minimum-touch-target

Group: Accessibility
Path: lint/a11y/minimum-touch-target
Default: Off, opt in
Origin: Falcon
Domain: flutter
Rule: 268 of 512

flutter

Warn about explicitly undersized Flutter touch targets.

SizedBox and Container are checked when their direct child is interactive. CupertinoButton needs 44 logical pixels; other supported targets need 48. Gestures without an active callback and explicitly disabled buttons are skipped. Dynamic dimensions, indirect constraints, and non-interactive children are not inferred.

Invalid

example.dartdart

import 'package:flutter/material.dart';
import 'package:flutter/material.dart' as f;

void targets() {
  SizedBox(width: 47, child: IconButton());
  SizedBox(height: 24.0, child: FloatingActionButton());
  f.Container(width: 0, child: GestureDetector(onTap: () {}));
  new SizedBox(width: 32, height: 32, child: InkWell(onTap: () {}));
  const SizedBox(height: (47.5), child: TextButton());
  Container(width: -1, child: ElevatedButton());
  SizedBox(width: 43, child: CupertinoButton(onPressed: () {}));
}

void callbacks(dynamic callback) {
  SizedBox(width: 1, child: IconButton(onPressed: callback));
  SizedBox(width: 1, child: IconButton.filled(onPressed: () {}));
  SizedBox(width: 1, child: FloatingActionButton.small(onPressed: (callback)));
  SizedBox(width: 1, child: TextButton(onPressed: null, onLongPress: () {}));
  SizedBox(width: 1, child: ElevatedButton(onPressed: (null), onLongPress: callback));
  SizedBox(width: 1, child: OutlinedButton(onPressed: () {}, onLongPress: null));
  SizedBox(width: 1, child: RawMaterialButton(onPressed: callback));
  SizedBox(width: 43, child: CupertinoButton(onPressed: (callback)));
  SizedBox(width: 43, child: CupertinoButton(onPressed: null, onLongPress: () {}));
  SizedBox(width: 1, child: TextButton(onLongPress: null));
  SizedBox(width: 1, child: GestureDetector(onTap: (callback)));
  SizedBox(width: 1, child: InkWell(onTap: null, onLongPress: () {}));
}

void additionalGestures(dynamic callback) {
  SizedBox(width: 1, child: GestureDetector(onSecondaryTapCancel: callback));
  SizedBox(width: 1, child: GestureDetector(onTertiaryTapCancel: callback));
  SizedBox(width: 1, child: GestureDetector(onLongPressCancel: callback));
  SizedBox(width: 1, child: GestureDetector(onSecondaryLongPressDown: callback));
  SizedBox(width: 1, child: GestureDetector(onSecondaryLongPressCancel: callback));
  SizedBox(width: 1, child: GestureDetector(onSecondaryLongPress: callback));
  SizedBox(width: 1, child: GestureDetector(onSecondaryLongPressStart: callback));
  SizedBox(width: 1, child: GestureDetector(onSecondaryLongPressMoveUpdate: callback));
  SizedBox(width: 1, child: GestureDetector(onSecondaryLongPressUp: callback));
  SizedBox(width: 1, child: GestureDetector(onSecondaryLongPressEnd: callback));
  SizedBox(width: 1, child: GestureDetector(onTertiaryLongPressDown: callback));
  SizedBox(width: 1, child: GestureDetector(onTertiaryLongPressCancel: callback));
  SizedBox(width: 1, child: GestureDetector(onTertiaryLongPress: callback));
  SizedBox(width: 1, child: GestureDetector(onTertiaryLongPressStart: callback));
  SizedBox(width: 1, child: GestureDetector(onTertiaryLongPressMoveUpdate: callback));
  SizedBox(width: 1, child: GestureDetector(onTertiaryLongPressUp: callback));
  SizedBox(width: 1, child: GestureDetector(onTertiaryLongPressEnd: callback));
  SizedBox(width: 1, child: GestureDetector(onVerticalDragDown: callback));
  SizedBox(width: 1, child: GestureDetector(onVerticalDragCancel: callback));
  SizedBox(width: 1, child: GestureDetector(onHorizontalDragDown: callback));
  SizedBox(width: 1, child: GestureDetector(onHorizontalDragCancel: callback));
  SizedBox(width: 1, child: GestureDetector(onForcePressStart: callback));
  SizedBox(width: 1, child: GestureDetector(onForcePressPeak: callback));
  SizedBox(width: 1, child: GestureDetector(onForcePressUpdate: callback));
  SizedBox(width: 1, child: GestureDetector(onForcePressEnd: callback));
  SizedBox(width: 1, child: GestureDetector(onPanCancel: callback));
  f.SizedBox(width: 1, child: f.GestureDetector(onTapMove: (_) {}, onTap: callback));
  SizedBox(width: 1, child: GestureDetector(onSecondaryLongPress: () {}));
  SizedBox(width: 1, child: InkWell(onSecondaryTapCancel: () {}, onSecondaryTapDown: callback));
  SizedBox(width: 1, child: InkResponse(onSecondaryTapCancel: (callback), onSecondaryTap: () {}));
}

