Upgrade codebase to latest React, Redux, and TS

[markerikson]

This PR:

• Updates React to latest 19 experimental, RTK to 2.x, and TS to 5.9
• Updates other ecosystem packages to latest to pick up React 19 compat types
• Updates the TS target settings to match modern usages
• Fixes assorted TS compat issue with the new React and Redux types
• Updates our legacy Activity experimental references to use the prod Activity component

[vercel]

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Project	Deployment	Actions	Updated (UTC)
devtools	Ready	Preview, Comment	Feb 27, 2026 0:11am

[socket-security]

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	@​types/​prop-types@​15.7.15
	@​types/​react-dom@​18.0.5 ⏵ 19.2.3			+1
	suspense@​0.1.0
	@​types/​react@​18.0.12 ⏵ 19.2.14	+1		+2
	@​headlessui/​react@​1.6.4 ⏵ 2.2.9	-1		+1
	immer@​9.0.15 ⏵ 11.1.4	+1		+1
	react@​0.0.0-experimental-03d6f7cf0-20240209 ⏵ 0.0.0-experimental-98ce535f-20260226	+1			+1
	react-redux@​8.0.2 ⏵ 9.2.0	+2		+1
	@​testing-library/​dom@​8.13.0 ⏵ 10.4.1
	@​testing-library/​react@​13.3.0 ⏵ 16.3.2
	@​reduxjs/​toolkit@​1.8.4 ⏵ 2.11.2	-3		+1	-2
	react-dom@​0.0.0-experimental-03d6f7cf0-20240209 ⏵ 0.0.0-experimental-98ce535f-20260226	+1		+1	+1
	framer-motion@​6.3.11 ⏵ 12.34.3	-2		+4
	react-is@​0.0.0-experimental-98ce535f-20260226

View full report

[replay-io]

