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[flutter_tools] Deprecate web hot reload flag#181884

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nshahan:deprecate-hot-reload-flag
Feb 4, 2026
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[flutter_tools] Deprecate web hot reload flag#181884
auto-submit[bot] merged 3 commits into
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nshahan:deprecate-hot-reload-flag

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@nshahan

@nshahan nshahan commented Feb 4, 2026

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Warn when the flag is passed, and prompt to file an issue if disabling is required for a web development workflow.

The flag is enabled by default. It is still functional, but will be removed in an upcoming release.

Warn when the flag is passed, and prompt to file an issue if disabling
is required for a web development workflow.

The flag is enabled by default. It is still functional, but will be
removed in an upcoming release.
@github-actions github-actions Bot added the tool Affects the "flutter" command-line tool. See also t: labels. label Feb 4, 2026

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Code Review

This pull request deprecates the --web-experimental-hot-reload flag. It introduces warnings when the flag is used, updates the corresponding help text, and adds new tests to verify this behavior. The changes are logical and well-tested. I have one minor suggestion for code simplification.

Comment thread packages/flutter_tools/lib/src/commands/run.dart Outdated
@nshahan nshahan requested review from bkonyi and mdebbar February 4, 2026 19:35

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LGTM

@nshahan nshahan added the autosubmit Merge PR when tree becomes green via auto submit App label Feb 4, 2026
@auto-submit auto-submit Bot added this pull request to the merge queue Feb 4, 2026
Merged via the queue into flutter:master with commit 3d4a270 Feb 4, 2026
142 of 143 checks passed
@flutter-dashboard flutter-dashboard Bot removed the autosubmit Merge PR when tree becomes green via auto submit App label Feb 4, 2026
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request Feb 5, 2026
auto-submit Bot pushed a commit to flutter/packages that referenced this pull request Feb 5, 2026
Roll Flutter from bf701fefec86 to f916dd6887bf (44 revisions)

