Standard Library
C-Rank Grade: B (Solid) - 42/100
External PR Merge Rate: 42%
Response Time: 5d
First Timer Success: 50%
zloirock/core-js has a recorded first-timer success rate of 50.0%. Repositories ranked B typically provide actionable feedback during code reviews and actively nurture new community contributors.
Maintainers in zloirock/core-js respond to incoming external pull requests in approximately 121.5 hours on average. Keeping PRs focused on single tasks and ensuring tests pass helps maintainers review faster.
The C-Rank™ system evaluates GitHub projects on a 0–100 scale using real data: PR merge rates, review turnaround time, active maintainer presence, and first-time contributor success. A score of 42.0 places zloirock/core-js in the B tier.
The external contributor pull request merge rate for zloirock/core-js is 42.3%, based on public PR activity from non-core contributors.
zloirock/core-js currently has 2 active issue(s) tagged with beginner-friendly labels like "good first issue", "beginner", or "up-for-grabs".
Balanced & professional review environment in zloirock/core-js. Maintains strict focus on technical quality and test standards.
Average Response Latency
Tracks hours until a maintainer leaves a review, comment, or PR response.
External Acceptance Rate
Percentage of community pull requests successfully merged into main.
First PR Conversion
Rate at which developers submitting their first repository PR succeed.
Show contributors that your repository actively reviews and merges external pull requests.
[](https://getmerged.abhishekco.de/zloirock/core-js?utm_source=github&utm_medium=badge)
Historical health & responsiveness evolution
External PR acceptance
First PR success rate
50% receive response in
90% receive response in
Maintainer review activity heatmap & prime window prediction
Calculating local time...
Calculating local time...
Detected: UTC
Maintainers are most responsive around 16:00 UTC (16:00 UTC in your timezone). Recommended submission window is Monday - Wednesday from 14:00 to 18:00 UTC (14:00 - 18:00 UTC local).
Limited recent maintainer review activity recorded for this repository. Prediction based on heuristic baseline.
Maintainer Strategy: Maintainer Sweet Spot: PRs under 150 lines merge in ~79 hours (53% approval). Large PRs (>500 lines) take ~583 hours (19% approval). Keep your diff compact for rapid review.
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Visual print designer for Frappe / ERPNext
Is there plans to support requestAnimationFrame? The polyfill plans, if planned I propose to be as follows--- Ancient webkit and firefox: redirect to mozRAF, webkitRAF (RAF is abbreviated) / mozCAF, webkit CRAF, etc. Older broswers / node: Store a list of callbacks, pump them every 16ms (so all usages of RAF animates at the same time)
execute: const test = new RegExp('.', 'd'); output: Uncaught SyntaxError: Invalid flags supplied to RegExp constructor 'd' at new RegExp () at :1:14 (anonymous) @ VM524:1 https://github.com/tc39/proposal-regexp-match-indices
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When evaluating whether to contribute to zloirock/core-js, response velocity and maintainer engagement are crucial. GetMerged continuously tracks pull request trajectories, first-comment latency, and code review rounds to help developers avoid submitting pull requests to backlogged repositories.
Currently, maintainers of zloirock/core-js acknowledge new external contributions in approximately 5 days+. Out of all submitted pull requests from non-core authors in the last 180-day window, 42.3% were successfully merged into the primary branch.
zloirock/core-js has a recorded first-timer success rate of 50.0%. Repositories ranked Solid typically provide actionable feedback during code reviews and actively nurture new community contributors.
The initial maintainer response time averages ~5 days+. Keeping PRs scoped to single concerns and ensuring CI checks succeed will optimize review turnaround.
The C-Rank™ index scores repositories on a 0 to 100 scale using an objective formula: external PR merge rates, initial response speed, active maintainer count, and first-time contributor retention. A score of 42.0 places zloirock/core-js in the Solid tier.
The external pull request merge rate is 42.3%. GetMerged isolates non-core community contributions so external developers get an accurate benchmark of PR acceptance probability.
Yes, zloirock/core-js currently has 2 active issue(s) tagged with beginner-friendly labels. You can inspect these directly from the repository issues tab.
All metrics displayed for zloirock/core-js are automatically retrieved via the public GitHub API and recalculated daily. Insider pull requests submitted by repository owners or organization members are excluded from merge rate calculations to preserve objective external contributor statistics.