disposable-lock@2.0.0

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Highlights

• Updated the request() API to return null when a lock cannot be acquired (e.g., ifAvailable: true), replacing the previous NotHaveLock object.
• Ensures compatibility with await using / AsyncDisposable patterns.
• TypeScript types updated to reflect Promise<ReleasableLock | null> return type.

Changes

Changed

• lock(name).request() now returns Promise<ReleasableLock | null> instead of Promise<ReleasableLock | NotHaveLock>.
• Explicit lock acquisition failure is now represented as null, making if (lock) checks safe and intuitive.
• Simplified README examples to reflect null handling and AsyncDisposable usage.

Fixed

• await using works safely even if the lock could not be acquired.

References

• Web Locks API
• disposable-lock npm package
• AsyncDisposable proposal: TC39 Explicit Resource Management