void inkEnablingCallbacks(dynamic callback) {
  SizedBox(width: 1, child: InkWell(onTap: callback));
  SizedBox(width: 1, child: InkWell(onTapDown: callback));
  SizedBox(width: 1, child: InkWell(onTapUp: callback));
  SizedBox(width: 1, child: InkWell(onDoubleTap: callback));
  SizedBox(width: 1, child: InkWell(onLongPress: callback));
  SizedBox(width: 1, child: InkWell(onLongPressUp: callback));
  SizedBox(width: 1, child: InkWell(onSecondaryTap: callback));
  SizedBox(width: 1, child: InkWell(onSecondaryTapDown: callback));
  SizedBox(width: 1, child: InkWell(onSecondaryTapUp: callback));
  SizedBox(width: 1, child: InkResponse(onTap: callback));
  SizedBox(width: 1, child: InkResponse(onTapDown: callback));
  SizedBox(width: 1, child: InkResponse(onTapUp: callback));
  SizedBox(width: 1, child: InkResponse(onDoubleTap: callback));
  SizedBox(width: 1, child: InkResponse(onLongPress: callback));
  SizedBox(width: 1, child: InkResponse(onLongPressUp: callback));
  SizedBox(width: 1, child: InkResponse(onSecondaryTap: callback));
  SizedBox(width: 1, child: InkResponse(onSecondaryTapDown: callback));
  SizedBox(width: 1, child: InkResponse(onSecondaryTapUp: callback));
  SizedBox(width: 1, child: GestureDetector(onTapCancel: callback));
  SizedBox(width: 1, child: InkWell(onTapCancel: callback, onTap: () {}));
  SizedBox(width: 1, child: InkResponse(onTapCancel: () {}, onTapUp: callback));
}

Provide a touch target at least 48 logical pixels wide and high.

4void targets() {

5 SizedBox(width: 47, child: IconButton());

∙

Provide a touch target at least 48 logical pixels wide and high.

5 SizedBox(width: 47, child: IconButton());

6 SizedBox(height: 24.0, child: FloatingActionButton());

∙

Provide a touch target at least 48 logical pixels wide and high.

6 SizedBox(height: 24.0, child: FloatingActionButton());

7 f.Container(width: 0, child: GestureDetector(onTap: () {}));

∙

Provide a touch target at least 48 logical pixels wide and high.

7 f.Container(width: 0, child: GestureDetector(onTap: () {}));

8 new SizedBox(width: 32, height: 32, child: InkWell(onTap: () {}));

∙

Provide a touch target at least 48 logical pixels wide and high.

