{"adoption": {"forks": 424, "observed_at": "2026-08-28T04:10:28.312456+00:00", "stars": 9091}, "canonical_url": "https://ross.abutalabs.com/products/gremlinsjs", "card": {"archived": false, "artifact_type": "library", "description": "Monkey testing library for web apps and Node.js", "domain": ["testing", "web-development", "frontend", "developer-tools"], "enriched": true, "function": ["testing", "fuzzing", "benchmarking"], "health_score": 20, "homepage": "https://marmelab.com/blog/2020/06/02/gremlins-2.html", "language": "JavaScript", "license": "MIT", "license_family": "permissive", "maturity": "maintenance", "member_repos": ["marmelab/gremlins.js"], "name": "marmelab/gremlins.js", "platform": ["browser"], "pushed_at": "2023-03-06T22:42:44+00:00", "repo": "marmelab/gremlins.js", "stars": 9091, "tags": ["monkey-testing", "chaos-testing", "stress-testing", "bookmarklet", "cypress", "playwright", "nodejs", "javascript"], "topics": ["test", "fuzz-testing", "frontend"], "urls": [], "use_cases": ["stress test a web app with random clicks and typing", "detect memory leaks in frontend JavaScript", "find unhandled errors in a web application", "run chaos/monkey testing in Cypress or Playwright", "check robustness of an HTML5 app before release"], "what_it_is": "gremlins.js is a JavaScript monkey testing library for Node.js and the browser that unleashes random user-like actions (clicking, typing, scrolling, form filling, touching) on a web app to test its robustness. It includes 'mogwai' watchers that monitor console errors and frame rates to detect errors, performance problems, and memory leaks.", "when_to_avoid": ["you need deterministic, assertion-based unit or e2e tests", "you are testing non-browser backend code", "you need actively maintained tooling with frequent updates"], "when_to_choose": ["you want randomized, unscripted stress testing of a browser-based frontend", "you need to surface crashes, console errors, or performance degradation from unpredictable user behavior", "you want a lightweight library that integrates with Cypress or Playwright"]}, "data_as_of": "2026-08-30T08:39:29.467469+00:00", "members": [{"path": "/products/gremlinsjs", "repo": "marmelab/gremlins.js", "role": "main", "score": 23}], "provenance": {"archived": {"kind": "observed", "observed_at": "2026-08-28T04:10:28.312456+00:00", "source": "github"}, "artifact_type": {"confidence": null, "enriched_at": "2026-08-29T17:23:59.669386+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "6d3f85fb511b2e5c5808c0c6ca5f0c9525df1b438c52d5498392cda866b5237f", "fetched_at": "2026-08-28T04:10:28.312456+00:00", "kind": "readme", "missing": false, "url": "https://github.com/marmelab/gremlins.js"}, {"content_hash": "08fa7c667aaf10950ddc3f1df39cab1a060a71d33bc256886424ef39d5cfe580", "fetched_at": "2026-08-29T08:24:05.458232+00:00", "kind": "homepage", "missing": false, "url": "https://marmelab.com/blog/2020/06/02/gremlins-2.html"}, {"content_hash": "f0fa97a067ce336c1e40fde8d666742fe176248334bbfdbddb269584e8a57906", "fetched_at": "2026-08-29T08:24:05.467954+00:00", "kind": "registry_npm", "missing": false, "url": "https://registry.npmjs.org/gremlins.js"}], "taxonomy_version": 1}, "description": {"kind": "observed", "observed_at": "2026-08-28T04:10:28.312456+00:00", "source": "github"}, "domain": {"confidence": null, "enriched_at": "2026-08-29T17:23:59.669386+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "6d3f85fb511b2e5c5808c0c6ca5f0c9525df1b438c52d5498392cda866b5237f", "fetched_at": "2026-08-28T04:10:28.312456+00:00", "kind": "readme", "missing": false, "url": "https://github.com/marmelab/gremlins.js"}, {"content_hash": "08fa7c667aaf10950ddc3f1df39cab1a060a71d33bc256886424ef39d5cfe580", "fetched_at": "2026-08-29T08:24:05.458232+00:00", "kind": "homepage", "missing": false, "url": "https://marmelab.com/blog/2020/06/02/gremlins-2.html"}, {"content_hash": "f0fa97a067ce336c1e40fde8d666742fe176248334bbfdbddb269584e8a57906", "fetched_at": "2026-08-29T08:24:05.467954+00:00", "kind": "registry_npm", "missing": false, "url": "https://registry.npmjs.org/gremlins.js"}], "taxonomy_version": 