flutter/flutter@bf701fe...f916dd6

2026-02-05 nemeth@marcell.it Implement macOS wide gamut (Display P3) support (flutter/flutter#181769)
2026-02-04 engine-flutter-autoroll@skia.org Roll Skia from d23ecfbfdff9 to 8543ce512d5c (3 revisions) (flutter/flutter#181923)
2026-02-04 engine-flutter-autoroll@skia.org Roll Dart SDK from 8001c99d952b to 8f778ffd318b (3 revisions) (flutter/flutter#181927)
2026-02-04 jason-simmons@users.noreply.github.com Re-enable AddressSanitizer on the linux_unopt builder (flutter/flutter#181741)
2026-02-04 1063596+reidbaker@users.noreply.github.com Add exception to log message in ContentSizingFlag.java (flutter/flutter#181813)
2026-02-04 137456488+flutter-pub-roller-bot@users.noreply.github.com Roll pub packages (flutter/flutter#181925)
2026-02-04 nshahan@google.com [flutter_tools] Deprecate web hot reload flag (flutter/flutter#181884)
2026-02-04 magder@google.com Marks platform_views_scroll_perf_impeller__timeline_summary unflaky (flutter/flutter#181649)
2026-02-04 engine-flutter-autoroll@skia.org Roll Dart SDK from 204db085d970 to 8001c99d952b (1 revision) (flutter/flutter#181902)
2026-02-04 engine-flutter-autoroll@skia.org Roll Skia from f37a22506eb4 to d23ecfbfdff9 (23 revisions) (flutter/flutter#181915)
2026-02-04 jason-simmons@users.noreply.github.com In the Web codec tests, skip an undecodable image that is used to test a Skia error handling code path. (flutter/flutter#181870)
2026-02-04 engine-flutter-autoroll@skia.org Roll Packages from 5b1bea8 to 3bddf2c (5 revisions) (flutter/flutter#181918)
2026-02-04 engine-flutter-autoroll@skia.org Roll Fuchsia Linux SDK from UmQaaNuhkiuE8Dzug... to J2QdLcY2gyt4NP_xV... (flutter/flutter#181893)
2026-02-04 engine-flutter-autoroll@skia.org Roll Dart SDK from 54322a0b1109 to 204db085d970 (3 revisions) (flutter/flutter#181890)
2026-02-04 nurdaulet.97@gmail.com Cleanup cross imports (flutter/flutter#181807)
2026-02-04 kazbek.sultanov.doc@gmail.com [Material] Remove Material import from backdrop_filter_test.dart widget tests (flutter/flutter#181386)
2026-02-04 kazbek.sultanov.doc@gmail.com Move CheckedModeBanner tests to material and remove Material import from widgets banner_test (flutter/flutter#181261)
2026-02-04 git@reb0.org feat: Pass parameters from DropdownMenuFormField to DropDownMenu (flutter/flutter#181373)
2026-02-04 116356835+AbdeMohlbi@users.noreply.github.com Remove `Config complete` log when using `flutter build apk --config-only` (flutter/flutter#181864)
2026-02-04 flar@google.com [Impeller] Fix flattening of very large zoomed curves with tiny stroke widths (flutter/flutter#181505)
2026-02-03 prbillingsley89@gmail.com Propagates Overlay's MediaQueryData to OverlayPortal child (flutter/flutter#181579)
2026-02-03 ahmedsameha1@gmail.com Make sure that an AnimatedScale doesn't crash in 0x0 environment (flutter/flutter#181481)
2026-02-03 engine-flutter-autoroll@skia.org Roll Dart SDK from 56294a92d5cc to 54322a0b1109 (1 revision) (flutter/flutter#181872)
2026-02-03 zemanux@users.noreply.github.com Fix decorated box (flutter/flutter#179802)
2026-02-03 137456488+flutter-pub-roller-bot@users.noreply.github.com Roll pub packages (flutter/flutter#181871)
2026-02-03 70534390+Erengun@users.noreply.github.com Remove Material library dependency from expansible_test.dart (flutter/flutter#181657)
2026-02-03 evanwall@buffalo.edu Organize and update fragment shader uniform tests. (flutter/flutter#181822)
2026-02-03 1961493+harryterkelsen@users.noreply.github.com fix(web_ui): handle non-invertible matrices in ImageFilter.matrix (flutter/flutter#181742)
2026-02-03 nhan13574@gmail.com Remove unnecessary Material import from cupertino/slider_test.dart (flutter/flutter#180957)
2026-02-03 15619084+vashworth@users.noreply.github.com Remove the Flutter.xcframework as a swift dependency (flutter/flutter#181739)
2026-02-03 matt.kosarek@canonical.com feature: implementation of tooltips in the `_TestWindowingOwner` and minor bugfixes to the multiple windows example app (flutter/flutter#181510)
2026-02-03 737941+loic-sharma@users.noreply.github.com [Web] Fix flt-platform-view comment (flutter/flutter#181576)
2026-02-03 fluttergithubbot@gmail.com Marks Linux_pixel_7pro android_verified_input_test to be unflaky (flutter/flutter#179120)
2026-02-03 34871572+gmackall@users.noreply.github.com Unmark `hybrid_android_views_integration_test` as bringup (flutter/flutter#181628)
2026-02-03 brackenavaron@gmail.com Remove material from sliver_tree_test.dart (flutter/flutter#181415)
2026-02-03 34871572+gmackall@users.noreply.github.com Make `android_plugin_new_output_dir_test` only build release (flutter/flutter#181677)
2026-02-03 737941+loic-sharma@users.noreply.github.com Roll customer tests (flutter/flutter#181825)
2026-02-03 41432658+jonathimer@users.noreply.github.com Add Linux Foundation Health Score badge to README (flutter/flutter#175587)
2026-02-03 116356835+AbdeMohlbi@users.noreply.github.com Remove unused getters on AndroidProject class (flutter/flutter#181860)
2026-02-03 47866232+chunhtai@users.noreply.github.com Adds batch release doc for flutter/package (flutter/flutter#181676)
2026-02-03 bkonyi@google.com [ Tool ] Don't use `globals.platform` in `getFlutterRoot()` (flutter/flutter#181859)
2026-02-03 engine-flutter-autoroll@skia.org Roll Packages from 837dbbd to 5b1bea8 (10 revisions) (flutter/flutter#181857)
2026-02-03 brackenavaron@gmail.com Remove material from basic_test.dart (flutter/flutter#181444)
2026-02-03 bkonyi@google.com [ Tool ] Fix regression introduced in flutter/flutter#181421 (flutter/flutter#181826)

If this roll has caused a breakage, revert this CL and stop the roller
...
LongCatIsLooong pushed a commit to LongCatIsLooong/flutter that referenced this pull request Feb 6, 2026
Warn when the flag is passed, and prompt to file an issue if disabling
is required for a web development workflow.