8 new SizedBox(width: 32, height: 32, child: InkWell(onTap: () {}));

9 const SizedBox(height: (47.5), child: TextButton());

∙

Provide a touch target at least 48 logical pixels wide and high.

9 const SizedBox(height: (47.5), child: TextButton());

10 Container(width: -1, child: ElevatedButton());

∙

Provide a touch target at least 44 logical pixels wide and high.

10 Container(width: -1, child: ElevatedButton());

11 SizedBox(width: 43, child: CupertinoButton(onPressed: () {}));

∙

Provide a touch target at least 48 logical pixels wide and high.

14void callbacks(dynamic callback) {

15 SizedBox(width: 1, child: IconButton(onPressed: callback));

∙

Provide a touch target at least 48 logical pixels wide and high.

15 SizedBox(width: 1, child: IconButton(onPressed: callback));

16 SizedBox(width: 1, child: IconButton.filled(onPressed: () {}));

∙

Provide a touch target at least 48 logical pixels wide and high.

16 SizedBox(width: 1, child: IconButton.filled(onPressed: () {}));

17 SizedBox(width: 1, child: FloatingActionButton.small(onPressed: (callback)));

∙

Provide a touch target at least 48 logical pixels wide and high.

17 SizedBox(width: 1, child: FloatingActionButton.small(onPressed: (callback)));

18 SizedBox(width: 1, child: TextButton(onPressed: null, onLongPress: () {}));

∙

Provide a touch target at least 48 logical pixels wide and high.

18 SizedBox(width: 1, child: TextButton(onPressed: null, onLongPress: () {}));

19 SizedBox(width: 1, child: ElevatedButton(onPressed: (null), onLongPress: callback));

∙

Provide a touch target at least 48 logical pixels wide and high.

19 SizedBox(width: 1, child: ElevatedButton(onPressed: (null), onLongPress: callback));

20 SizedBox(width: 1, child: OutlinedButton(onPressed: () {}, onLongPress: null));

∙

Provide a touch target at least 48 logical pixels wide and high.

20 SizedBox(width: 1, child: OutlinedButton(onPressed: () {}, onLongPress: null));

21 SizedBox(width: 1, child: RawMaterialButton(onPressed: callback));

∙

Provide a touch target at least 44 logical pixels wide and high.

21 SizedBox(width: 1, child: RawMaterialButton(onPressed: callback));

22 SizedBox(width: 43, child: CupertinoButton(onPressed: (callback)));

∙

Provide a touch target at least 44 logical pixels wide and high.

22 SizedBox(width: 43, child: CupertinoButton(onPressed: (callback)));

23 SizedBox(width: 43, child: CupertinoButton(onPressed: null, onLongPress: () {}));

∙

Provide a touch target at least 48 logical pixels wide and high.

23 SizedBox(width: 43, child: CupertinoButton(onPressed: null, onLongPress: () {}));

24 SizedBox(width: 1, child: TextButton(onLongPress: null));

∙

Provide a touch target at least 48 logical pixels wide and high.

24 SizedBox(width: 1, child: TextButton(onLongPress: null));

25 SizedBox(width: 1, child: GestureDetector(onTap: (callback)));

∙

Provide a touch target at least 48 logical pixels wide and high.

25 SizedBox(width: 1, child: GestureDetector(onTap: (callback)));

26 SizedBox(width: 1, child: InkWell(onTap: null, onLongPress: () {}));

∙

Provide a touch target at least 48 logical pixels wide and high.

29void additionalGestures(dynamic callback) {

30 SizedBox(width: 1, child: GestureDetector(onSecondaryTapCancel: callback));

∙

Provide a touch target at least 48 logical pixels wide and high.

30 SizedBox(width: 1, child: GestureDetector(onSecondaryTapCancel: callback));

31 SizedBox(width: 1, child: GestureDetector(onTertiaryTapCancel: callback));

∙

Provide a touch target at least 48 logical pixels wide and high.