1}, "enriched": {"inputs": [], "kind": "computed", "method": "enrichment_status"}, "function": {"confidence": null, "enriched_at": "2026-08-29T17:23:59.669386+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "6d3f85fb511b2e5c5808c0c6ca5f0c9525df1b438c52d5498392cda866b5237f", "fetched_at": "2026-08-28T04:10:28.312456+00:00", "kind": "readme", "missing": false, "url": "https://github.com/marmelab/gremlins.js"}, {"content_hash": "08fa7c667aaf10950ddc3f1df39cab1a060a71d33bc256886424ef39d5cfe580", "fetched_at": "2026-08-29T08:24:05.458232+00:00", "kind": "homepage", "missing": false, "url": "https://marmelab.com/blog/2020/06/02/gremlins-2.html"}, {"content_hash": "f0fa97a067ce336c1e40fde8d666742fe176248334bbfdbddb269584e8a57906", "fetched_at": "2026-08-29T08:24:05.467954+00:00", "kind": "registry_npm", "missing": false, "url": "https://registry.npmjs.org/gremlins.js"}], "taxonomy_version": 1}, "health_score": {"inputs": ["days_since_push", "days_since_release", "archived"], "kind": "computed", "method": "health_v1"}, "homepage": {"kind": "observed", "observed_at": "2026-08-28T04:10:28.312456+00:00", "source": "github"}, "language": {"kind": "observed", "observed_at": "2026-08-28T04:10:28.312456+00:00", "source": "github"}, "license": {"kind": "observed", "observed_at": "2026-08-28T04:10:28.312456+00:00", "source": "github"}, "license_family": {"inputs": ["license"], "kind": "computed", "method": "license_family"}, "maturity": {"confidence": null, "enriched_at": "2026-08-29T17:23:59.669386+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "6d3f85fb511b2e5c5808c0c6ca5f0c9525df1b438c52d5498392cda866b5237f", "fetched_at": "2026-08-28T04:10:28.312456+00:00", "kind": "readme", "missing": false, "url": "https://github.com/marmelab/gremlins.js"}, {"content_hash": "08fa7c667aaf10950ddc3f1df39cab1a060a71d33bc256886424ef39d5cfe580", "fetched_at": "2026-08-29T08:24:05.458232+00:00", "kind": "homepage", "missing": false, "url": "https://marmelab.com/blog/2020/06/02/gremlins-2.html"}, {"content_hash": "f0fa97a067ce336c1e40fde8d666742fe176248334bbfdbddb269584e8a57906", "fetched_at": "2026-08-29T08:24:05.467954+00:00", "kind": "registry_npm", "missing": false, "url": "https://registry.npmjs.org/gremlins.js"}], "taxonomy_version": 1}, "member_repos": {"kind": "observed", "observed_at": "2026-08-28T04:10:28.312456+00:00", "source": "github"}, "name": {"kind": "observed", "observed_at": "2026-08-28T04:10:28.312456+00:00", "source": "github"}, "platform": {"confidence": null, "enriched_at": "2026-08-29T17:23:59.669386+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "6d3f85fb511b2e5c5808c0c6ca5f0c9525df1b438c52d5498392cda866b5237f", "fetched_at": "2026-08-28T04:10:28.312456+00:00", "kind": "readme", "missing": false, "url": "https://github.com/marmelab/gremlins.js"}, {"content_hash": "08fa7c667aaf10950ddc3f1df39cab1a060a71d33bc256886424ef39d5cfe580", "fetched_at": "2026-08-29T08:24:05.458232+00:00", "kind": "homepage", "missing": false, "url": "https://marmelab.com/blog/2020/06/02/gremlins-2.html"}, {"content_hash": "f0fa97a067ce336c1e40fde8d666742fe176248334bbfdbddb269584e8a57906", "fetched_at": "2026-08-29T08:24:05.467954+00:00", "kind": "registry_npm", "missing": false, "url": "https://registry.npmjs.org/gremlins.js"}], "taxonomy_version": 1}, "pushed_at": {"kind": "observed", "observed_at": "2026-08-28T04:10:28.312456+00:00", "source": "github"}, "repo": {"kind": "observed", "observed_at": "2026-08-28T04:10:28.312456+00:00", "source": "github"}, "stars": {"kind": "observed", "observed_at": "2026-08-28T04:10:28.312456+00:00", "source": "github"}, "tags": {"confidence": null, "enriched_at": "2026-08-29T17:23:59.669386+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "6d3f85fb511b2e5c5808c0c6ca5f0c9525df1b438c52d5498392cda866b5237f", "fetched_at": "2026-08-28T04:10:28.312456+00:00", "kind": "readme", "missing": false, "url": "https://github.com/marmelab/gremlins.js"}, {"content_hash": "08fa7c667aaf10950ddc3f1df39cab1a060a71d33bc256886424ef39d5cfe580", "fetched_at": "2026-08-29T08:24:05.458232+00:00", "kind": "homepage", "missing": false, "url": "https://marmelab.com/blog/2020/06/02/gremlins-2.html"}, {"content_hash": "f0fa97a067ce336c1e40fde8d666742fe176248334bbfdbddb269584e8a57906", "fetched_at": "2026-08-29T08:24:05.467954+00:00", "kind": "registry_npm", "missing": false, "url": "https://registry.npmjs.org/gremlins.js"}], "taxonomy_version": 