and examples are clear.
Check whether README links to documentation and documentation links back to README.
Read dev.md. Check whether another developer can easily understand and continue the project.