The flag is enabled by default. It is still functional, but will be
removed in an upcoming release.
flutter-zl pushed a commit to flutter-zl/flutter that referenced this pull request Feb 10, 2026
Warn when the flag is passed, and prompt to file an issue if disabling
is required for a web development workflow.

The flag is enabled by default. It is still functional, but will be
removed in an upcoming release.
rickhohler pushed a commit to rickhohler/flutter that referenced this pull request Feb 19, 2026
Warn when the flag is passed, and prompt to file an issue if disabling
is required for a web development workflow.

The flag is enabled by default. It is still functional, but will be
removed in an upcoming release.
@nshahan nshahan deleted the deprecate-hot-reload-flag branch March 31, 2026 20:43
creatorpiyush pushed a commit to creatorpiyush/packages that referenced this pull request Jun 10, 2026
…r#10967)

Roll Flutter from bf701fefec86 to f916dd6887bf (44 revisions)

flutter/flutter@bf701fe...f916dd6

2026-02-05 nemeth@marcell.it Implement macOS wide gamut (Display P3) support (flutter/flutter#181769)
2026-02-04 engine-flutter-autoroll@skia.org Roll Skia from d23ecfbfdff9 to 8543ce512d5c (3 revisions) (flutter/flutter#181923)
2026-02-04 engine-flutter-autoroll@skia.org Roll Dart SDK from 8001c99d952b to 8f778ffd318b (3 revisions) (flutter/flutter#181927)
2026-02-04 jason-simmons@users.noreply.github.com Re-enable AddressSanitizer on the linux_unopt builder (flutter/flutter#181741)
2026-02-04 1063596+reidbaker@users.noreply.github.com Add exception to log message in ContentSizingFlag.java (flutter/flutter#181813)
2026-02-04 137456488+flutter-pub-roller-bot@users.noreply.github.com Roll pub packages (flutter/flutter#181925)
2026-02-04 nshahan@google.com [flutter_tools] Deprecate web hot reload flag (flutter/flutter#181884)
2026-02-04 magder@google.com Marks platform_views_scroll_perf_impeller__timeline_summary unflaky (flutter/flutter#181649)
2026-02-04 engine-flutter-autoroll@skia.org Roll Dart SDK from 204db085d970 to 8001c99d952b (1 revision) (flutter/flutter#181902)
2026-02-04 engine-flutter-autoroll@skia.org Roll Skia from f37a22506eb4 to d23ecfbfdff9 (23 revisions) (flutter/flutter#181915)
2026-02-04 jason-simmons@users.noreply.github.com In the Web codec tests, skip an undecodable image that is used to test a Skia error handling code path. (flutter/flutter#181870)
2026-02-04 engine-flutter-autoroll@skia.org Roll Packages from 5b1bea8 to 3bddf2c (5 revisions) (flutter/flutter#181918)
2026-02-04 engine-flutter-autoroll@skia.org Roll Fuchsia Linux SDK from UmQaaNuhkiuE8Dzug... to J2QdLcY2gyt4NP_xV... (flutter/flutter#181893)
2026-02-04 engine-flutter-autoroll@skia.org Roll Dart SDK from 54322a0b1109 to 204db085d970 (3 revisions) (flutter/flutter#181890)
2026-02-04 nurdaulet.97@gmail.com Cleanup cross imports (flutter/flutter#181807)
2026-02-04 kazbek.sultanov.doc@gmail.com [Material] Remove Material import from backdrop_filter_test.dart widget tests (flutter/flutter#181386)
2026-02-04 kazbek.sultanov.doc@gmail.com Move CheckedModeBanner tests to material and remove Material import from widgets banner_test (flutter/flutter#181261)
2026-02-04 git@reb0.org feat: Pass parameters from DropdownMenuFormField to DropDownMenu (flutter/flutter#181373)
