define-properties is a robust utility for defining multiple properties on an object, with fine-grained control over configurability, enumerability, and writability. It leverages ES5's Object.defineProperty for maximum compatibility, while providing a convenient, declarative API. Crucially, it prevents common pitfalls like accidentally making properties non-enumerable. This package is crucial for library authors needing precise property control, including setting defaults, and avoiding unforeseen side effects related to property definitions. It ensures predictable object behavior across various JavaScript engines.
