The npm package @epic-web/invariant had only one release, version 1.0.0, in December 2023. From January 2024 to September 2025, there have been no new releases. The package appears to be inactive in terms of updates and new versions.
@epic-web/invariant provides production-ready invariants (assertions) for TypeScript and JavaScript. It enhances runtime checks with helpful error messages and automatically strips out invariant checks in production environments to minimize performance overhead. This package offers a tiny, performant alternative to larger assertion libraries, enabling developers to confidently enforce expected conditions throughout their codebase while maintaining optimal performance in production. It's designed for use in both client-side and server-side JavaScript applications.
@epic-web/invariant downloads show strong growth from March 2024 to August 2025, peaking dramatically in July and August 2025, reaching 3.5 million. September 2025 downloads are already at 2.1 million, suggesting continued high usage, but could be incomplete due to being the current month.
