{"adoption": {"forks": 120, "observed_at": "2026-08-28T04:03:26.010711+00:00", "stars": 1061}, "canonical_url": "https://ross.abutalabs.com/products/facebookarchive-emitter", "card": {"archived": true, "artifact_type": "library", "description": "A JS EventEmitter foundation for evented code", "domain": ["frontend", "web-development", "developer-tools"], "enriched": true, "function": ["middleware", "developer-tools"], "health_score": 10, "homepage": null, "language": "JavaScript", "license": "NOASSERTION", "license_family": "other", "maturity": "maintenance", "member_repos": ["facebookarchive/emitter"], "name": "facebookarchive/emitter", "platform": ["browser"], "pushed_at": "2021-07-01T23:23:56+00:00", "repo": "facebookarchive/emitter", "stars": 1061, "tags": ["event-emitter", "pubsub", "evented-architecture", "fbemitter", "observer-pattern", "javascript", "nodejs"], "topics": [], "urls": [], "use_cases": ["implement pub/sub event handling in JavaScript", "replace Node's EventEmitter in browser code", "build event-driven architectures on the web", "manage listener subscriptions with easy removal", "create a foundation for custom event systems", "decouple components via emitted events"], "what_it_is": "A lightweight JavaScript EventEmitter library (npm package fbemitter) from Facebook that prioritizes speed and simplicity for event-driven code. It provides addListener, once, emit, and subscription-based listener removal, conceptually similar to Node's EventEmitter.", "when_to_avoid": ["you need Node's native EventEmitter API compatibility", "you require advanced features like wildcard events or async listeners", "you want an actively developed library with ongoing releases"], "when_to_choose": ["you need a small, fast, dependency-free emitter for browser or Node", "you want subscription tokens for precise listener removal", "you're building larger event abstractions on a simple base"]}, "data_as_of": "2026-08-30T08:39:29.467469+00:00", "members": [{"path": "/products/facebookarchive-emitter", "repo": "facebookarchive/emitter", "role": "main", "score": 10}], "provenance": {"archived": {"kind": "observed", "observed_at": "2026-08-28T04:03:26.010711+00:00", "source": "github"}, "artifact_type": {"confidence": null, "enriched_at": "2026-08-30T06:56:50.209733+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "0fd3a4f1a87569395221eca58770e58e8ae6f47faa06d97ea216bb7ae3f62bfc", "fetched_at": "2026-08-28T04:03:26.010711+00:00", "kind": "readme", "missing": false, "url": "https://github.com/facebookarchive/emitter"}], "taxonomy_version": 1}, "description": {"kind": "observed", "observed_at": "2026-08-28T04:03:26.010711+00:00", "source": "github"}, "domain": {"confidence": null, "enriched_at": "2026-08-30T06:56:50.209733+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "0fd3a4f1a87569395221eca58770e58e8ae6f47faa06d97ea216bb7ae3f62bfc", "fetched_at": "2026-08-28T04:03:26.010711+00:00", "kind": "readme", "missing": false, "url": "https://github.com/facebookarchive/emitter"}], "taxonomy_version": 1}, "enriched": {"inputs": [], "kind": "computed", "method": "enrichment_status"}, "function": {"confidence": null, "enriched_at": "2026-08-30T06:56:50.209733+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "0fd3a4f1a87569395221eca58770e58e8ae6f47faa06d97ea216bb7ae3f62bfc", "fetched_at": "2026-08-28T04:03:26.010711+00:00", "kind": "readme", "missing": false, "url": "https://github.com/facebookarchive/emitter"}], "taxonomy_version": 