31 SizedBox(width: 1, child: GestureDetector(onTertiaryTapCancel: callback));

32 SizedBox(width: 1, child: GestureDetector(onLongPressCancel: callback));

∙

Provide a touch target at least 48 logical pixels wide and high.

32 SizedBox(width: 1, child: GestureDetector(onLongPressCancel: callback));

33 SizedBox(width: 1, child: GestureDetector(onSecondaryLongPressDown: callback));

∙

Provide a touch target at least 48 logical pixels wide and high.

33 SizedBox(width: 1, child: GestureDetector(onSecondaryLongPressDown: callback));

34 SizedBox(width: 1, child: GestureDetector(onSecondaryLongPressCancel: callback));

∙

Provide a touch target at least 48 logical pixels wide and high.

34 SizedBox(width: 1, child: GestureDetector(onSecondaryLongPressCancel: callback));

35 SizedBox(width: 1, child: GestureDetector(onSecondaryLongPress: callback));

∙

Provide a touch target at least 48 logical pixels wide and high.

35 SizedBox(width: 1, child: GestureDetector(onSecondaryLongPress: callback));

36 SizedBox(width: 1, child: GestureDetector(onSecondaryLongPressStart: callback));

∙

Provide a touch target at least 48 logical pixels wide and high.

36 SizedBox(width: 1, child: GestureDetector(onSecondaryLongPressStart: callback));

37 SizedBox(width: 1, child: GestureDetector(onSecondaryLongPressMoveUpdate: callback));

∙

Provide a touch target at least 48 logical pixels wide and high.

37 SizedBox(width: 1, child: GestureDetector(onSecondaryLongPressMoveUpdate: callback));

38 SizedBox(width: 1, child: GestureDetector(onSecondaryLongPressUp: callback));

∙

Provide a touch target at least 48 logical pixels wide and high.

38 SizedBox(width: 1, child: GestureDetector(onSecondaryLongPressUp: callback));

39 SizedBox(width: 1, child: GestureDetector(onSecondaryLongPressEnd: callback));

∙

Provide a touch target at least 48 logical pixels wide and high.

39 SizedBox(width: 1, child: GestureDetector(onSecondaryLongPressEnd: callback));

40 SizedBox(width: 1, child: GestureDetector(onTertiaryLongPressDown: callback));

∙

Provide a touch target at least 48 logical pixels wide and high.

40 SizedBox(width: 1, child: GestureDetector(onTertiaryLongPressDown: callback));

41 SizedBox(width: 1, child: GestureDetector(onTertiaryLongPressCancel: callback));

∙

Provide a touch target at least 48 logical pixels wide and high.

41 SizedBox(width: 1, child: GestureDetector(onTertiaryLongPressCancel: callback));

42 SizedBox(width: 1, child: GestureDetector(onTertiaryLongPress: callback));

∙

Provide a touch target at least 48 logical pixels wide and high.

42 SizedBox(width: 1, child: GestureDetector(onTertiaryLongPress: callback));

43 SizedBox(width: 1, child: GestureDetector(onTertiaryLongPressStart: callback));

∙

Provide a touch target at least 48 logical pixels wide and high.

43 SizedBox(width: 1, child: GestureDetector(onTertiaryLongPressStart: callback));

44 SizedBox(width: 1, child: GestureDetector(onTertiaryLongPressMoveUpdate: callback));

∙

Provide a touch target at least 48 logical pixels wide and high.

44 SizedBox(width: 1, child: GestureDetector(onTertiaryLongPressMoveUpdate: callback));

45 SizedBox(width: 1, child: GestureDetector(onTertiaryLongPressUp: callback));

∙

Provide a touch target at least 48 logical pixels wide and high.

45 SizedBox(width: 1, child: GestureDetector(onTertiaryLongPressUp: callback));

46 SizedBox(width: 1, child: GestureDetector(onTertiaryLongPressEnd: callback));

∙

Provide a touch target at least 48 logical pixels wide and high.

