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Development Timeline
7 chapters · AI-identified milestones
Chapter 1Nov 2016 – Mar 2018
Chapter 1: November 2016
0 commits were made during this phase of development.
0 commits
v15.4.1, v15.4.2, v15.5.0
Chapter 2Mar 2018 – Feb 2019
Chapter 2: March 2018
0 commits were made during this phase of development.
0 commits
v16.3.0, v16.3.1, v16.3.2
Chapter 3Feb 2019 – Feb 2020
Chapter 3: February 2019
0 commits were made during this phase of development.
0 commits
v16.8.1, v16.8.2, v16.8.3
Chapter 4Feb 2020 – Dec 2024
Chapter 4: February 2020
0 commits were made during this phase of development.
0 commits
16.13.0 (February 26, 2020), 16.13.1 (March 19, 2020), 15.7.0 (October 14, 2020)
Chapter 5Dec 2024 – Jan 2026
Chapter 5: December 2024
105 commits were made during this phase of development.
105 commits
19.0.0 (December 5, 2024), 19.1.0 (March 28, 2025), 19.1.1 (July 28, 2025)
New:
+3 more
Key commits
[DevTools] hotkey to start/stop profiling (#35160)[compiler] Ignore ESLint suppressions when ValidateMemoDeps enabled (#35184)[compiler] Allow nonreactive stable types as extraneous deps (#35185)[compiler] Allow manual dependencies to have different optionality than inferred deps (#35186)[compiler] Allow extraneous non-reactive locals (#35190)Chapter 6Jan 2026 – Jul 2026
Chapter 6: January 2026
290 commits were made during this phase of development.
290 commits
19.1.5 (January 26th, 2026), 19.2.4 (January 26th, 2026), 19.0.5 (April 8th, 2026)
New:
![dependabot[bot]](https://avatars.githubusercontent.com/in/29110?v=4)
+2 more
Key commits
[flags] make enableComponentPerformanceTrack static everywhere (#35629)
[Flight] Add more DoS mitigations to Flight Reply, and harden Flight (#35632)[Flight] Fix react-markup types for server references (#35634)[tests] remove withoutStack from assertConsole helpers (#35498)[Perf Tracks] Handle arrays with bigints in deep objects (#35648)Chapter 7Jul 2026 – Sep 2026
Chapter 7: July 2026
104 commits were made during this phase of development.
104 commits
19.1.9 (July 21st, 2026), 19.2.8 (July 21st, 2026), 19.3.0 (September 9, 2026)
New:
Languages
Key commits
[FlightReply] Performance improvements when decoding (#37090)
[Flight] Limit fake JSX call site stacks to 10 frames (#37086)
[react-server-dom-turbopack] Support experimental array format for chunks (#37095)[DevTools] Harden Bridge and Wall lifecycle types (#37049)[DevTools] Shut down standalone Bridge on socket close (#37076)500 commits across 7 chapters
Last push: Sep 2026