The querystring module provides utilities for parsing and formatting URL query strings.

On the World Wide Web, a query string is the part of a uniform resource locator (URL) containing data that does not fit conveniently into a hierarchical path structure. The query string commonly includes fields added to a base URL by a Web browser or other client application, for example as part of an HTML form.

node-querystring allow one to encode, decode, parse and stringify query string.

Node.js is an event-based server-side JavaScript engine.