46 SizedBox(width: 1, child: GestureDetector(onTertiaryLongPressEnd: callback));

47 SizedBox(width: 1, child: GestureDetector(onVerticalDragDown: callback));

∙

Provide a touch target at least 48 logical pixels wide and high.

47 SizedBox(width: 1, child: GestureDetector(onVerticalDragDown: callback));

48 SizedBox(width: 1, child: GestureDetector(onVerticalDragCancel: callback));

∙

Provide a touch target at least 48 logical pixels wide and high.

48 SizedBox(width: 1, child: GestureDetector(onVerticalDragCancel: callback));

49 SizedBox(width: 1, child: GestureDetector(onHorizontalDragDown: callback));

∙

Provide a touch target at least 48 logical pixels wide and high.

49 SizedBox(width: 1, child: GestureDetector(onHorizontalDragDown: callback));

50 SizedBox(width: 1, child: GestureDetector(onHorizontalDragCancel: callback));

∙

Provide a touch target at least 48 logical pixels wide and high.

50 SizedBox(width: 1, child: GestureDetector(onHorizontalDragCancel: callback));

51 SizedBox(width: 1, child: GestureDetector(onForcePressStart: callback));

∙

Provide a touch target at least 48 logical pixels wide and high.

51 SizedBox(width: 1, child: GestureDetector(onForcePressStart: callback));

52 SizedBox(width: 1, child: GestureDetector(onForcePressPeak: callback));

∙

Provide a touch target at least 48 logical pixels wide and high.

52 SizedBox(width: 1, child: GestureDetector(onForcePressPeak: callback));

53 SizedBox(width: 1, child: GestureDetector(onForcePressUpdate: callback));

∙

Provide a touch target at least 48 logical pixels wide and high.

53 SizedBox(width: 1, child: GestureDetector(onForcePressUpdate: callback));

54 SizedBox(width: 1, child: GestureDetector(onForcePressEnd: callback));

∙

Provide a touch target at least 48 logical pixels wide and high.

54 SizedBox(width: 1, child: GestureDetector(onForcePressEnd: callback));

55 SizedBox(width: 1, child: GestureDetector(onPanCancel: callback));

∙

Provide a touch target at least 48 logical pixels wide and high.

55 SizedBox(width: 1, child: GestureDetector(onPanCancel: callback));

56 f.SizedBox(width: 1, child: f.GestureDetector(onTapMove: (_) {}, onTap: callback));

∙

Provide a touch target at least 48 logical pixels wide and high.

56 f.SizedBox(width: 1, child: f.GestureDetector(onTapMove: (_) {}, onTap: callback));

57 SizedBox(width: 1, child: GestureDetector(onSecondaryLongPress: () {}));

∙

Provide a touch target at least 48 logical pixels wide and high.

57 SizedBox(width: 1, child: GestureDetector(onSecondaryLongPress: () {}));

58 SizedBox(width: 1, child: InkWell(onSecondaryTapCancel: () {}, onSecondaryTapDown: callback));

∙

Provide a touch target at least 48 logical pixels wide and high.

58 SizedBox(width: 1, child: InkWell(onSecondaryTapCancel: () {}, onSecondaryTapDown: callback));

59 SizedBox(width: 1, child: InkResponse(onSecondaryTapCancel: (callback), onSecondaryTap: () {}));

∙

Provide a touch target at least 48 logical pixels wide and high.

62void inkEnablingCallbacks(dynamic callback) {

63 SizedBox(width: 1, child: InkWell(onTap: callback));

∙

Provide a touch target at least 48 logical pixels wide and high.

63 SizedBox(width: 1, child: InkWell(onTap: callback));

64 SizedBox(width: 1, child: InkWell(onTapDown: callback));

∙

Provide a touch target at least 48 logical pixels wide and high.