1}, "topics": {"kind": "observed", "observed_at": "2026-08-28T04:10:28.312456+00:00", "source": "github"}, "urls": {"kind": "observed", "observed_at": "2026-08-28T04:10:28.312456+00:00", "source": "github"}, "use_cases": {"confidence": null, "enriched_at": "2026-08-29T17:23:59.669386+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "6d3f85fb511b2e5c5808c0c6ca5f0c9525df1b438c52d5498392cda866b5237f", "fetched_at": "2026-08-28T04:10:28.312456+00:00", "kind": "readme", "missing": false, "url": "https://github.com/marmelab/gremlins.js"}, {"content_hash": "08fa7c667aaf10950ddc3f1df39cab1a060a71d33bc256886424ef39d5cfe580", "fetched_at": "2026-08-29T08:24:05.458232+00:00", "kind": "homepage", "missing": false, "url": "https://marmelab.com/blog/2020/06/02/gremlins-2.html"}, {"content_hash": "f0fa97a067ce336c1e40fde8d666742fe176248334bbfdbddb269584e8a57906", "fetched_at": "2026-08-29T08:24:05.467954+00:00", "kind": "registry_npm", "missing": false, "url": "https://registry.npmjs.org/gremlins.js"}], "taxonomy_version": 1}, "what_it_is": {"confidence": null, "enriched_at": "2026-08-29T17:23:59.669386+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "6d3f85fb511b2e5c5808c0c6ca5f0c9525df1b438c52d5498392cda866b5237f", "fetched_at": "2026-08-28T04:10:28.312456+00:00", "kind": "readme", "missing": false, "url": "https://github.com/marmelab/gremlins.js"}, {"content_hash": "08fa7c667aaf10950ddc3f1df39cab1a060a71d33bc256886424ef39d5cfe580", "fetched_at": "2026-08-29T08:24:05.458232+00:00", "kind": "homepage", "missing": false, "url": "https://marmelab.com/blog/2020/06/02/gremlins-2.html"}, {"content_hash": "f0fa97a067ce336c1e40fde8d666742fe176248334bbfdbddb269584e8a57906", "fetched_at": "2026-08-29T08:24:05.467954+00:00", "kind": "registry_npm", "missing": false, "url": "https://registry.npmjs.org/gremlins.js"}], "taxonomy_version": 1}, "when_to_avoid": {"confidence": null, "enriched_at": "2026-08-29T17:23:59.669386+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "6d3f85fb511b2e5c5808c0c6ca5f0c9525df1b438c52d5498392cda866b5237f", "fetched_at": "2026-08-28T04:10:28.312456+00:00", "kind": "readme", "missing": false, "url": "https://github.com/marmelab/gremlins.js"}, {"content_hash": "08fa7c667aaf10950ddc3f1df39cab1a060a71d33bc256886424ef39d5cfe580", "fetched_at": "2026-08-29T08:24:05.458232+00:00", "kind": "homepage", "missing": false, "url": "https://marmelab.com/blog/2020/06/02/gremlins-2.html"}, {"content_hash": "f0fa97a067ce336c1e40fde8d666742fe176248334bbfdbddb269584e8a57906", "fetched_at": "2026-08-29T08:24:05.467954+00:00", "kind": "registry_npm", "missing": false, "url": "https://registry.npmjs.org/gremlins.js"}], "taxonomy_version": 1}, "when_to_choose": {"confidence": null, "enriched_at": "2026-08-29T17:23:59.669386+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "6d3f85fb511b2e5c5808c0c6ca5f0c9525df1b438c52d5498392cda866b5237f", "fetched_at": "2026-08-28T04:10:28.312456+00:00", "kind": "readme", "missing": false, "url": "https://github.com/marmelab/gremlins.js"}, {"content_hash": "08fa7c667aaf10950ddc3f1df39cab1a060a71d33bc256886424ef39d5cfe580", "fetched_at": "2026-08-29T08:24:05.458232+00:00", "kind": "homepage", "missing": false, "url": "https://marmelab.com/blog/2020/06/02/gremlins-2.html"}, {"content_hash": "f0fa97a067ce336c1e40fde8d666742fe176248334bbfdbddb269584e8a57906", "fetched_at": "2026-08-29T08:24:05.467954+00:00", "kind": "registry_npm", "missing": false, "url": "https://registry.npmjs.org/gremlins.js"}], "taxonomy_version": 1}}, "score": {"components": {"activity": 0, "longevity": 100, "rhythm": 8}, "computed_at": "2026-09-03T02:20:16.233290+00:00", "flags": [], "formula": "round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)", "inputs": {"age_days": 4699, "days_push": 1276, "days_rel": null, "gap_med": null, "n_releases_24m": 0}, "score": 23, "version": 2}, "staleness": {"enrichment_outdated": false, "low_confidence": false, "scrape_days": 9, "stale_scrape": false}}