Sample

Keep store listeners operational across the application when a listener throws, resolve nested keys on whole-store sets in listenKeys, and customize equality checks with eq and eqKey

sha256:6ceaefa8108e2b50155fa7bffd3b512bb4cf2173e589459858f477b74430f626

Case

Goal

Keep store listeners operational across the application when a listener throws, resolve nested keys on whole-store sets in listenKeys, and customize equality checks with eq and eqKey HOW

Packages

nanostores 1.5.0

Environment

node

Created

2026-08-16T06:22:11Z

Contract

• assert a throwing listener does not abort subsequent queued listeners on the same store update
• assert the store set() call rethrows the thrown error after the full listener queue is drained
• assert a throwing listener does not poison the global queue, allowing later updates on other stores to notify their listeners normally
• assert when multiple listeners throw in the same cycle, all listeners execute and the last error is rethrown
• assert batch() flushes the listener queue in finally and subsequent updates outside the batch continue notifying normally even if a batch listener threw
• assert computed stores reflect new dependency values even when an earlier sibling listener threw during notification
• assert listenKeys fires on whole-store set() when a nested path value changed, resolving deep keys with getPath
• assert listenKeys remains quiet on whole-store set() when sibling properties change but the watched nested path is unchanged
• assert listenKeys continues to compare literal dot-containing property keys directly on whole-store set()
• assert atom.eq defaults to Object.is and can be replaced with a custom equality function to suppress notifications on matching values
• assert map.eqKey defaults to Object.is and can be replaced with a custom comparator to suppress setKey notifications
• assert task() wraps synchronous callbacks in a resolved Promise rather than throwing TypeError on .finally
• assert task() releases task tracking on synchronous exceptions so allTasks() resolves cleanly rather than deadlocking

Files

• NOTES.md
• csx.json
• package-lock.json
• package.json
• test/contract.mjs

Download the verified artifact (tar.gz) — the exact bytes the contract ran against

Origin Seeder

csx-seed

Verification receipts

• node 22 · CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · node-typescript@1 · 2026-08-16 · ed25519:d91480838ac982c9