1}, "health_score": {"inputs": ["days_since_push", "days_since_release", "archived"], "kind": "computed", "method": "health_v1"}, "homepage": {"kind": "observed", "observed_at": "2026-08-28T04:03:26.010711+00:00", "source": "github"}, "language": {"kind": "observed", "observed_at": "2026-08-28T04:03:26.010711+00:00", "source": "github"}, "license": {"kind": "observed", "observed_at": "2026-08-28T04:03:26.010711+00:00", "source": "github"}, "license_family": {"inputs": ["license"], "kind": "computed", "method": "license_family"}, "maturity": {"confidence": null, "enriched_at": "2026-08-30T06:56:50.209733+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "0fd3a4f1a87569395221eca58770e58e8ae6f47faa06d97ea216bb7ae3f62bfc", "fetched_at": "2026-08-28T04:03:26.010711+00:00", "kind": "readme", "missing": false, "url": "https://github.com/facebookarchive/emitter"}], "taxonomy_version": 1}, "member_repos": {"kind": "observed", "observed_at": "2026-08-28T04:03:26.010711+00:00", "source": "github"}, "name": {"kind": "observed", "observed_at": "2026-08-28T04:03:26.010711+00:00", "source": "github"}, "platform": {"confidence": null, "enriched_at": "2026-08-30T06:56:50.209733+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "0fd3a4f1a87569395221eca58770e58e8ae6f47faa06d97ea216bb7ae3f62bfc", "fetched_at": "2026-08-28T04:03:26.010711+00:00", "kind": "readme", "missing": false, "url": "https://github.com/facebookarchive/emitter"}], "taxonomy_version": 1}, "pushed_at": {"kind": "observed", "observed_at": "2026-08-28T04:03:26.010711+00:00", "source": "github"}, "repo": {"kind": "observed", "observed_at": "2026-08-28T04:03:26.010711+00:00", "source": "github"}, "stars": {"kind": "observed", "observed_at": "2026-08-28T04:03:26.010711+00:00", "source": "github"}, "tags": {"confidence": null, "enriched_at": "2026-08-30T06:56:50.209733+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "0fd3a4f1a87569395221eca58770e58e8ae6f47faa06d97ea216bb7ae3f62bfc", "fetched_at": "2026-08-28T04:03:26.010711+00:00", "kind": "readme", "missing": false, "url": "https://github.com/facebookarchive/emitter"}], "taxonomy_version": 1}, "topics": {"kind": "observed", "observed_at": "2026-08-28T04:03:26.010711+00:00", "source": "github"}, "urls": {"kind": "observed", "observed_at": "2026-08-28T04:03:26.010711+00:00", "source": "github"}, "use_cases": {"confidence": null, "enriched_at": "2026-08-30T06:56:50.209733+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "0fd3a4f1a87569395221eca58770e58e8ae6f47faa06d97ea216bb7ae3f62bfc", "fetched_at": "2026-08-28T04:03:26.010711+00:00", "kind": "readme", "missing": false, "url": "https://github.com/facebookarchive/emitter"}], "taxonomy_version": 1}, "what_it_is": {"confidence": null, "enriched_at": "2026-08-30T06:56:50.209733+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "0fd3a4f1a87569395221eca58770e58e8ae6f47faa06d97ea216bb7ae3f62bfc", "fetched_at": "2026-08-28T04:03:26.010711+00:00", "kind": "readme", "missing": false, "url": "https://github.com/facebookarchive/emitter"}], "taxonomy_version": 1}, "when_to_avoid": {"confidence": null, "enriched_at": "2026-08-30T06:56:50.209733+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "0fd3a4f1a87569395221eca58770e58e8ae6f47faa06d97ea216bb7ae3f62bfc", "fetched_at": "2026-08-28T04:03:26.010711+00:00", "kind": "readme", "missing": false, "url": "https://github.com/facebookarchive/emitter"}], "taxonomy_version": 1}, "when_to_choose": {"confidence": null, "enriched_at": "2026-08-30T06:56:50.209733+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "0fd3a4f1a87569395221eca58770e58e8ae6f47faa06d97ea216bb7ae3f62bfc", "fetched_at": "2026-08-28T04:03:26.010711+00:00", "kind": "readme", "missing": false, "url": "https://github.com/facebookarchive/emitter"}], "taxonomy_version": 1}}, "score": {"components": {"activity": 0, "longevity": 100, "rhythm": 35}, "computed_at": "2026-09-03T02:20:16.233290+00:00", "flags": ["no_releases", "archived", "no_license"], "formula": "round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)", "inputs": {"age_days": 4871, "days_push": 1889, "days_rel": null, "gap_med": null, "n_releases_24m": 0}, "score": 10, "version": 2}, "staleness": {"enrichment_outdated": false, "low_confidence": false, "scrape_days": 9, "stale_scrape": false}}