2026-02-04 116356835+AbdeMohlbi@users.noreply.github.com Remove `Config complete` log when using `flutter build apk --config-only` (flutter/flutter#181864)
2026-02-04 flar@google.com [Impeller] Fix flattening of very large zoomed curves with tiny stroke widths (flutter/flutter#181505)
2026-02-03 prbillingsley89@gmail.com Propagates Overlay's MediaQueryData to OverlayPortal child (flutter/flutter#181579)
2026-02-03 ahmedsameha1@gmail.com Make sure that an AnimatedScale doesn't crash in 0x0 environment (flutter/flutter#181481)
2026-02-03 engine-flutter-autoroll@skia.org Roll Dart SDK from 56294a92d5cc to 54322a0b1109 (1 revision) (flutter/flutter#181872)
2026-02-03 zemanux@users.noreply.github.com Fix decorated box (flutter/flutter#179802)
2026-02-03 137456488+flutter-pub-roller-bot@users.noreply.github.com Roll pub packages (flutter/flutter#181871)
2026-02-03 70534390+Erengun@users.noreply.github.com Remove Material library dependency from expansible_test.dart (flutter/flutter#181657)
2026-02-03 evanwall@buffalo.edu Organize and update fragment shader uniform tests. (flutter/flutter#181822)
2026-02-03 1961493+harryterkelsen@users.noreply.github.com fix(web_ui): handle non-invertible matrices in ImageFilter.matrix (flutter/flutter#181742)
2026-02-03 nhan13574@gmail.com Remove unnecessary Material import from cupertino/slider_test.dart (flutter/flutter#180957)
2026-02-03 15619084+vashworth@users.noreply.github.com Remove the Flutter.xcframework as a swift dependency (flutter/flutter#181739)
2026-02-03 matt.kosarek@canonical.com feature: implementation of tooltips in the `_TestWindowingOwner` and minor bugfixes to the multiple windows example app (flutter/flutter#181510)
2026-02-03 737941+loic-sharma@users.noreply.github.com [Web] Fix flt-platform-view comment (flutter/flutter#181576)
2026-02-03 fluttergithubbot@gmail.com Marks Linux_pixel_7pro android_verified_input_test to be unflaky (flutter/flutter#179120)
2026-02-03 34871572+gmackall@users.noreply.github.com Unmark `hybrid_android_views_integration_test` as bringup (flutter/flutter#181628)
2026-02-03 brackenavaron@gmail.com Remove material from sliver_tree_test.dart (flutter/flutter#181415)
2026-02-03 34871572+gmackall@users.noreply.github.com Make `android_plugin_new_output_dir_test` only build release (flutter/flutter#181677)
2026-02-03 737941+loic-sharma@users.noreply.github.com Roll customer tests (flutter/flutter#181825)
2026-02-03 41432658+jonathimer@users.noreply.github.com Add Linux Foundation Health Score badge to README (flutter/flutter#175587)
2026-02-03 116356835+AbdeMohlbi@users.noreply.github.com Remove unused getters on AndroidProject class (flutter/flutter#181860)
2026-02-03 47866232+chunhtai@users.noreply.github.com Adds batch release doc for flutter/package (flutter/flutter#181676)
2026-02-03 bkonyi@google.com [ Tool ] Don't use `globals.platform` in `getFlutterRoot()` (flutter/flutter#181859)
2026-02-03 engine-flutter-autoroll@skia.org Roll Packages from 837dbbd to 5b1bea8 (10 revisions) (flutter/flutter#181857)
2026-02-03 brackenavaron@gmail.com Remove material from basic_test.dart (flutter/flutter#181444)
2026-02-03 bkonyi@google.com [ Tool ] Fix regression introduced in flutter/flutter#181421 (flutter/flutter#181826)

If this roll has caused a breakage, revert this CL and stop the roller
...
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