Error Comparison and Information Utility

check-error is a JavaScript utility library designed for robust error inspection and comparison in both Node.js and browser environments. Currently at stable version 2.1.3, it provides functions to retrieve error information, such as constructor names and messages, and to determine compatibility between errors based on their instance, constructor, or message content. It is a foundational utility often employed within testing frameworks, particularly Chai, for asserting error conditions. Since version 2.0.0, it is an ESM-only module, requiring modern JavaScript environments (Node.js 16+, Firefox 102+, Chromium Edge+). Releases are infrequent, focusing on maintenance and modernizing the codebase to align with current JavaScript standards. Its key differentiator is providing a standardized set of primitives for error interrogation, abstracted away from environment-specific quirks, which simplifies error handling logic across different contexts. This ensures consistent behavior when dealing with various types of errors and their properties.