jsdom is a pure-JavaScript implementation of the WHATWG DOM and HTML standards, for use with Node.js. Emulating a web browser environment without a graphical user interface, jsdom enables you to run browser-based JavaScript code, such as unit tests or web scraping scripts, in a server-side context. This is useful for testing front-end code in a Node.js environment, manipulating HTML, and simulating user interactions programmatically, providing a consistent testing or automation workflow.