ArraySpy is a Chrome extension aimed at simplifying the debugging of array transformations in JavaScript. It provides real-time tracking of array methods such as map, filter, and flatMap, allowing developers to view the current and previous states of arrays right in the console. This tool is particularly useful for those utilizing functional programming, as it alleviates some challenges associated with debugging complex data transformations.

By offering a global `__arraySpy` object, users can easily access the state of arrays before and after transformations without cluttering their code with console.log statements. With customizable tracking options and non-intrusive functionality, ArraySpy helps maintain clean code while providing valuable insights into data flow, making it an essential tool for developers who frequently work with arrays.