E2E Tests

Status	Complete ↗︎
Commit	b7f5806
Results	❌ 43 Failed authenticated/logpoints-01: Shared logpoints functionality (Replay 1, Replay 2, Replay 3, Replay 4) authenticated/passport-01: Time travel (Replay 1, Replay 2, Replay 3, Replay 4) authenticated/passport-02: Infrared inspection (Replay 1, Replay 2, Replay 3, Replay 4) authenticated/passport-03: Swiss army knife (Replay 1, Replay 2, Replay 3, Replay 4) console_async: support console evaluations in async frames (Replay 1, Replay 2, Replay 3, Replay 4) console_warp-01: should support warping to console messages (Replay 1, Replay 2, Replay 3, Replay 4) focus_mode-01: should filter messages as regions based on the active focus mode (Replay 1, Replay 2, Replay 3, Replay 4) inspector-computed-01: Basic computed styles can be viewed (Replay 1, Replay 2, Replay 3, Replay 4) inspector-computed-02: Complex computed styles can be viewed (Replay 1, Replay 2, Replay 3, Replay 4) inspector-elements-01: Basic DOM tree node display (Replay 1, Replay 2, Replay 3, Replay 4) jump-to-code-01: Test basic jumping functionality (Replay 1, Replay 2, Replay 3, Replay 4) jump-to-code-02: Redux J2C functionality (Replay 1, Replay 2, Replay 3, Replay 4) logpoints-01: log-points appear in the correct order and allow time warping (Replay 1, Replay 2, Replay 3, Replay 4) logpoints-02: conditional log-points (Replay 1, Replay 2, Replay 3, Replay 4) logpoints-05: should auto-complete based on log point location (Replay 1, Replay 2, Replay 3, Replay 4) logpoints-06: should be temporarily disabled (Replay 1, Replay 2, Replay 3, Replay 4) logpoints-07: should use the correct scope in auto-complete (Replay 1, Replay 2, Replay 3, Replay 4) logpoints-08: should support jumping directly to a hit point via the capsule input (Replay 1, Replay 2, Replay 3, Replay 4) logpoints-09: should support pending edits (Replay 1, Replay 2, Replay 3, Replay 4) logpoints-10: too-many-points-to-find UX (Replay 1, Replay 2, Replay 3, Replay 4) logpoints-11: too-many-points-to-run-analysis UX (Replay 1, Replay 2, Replay 3, Replay 4) logpoints-12: should auto save when removing conditions (Replay 1, Replay 2, Replay 3, Replay 4) logpoints-13: Test log point in a sourcemapped file (Replay 1, Replay 2, Replay 3, Replay 4) network-03: should sync and display the current time in relation to the network requests (Replay 1, Replay 2, Replay 3, Replay 4) node_control_flow: catch, finally, generators, and async/await (Replay 1, Replay 2, Replay 3, Replay 4) node_logpoint-01: Basic node logpoints (Replay 1, Replay 2, Replay 3, Replay 4) node_quick_open_modal-01: Test basic searching functionality (Replay 1, Replay 2, Replay 3, Replay 4) node_worker-01: make sure node workers don't cause crashes (Replay 1, Replay 2, Replay 3, Replay 4) object_preview-03: Test previews when switching between frames and stepping (Replay 1, Replay 2, Replay 3, Replay 4) object_preview-04: Test scope mapping and switching between generated/original sources (Replay 1, Replay 2, Replay 3, Replay 4) object_preview-07: inspect objects in the console while paused somewhere else (Replay 1, Replay 2, Replay 3, Replay 4) react_devtools-01: Basic RDT behavior (Replay 1, Replay 2, Replay 3, Replay 4) react_devtools-02: RDT integrations (Chromium) (Replay 1, Replay 2, Replay 3, Replay 4) react_devtools-03: process and display multiple React versions in page (Replay 1, Replay 2, Replay 3, Replay 4) react_devtools-04: Component selection is maintained when seeking to a new point (Replay 1, Replay 2, Replay 3, Replay 4) repaint-01: repaints the screen screen when stepping over code that modifies the DOM (Replay 1, Replay 2, Replay 3, Replay 4) source-line-highlights: Test source line highlighting (Replay 1, Replay 2, Replay 3, Replay 4) stepping-01: Test basic step-over/back functionality (Replay 1, Replay 2, Replay 3, Replay 4) stepping-02: Test fixes for some simple stepping bugs (Replay 1, Replay 2, Replay 3, Replay 4) stepping-04: Test stepping in a frame other than the top frame (Replay 1, Replay 2, Replay 3, Replay 4) stepping-05: Test stepping in pretty-printed code (Replay 1, Replay 2, Replay 3, Replay 4) stepping-06: Test stepping in async frames and async call stacks (Replay 1, Replay 2, Replay 3, Replay 4) stepping-07: Test quick stepping using the keyboard (Replay 1, Replay 2, Replay 3, Replay 4) ✅ 58 Passed async-stack: should detect async stacks outside the focus window authenticated/comments-01: Test add, edit, and delete comment functionality authenticated/comments-02: Test shared comments and replies (Replay 1, Replay 2) authenticated/comments-03: Comment previews authenticated/passport-04: Multiplayer console_dock: Should show the correct docking behavior for recordings with video console_errors: Test that errors and warnings from various sources are shown in the console console_eval: support console evaluations console_warp-02: support pausing, warping, stepping and evaluating console messages console-expressions-01: should cache input eager eval and terminal expressions per instance cypress-01: Basic Test Suites panel functionality cypress-02: Test Step timeline behavior cypress-03: Test Step interactions cypress-04: Test Step buttons and menu item cypress-05: Test DOM node preview on user action step hover deleted-recording: Show error message for deleted recording elements-search: Element panel should support basic and advanced search modes fe-1875 :: verify that steps go to the right point in time file-search-01: should search files highlighter: element highlighter works everywhere inspector-elements-02_node-picker: element picker and iframe behavior inspector-elements-03: Nested node picker and selection behavior inspector-elements-04: Keyboard shortcuts should select the right DOM nodes inspector-elements-05_search: element picker and iframe behavior inspector-rules-01: Basic CSS rules should be viewed inspector-rules-03: Shorthand CSS rules should be viewed logpoints-03: should display event properties in the console logpoints-04: should display exceptions in the console network-01: should filter requests by type and text network-02: should show details for the selected request node_console_dock: Should show the correct docking behavior for recordings without video node_console-01: Basic node console behavior node_console-02: uncaught exceptions should show up node_object_preview: Showing console objects in node node_spawn: Basic subprocess spawning node_stepping-01: Test stepping in async frames and async call stacks object_preview-01: expressions in the console after time warping object_preview-02: should allow objects in scope to be inspected object_preview-05: Should support logging objects as values object_preview-06: HTML elements object_preview-08: should render ellipsis for collapsed objects with truncated properties playwright-01: Basic Test Suites panel functionality playwright-02: Test Step timeline behavior playwright-03: Test Step interactions playwright-04: Test Step buttons and menu item playwright-05: Test DOM node previews on user action step hover redux_devtools: Test Redux DevTools. repaint-02: repaints on hover repaint-03: repaints on seek repaint-04: prefers nearest (<=) paint when seeking between paints repaint-05: prefers current time if pause creation failed outside of the focus window repaint-06: repaints the screen screen when stepping over code that modifies the DOM resizable-panels-01: Left side Toolbar and Video should be collapsible restart-session: restart debugging session scopes_rerender: Test that scopes are rerendered session-destroyed: errors caused by session failure should bubble to the root sourcemap_stacktrace: Test that stacktraces are sourcemapped stacking: Element highlighter selects the correct element when they overlap