Path and Query Parameters in Express.js

Now that we understand how Express.js works and handles incoming requests, let’s take the next step closer to understanding path (route) parameters and query parameters. Path and query parameters are important aspects of API development. Some of the popular use cases of these parameters are mentioned below:

• Resource identification and filtering: Path parameters can be used to identify specific resources in an API, while query parameters can be used to filter resources based on specific criteria. For example, in an e-learning application, a path parameter could be used to identify a specific course by its ID, while query parameters could be used to filter courses based on category or price range.

• Pagination and sorting: Path parameters can be used to paginate large datasets, while query parameters can be used to sort data based on a specific attribute. For example, in an e-commerce application, a path parameter could be used to specify the page ...