getify/You-Dont-Know-JS

A book series (2 published editions) on the JS language.

184.8k stars · 33.4k forks

This repo isn't software code, so code checks are limited.

Healthy

Healthy: no known risks in the checks that ran.

Why

No rule fired.

What would change this

Partly checked: people (Only 2 human commits were found, too few to judge who maintains the project.)
A dormant maintenance status, a deprecated or archived package, a successor link, or a critical advisory would change this.

Maintenance

Complete

Steady

Human commits, 30 days: 0
Human commits, 90 days: 0
Human commits, 365 days: 2
Bot share of commits, 365 days: 0%
Last commit: Jan 18, 2026 (8 months ago)
Last human commit: Jan 18, 2026 (8 months ago)
Authors, 90 days: 0
Last release: none found
Median PR merge time: 3 hours

Responsiveness: of 0 recent issues, n/a got a maintainer reply. Median first response: n/a.

Only 0 recent issues can be checked for a response, too few to measure response time.

Sources: Commits, Releases, Merged pull requests, Issues

People

Partial

Owner: Personal account
Commits sampled: 2 since Oct 14, 2025
Authors for half of commits: 1
Authors for 80% of commits: 1
Contributors: 180

Top committers

getify: 100% of commits

Only 2 human commits were found, too few to judge who maintains the project.

Sources: Commits, Contributors

Stars

Complete

Organic, confidence high

Bars show stars gained each week. Orange bars overlap a burst.

