Platform.js

Platform.js is a lightweight JavaScript library designed for comprehensive platform, browser, OS, and device detection across nearly all JavaScript environments, including browsers, Node.js, and AMD loaders. It is currently stable at version 1.3.6, with the README referencing 1.3.5. As part of the BestieJS 'Best in Class' module collection, it emphasizes solid environment support, ES5+ compatibility, and thorough testing. A key differentiator is its detailed output, providing granular information like browser name, version, layout engine, OS, and device manufacturer. However, it explicitly states it is for informational purposes only and not a substitute for robust feature detection or inference checks, which is a crucial distinction from modern approaches to browser capabilities.