flyingsquirrel0419/layercache

What's Changed

Added

• Added exact-key invalidation aliases: invalidateByKey() and invalidateByKeys(), mirroring delete() and mdelete() while matching the invalidateBy* API family.
• Added exact-key stale-preserving expiration: expireByKey() and expireByKeys(), allowing specific keys to be marked stale without deleting their stale-while-revalidate / stale-if-error windows.
• Added namespace exact-key APIs so CacheNamespace exposes the same exact-key invalidation and expiration helpers with namespace-scoped keys.
• Added public TypeScript JSDoc descriptions across methods, options, metrics, layers, serializers, integrations, and helpers.

Changed

• Bumped the package version from 2.0.0 to 2.1.0.
• Updated docs-web package metadata and the landing page version badge to 2.1.0.
• Updated API documentation for exact-key invalidation aliases and stale-preserving expiration methods.
• Updated the docs playground to support and demonstrate the latest exact-key syntax.
• Refreshed the docs playground UI with clearer theme behavior, visible controls, copy fallback behavior, and a clearer editor/result layout.

Fixed

• Fixed the playground stale-while-revalidate examples so they use millisecond TTL options and demonstrate stale serving during background refresh before showing the refreshed value.
• Fixed light-mode playground controls and result panels readability after the docs UI refresh.

Verification

• Node.js 20 CI passed.
• Node.js 22 CI passed.
• Vercel preview passed.
• Coveralls passed.