Bursts

Feb 14, 2014 to Feb 21, 2014: about 533 more stars than usual, peak 179 in one day, a spike that tapers off. Outside explanation: a jump in issues and pull requests.
Jun 29, 2014 to Jul 1, 2014: about 134 more stars than usual, peak 74 in one day, a spike that tapers off. Outside explanation: a jump in issues and pull requests.
Oct 20, 2014 to Oct 31, 2014: about 2.3k more stars than usual, peak 878 in one day, a spike that tapers off. Outside explanation: a Hacker News post.
Feb 16, 2015 to Feb 27, 2015: about 1.8k more stars than usual, peak 764 in one day, a spike that tapers off. Outside explanation: a jump in issues and pull requests.
Apr 15, 2015 to Apr 22, 2015: about 341 more stars than usual, peak 103 in one day, a spike that tapers off. Outside explanation: a jump in issues and pull requests.
Jun 16, 2015 to Jun 19, 2015: about 330 more stars than usual, peak 163 in one day, a spike that tapers off. Outside explanation: a jump in issues and pull requests.
Dec 16, 2015 to Dec 17, 2015: about 119 more stars than usual, peak 114 in one day, a spike that tapers off. Outside explanation: a jump in issues and pull requests.
Jun 23, 2016 to Jul 7, 2016: about 2.6k more stars than usual, peak 917 in one day, a shape we can't classify. Outside explanation: a Hacker News post, a jump in issues and pull requests.
Nov 2, 2016 to Nov 3, 2016: about 92 more stars than usual, peak 110 in one day, a spike that tapers off. No outside explanation found, so this burst is unexplained.
Dec 29, 2016 to Dec 30, 2016: about 250 more stars than usual, peak 217 in one day, a spike that tapers off. Outside explanation: a jump in issues and pull requests.
Mar 27, 2017 to Apr 3, 2017: about 699 more stars than usual, peak 245 in one day, a spike that tapers off. Outside explanation: a jump in issues and pull requests.
May 21, 2017 to May 26, 2017: about 514 more stars than usual, peak 211 in one day, a spike that tapers off. Outside explanation: a jump in issues and pull requests.
Dec 4, 2017 to Dec 5, 2017: about 119 more stars than usual, peak 142 in one day, a spike that tapers off. No outside explanation found, so this burst is unexplained.
Jun 2, 2019 to Jun 4, 2019: about 166 more stars than usual, peak 141 in one day, a spike that tapers off. We couldn't check for an outside explanation.
Aug 19, 2019 to Aug 20, 2019: about 118 more stars than usual, peak 138 in one day, a spike that tapers off. We couldn't check for an outside explanation.
Oct 2, 2019 to Oct 3, 2019: about 89 more stars than usual, peak 107 in one day, a spike that tapers off. Outside explanation: a jump in issues and pull requests.
Oct 6, 2019 to Oct 7, 2019: about 94 more stars than usual, peak 104 in one day, a spike that tapers off. We couldn't check for an outside explanation.
Oct 15, 2019 to Oct 16, 2019: about 145 more stars than usual, peak 117 in one day, a spike that tapers off. Outside explanation: a jump in issues and pull requests.
Nov 22, 2019 to Nov 22, 2019: about 117 more stars than usual, peak 161 in one day, a spike that tapers off. We couldn't check for an outside explanation.
Dec 9, 2019 to Dec 12, 2019: about 339 more stars than usual, peak 187 in one day, a spike that tapers off. Outside explanation: a jump in issues and pull requests.
Jan 12, 2020 to Jan 17, 2020: about 559 more stars than usual, peak 230 in one day, a spike that tapers off. Outside explanation: a jump in issues and pull requests.
Feb 3, 2020 to Feb 6, 2020: about 385 more stars than usual, peak 196 in one day, a spike that tapers off. Outside explanation: a jump in issues and pull requests.
Feb 19, 2020 to Feb 21, 2020: about 214 more stars than usual, peak 189 in one day, a spike that tapers off. Outside explanation: a jump in issues and pull requests.
May 24, 2020 to May 30, 2020: about 461 more stars than usual, peak 154 in one day, a shape we can't classify. Outside explanation: a jump in issues and pull requests.
Aug 3, 2020 to Aug 4, 2020: about 98 more stars than usual, peak 109 in one day, a spike that tapers off. We couldn't check for an outside explanation.
Aug 9, 2020 to Aug 10, 2020: about 131 more stars than usual, peak 129 in one day, a spike that tapers off. We couldn't check for an outside explanation.
Sep 9, 2020 to Sep 10, 2020: about 155 more stars than usual, peak 122 in one day, a spike that tapers off. We couldn't check for an outside explanation.
Oct 5, 2020 to Oct 8, 2020: about 295 more stars than usual, peak 131 in one day, a shape we can't classify. Outside explanation: a jump in issues and pull requests.
Dec 2, 2020 to Dec 8, 2020: about 342 more stars than usual, peak 153 in one day, a spike that tapers off. We couldn't check for an outside explanation.
Dec 21, 2020 to Dec 21, 2020: about 99 more stars than usual, peak 143 in one day, a spike that tapers off. Outside explanation: a jump in issues and pull requests.
Mar 29, 2021 to Mar 31, 2021: about 151 more stars than usual, peak 109 in one day, a spike that tapers off. We couldn't check for an outside explanation.
Apr 26, 2021 to Apr 29, 2021: about 318 more stars than usual, peak 177 in one day, a spike that tapers off. We couldn't check for an outside explanation.
Dec 18, 2021 to Dec 18, 2021: about 54 more stars than usual, peak 83 in one day, a spike that tapers off. We couldn't check for an outside explanation.
Mar 29, 2022 to Mar 31, 2022: about 203 more stars than usual, peak 131 in one day, a flat block of stars. We couldn't check for an outside explanation.
May 15, 2022 to May 18, 2022: about 333 more stars than usual, peak 146 in one day, a flat block of stars. We couldn't check for an outside explanation.
Aug 21, 2022 to Aug 22, 2022: about 165 more stars than usual, peak 139 in one day, a spike that tapers off. We couldn't check for an outside explanation.
Sep 24, 2022 to Sep 25, 2022: about 88 more stars than usual, peak 85 in one day, a spike that tapers off. We couldn't check for an outside explanation.
Jan 30, 2023 to Jan 31, 2023: about 84 more stars than usual, peak 98 in one day, a spike that tapers off. We couldn't check for an outside explanation.
Jun 11, 2023 to Jun 12, 2023: about 86 more stars than usual, peak 98 in one day, a spike that tapers off. We couldn't check for an outside explanation.
Jul 17, 2023 to Jul 18, 2023: about 92 more stars than usual, peak 99 in one day, a spike that tapers off. We couldn't check for an outside explanation.
Aug 7, 2023 to Aug 8, 2023: about 71 more stars than usual, peak 78 in one day, a spike that tapers off. We couldn't check for an outside explanation.
Sep 27, 2023 to Oct 3, 2023: about 318 more stars than usual, peak 95 in one day, a shape we can't classify. Outside explanation: a jump in issues and pull requests.
Mar 7, 2024 to Mar 8, 2024: about 69 more stars than usual, peak 71 in one day, a spike that tapers off. We couldn't check for an outside explanation.
Jan 7, 2025 to Jan 9, 2025: about 80 more stars than usual, peak 50 in one day, a flat block of stars. We couldn't check for an outside explanation.

11 stars GitHub has since removed (tracked since Oct 13, 2026).

Anyone can buy stars for any repo; bursts alone don't prove the owner did.

The star history looks organic.
Engagement is not compared for non-code or mirror repositories.

Sources: How star history is analyzed

Risk

Complete

Flags

Info: The OpenSSF Scorecard for this project is 2.4 out of 10 (deps.dev). Details

License

Now: No license found
A year ago: Not known

Packages

No published packages found.

OpenSSF Scorecard: 2.4 out of 10 (via deps.dev).

Sources: GitHub: getify/You-Dont-Know-JS

Badge

Add this to a README to show the current verdict:

[![RepoRadar](https://reporadar.ai/getify/You-Dont-Know-JS/badge.svg)](https://reporadar.ai/getify/You-Dont-Know-JS)

Earlier verdicts

Oct 14, 2026: Healthy
Oct 13, 2026: Healthy
Oct 13, 2026: Healthy

Computed 20 hours ago · method 2026.10.2