npm
happy-dom
Happy DOM is a JavaScript implementation of a web browser without its graphical user interface. It includes many web standards from WHATWG DOM and HTML.
angularbrowserbundomhacktoberfesthacktoberfest2025htmljavascript
Release cadenceEvery 2 days
Last releaseOct 20, 2026
Open advisories0
Changelog quality91% curated
GitHub Releases, gaps for some releases
Release history SecurityYou're on
456 older or filtered releases not shown.
Upgrade guides
Breaking changes and a migration checklist for each major versionhappy-dom 20 → 2120.14.6 → 21.0.4Oct 20, 2026 BreakingBreaking1Security6Deprecated1New2happy-dom 19 → 2019.0.2 → 20.14.6Oct 8, 2026 UnknownSecurity5New32Changed2Fixed94Other4happy-dom 18 → 1918.0.1 → 19.0.2Sep 29, 2025 BreakingBreaking2New15Changed1Fixed6happy-dom 17 → 1817.6.3 → 18.0.1Jun 10, 2025 BreakingBreaking2New3Fixed1happy-dom 16 → 1716.8.1 → 17.6.3Jun 4, 2025 BreakingBreaking1New17Fixed46happy-dom 15 → 1615.11.7 → 16.8.1Jan 31, 2025 BreakingBreaking1New10Fixed29happy-dom 14 → 1514.12.3 → 15.11.7Nov 28, 2024 BreakingBreaking2Security1New33Fixed51happy-dom 13 → 1413.10.1 → 14.12.3Jun 20, 2024 BreakingBreaking1New14Fixed35happy-dom 12 → 1312.10.3 → 13.10.1Mar 18, 2024 BreakingBreaking1New33Fixed59happy-dom 11 → 1211.2.0 → 12.10.3Oct 27, 2023 BreakingBreaking1New17Fixed20happy-dom 10 → 1110.11.2 → 11.2.0Sep 14, 2023 BreakingBreaking2New3Fixed9happy-dom 9 → 109.20.3 → 10.11.2Aug 29, 2023 BreakingBreaking1New14Fixed20happy-dom 8 → 98.9.0 → 9.20.3May 23, 2023 BreakingBreaking1New84Fixed51happy-dom 7 → 87.8.1 → 8.9.0Feb 25, 2023 BreakingBreaking1New11Fixed22happy-dom 6 → 76.0.4 → 7.8.1Dec 7, 2022 BreakingBreaking2New21Fixed35happy-dom 5 → 65.4.0 → 6.0.4Jul 17, 2022 BreakingBreaking1New4Fixed6happy-dom 4 → 54.1.0 → 5.4.0Jun 30, 2022 BreakingBreaking1New4Fixed4happy-dom 3 → 43.2.2 → 4.1.0May 25, 2022 BreakingBreaking1New1Fixed3happy-dom 2 → 32.55.0 → 3.2.2May 16, 2022 BreakingBreaking2New4Fixed3Other1happy-dom 1 → 21.18.2 → 2.55.0Mar 31, 2022 BreakingBreaking1Platform1New86Changed2Fixed57happy-dom 0.14 → 10.14.1 → 1.18.2Nov 23, 2020 BreakingBreaking1New52Fixed31happy-dom 0.13 → 0.140.13.0 → 0.14.1May 14, 2020 Unknownhappy-dom 0.12 → 0.130.12.1 → 0.13.0May 2, 2020 Unknownhappy-dom 0.11 → 0.120.11.1 → 0.12.1Jan 30, 2020 UnknownNew1happy-dom 0.10 → 0.110.10.8 → 0.11.1Jan 30, 2020 SafeNew1Fixed1happy-dom 0.9 → 0.100.9.0 → 0.10.8Jan 28, 2020 UnknownNew1Fixed2happy-dom 0.8 → 0.90.8.6 → 0.9.0Nov 26, 2019 SafeNew1happy-dom 0.7 → 0.80.7.0 → 0.8.6Nov 25, 2019 UnknownNew1Fixed3happy-dom 0.6 → 0.70.6.4 → 0.7.0Nov 21, 2019 Unknownhappy-dom 0.5 → 0.60.5.2 → 0.6.4Oct 28, 2019 Unknownhappy-dom 0.4 → 0.50.4.11 → 0.5.2Oct 24, 2019 UnknownNew1happy-dom 0.3 → 0.40.3.1 → 0.4.11Oct 21, 2019 UnknownNew1Fixed4happy-dom 0.2 → 0.30.2.15 → 0.3.1Oct 7, 2019 SafeNew1Fixed1happy-dom 0.1 → 0.20.1.0 → 0.2.15Oct 6, 2019 UnknownNew1happy-dom 0.0 → 0.10.0.3 → 0.1.0Sep 20, 2019 SafeNew1
VersionChannelDateChangesSecurity
21.0.4 StableOct 20, 2026Security3Fix21.0.3 StableOct 15, 2026Security121.0.2 StableOct 15, 2026Security121.0.1 StableOct 12, 2026New121.0.0 StableOct 11, 2026Breaking1Security1Deprecated1New120.14.6 youStableOct 8, 2026Security120.14.5 StableSep 12, 2026Fixed120.14.4 StableSep 12, 2026Fixed120.14.3 StableSep 9, 2026Fixed120.14.2 StableSep 9, 2026Fixed120.14.1 StableSep 9, 2026Fixed120.14.0 StableSep 3, 2026Changed120.13.2 StableSep 2, 2026Fixed120.13.1 StableSep 2, 2026Fixed120.13.0 StableSep 2, 2026New120.12.2 StableSep 2, 2026Fixed120.12.1 StableSep 1, 2026New2Fixed1Other120.12.0 StableAug 29, 2026New220.11.15 StableAug 28, 2026Fixed120.11.14 StableAug 28, 2026Fixed2