64 SizedBox(width: 1, child: InkWell(onTapDown: callback));

65 SizedBox(width: 1, child: InkWell(onTapUp: callback));

∙

Provide a touch target at least 48 logical pixels wide and high.

65 SizedBox(width: 1, child: InkWell(onTapUp: callback));

66 SizedBox(width: 1, child: InkWell(onDoubleTap: callback));

∙

Provide a touch target at least 48 logical pixels wide and high.

66 SizedBox(width: 1, child: InkWell(onDoubleTap: callback));

67 SizedBox(width: 1, child: InkWell(onLongPress: callback));

∙

Provide a touch target at least 48 logical pixels wide and high.

67 SizedBox(width: 1, child: InkWell(onLongPress: callback));

68 SizedBox(width: 1, child: InkWell(onLongPressUp: callback));

∙

Provide a touch target at least 48 logical pixels wide and high.

68 SizedBox(width: 1, child: InkWell(onLongPressUp: callback));

69 SizedBox(width: 1, child: InkWell(onSecondaryTap: callback));

∙

Provide a touch target at least 48 logical pixels wide and high.

69 SizedBox(width: 1, child: InkWell(onSecondaryTap: callback));

70 SizedBox(width: 1, child: InkWell(onSecondaryTapDown: callback));

∙

Provide a touch target at least 48 logical pixels wide and high.

70 SizedBox(width: 1, child: InkWell(onSecondaryTapDown: callback));

71 SizedBox(width: 1, child: InkWell(onSecondaryTapUp: callback));

∙

Provide a touch target at least 48 logical pixels wide and high.

71 SizedBox(width: 1, child: InkWell(onSecondaryTapUp: callback));

72 SizedBox(width: 1, child: InkResponse(onTap: callback));

∙

Provide a touch target at least 48 logical pixels wide and high.

72 SizedBox(width: 1, child: InkResponse(onTap: callback));

73 SizedBox(width: 1, child: InkResponse(onTapDown: callback));

∙

Provide a touch target at least 48 logical pixels wide and high.

73 SizedBox(width: 1, child: InkResponse(onTapDown: callback));

74 SizedBox(width: 1, child: InkResponse(onTapUp: callback));

∙

Provide a touch target at least 48 logical pixels wide and high.

74 SizedBox(width: 1, child: InkResponse(onTapUp: callback));

75 SizedBox(width: 1, child: InkResponse(onDoubleTap: callback));

∙

Provide a touch target at least 48 logical pixels wide and high.

75 SizedBox(width: 1, child: InkResponse(onDoubleTap: callback));

76 SizedBox(width: 1, child: InkResponse(onLongPress: callback));

∙

Provide a touch target at least 48 logical pixels wide and high.

76 SizedBox(width: 1, child: InkResponse(onLongPress: callback));

77 SizedBox(width: 1, child: InkResponse(onLongPressUp: callback));

∙

Provide a touch target at least 48 logical pixels wide and high.

77 SizedBox(width: 1, child: InkResponse(onLongPressUp: callback));

78 SizedBox(width: 1, child: InkResponse(onSecondaryTap: callback));

∙

Provide a touch target at least 48 logical pixels wide and high.

78 SizedBox(width: 1, child: InkResponse(onSecondaryTap: callback));

79 SizedBox(width: 1, child: InkResponse(onSecondaryTapDown: callback));

∙

Provide a touch target at least 48 logical pixels wide and high.

79 SizedBox(width: 1, child: InkResponse(onSecondaryTapDown: callback));

80 SizedBox(width: 1, child: InkResponse(onSecondaryTapUp: callback));

∙

Provide a touch target at least 48 logical pixels wide and high.

80 SizedBox(width: 1, child: InkResponse(onSecondaryTapUp: callback));

81 SizedBox(width: 1, child: GestureDetector(onTapCancel: callback));

∙

Provide a touch target at least 48 logical pixels wide and high.

81 SizedBox(width: 1, child: GestureDetector(onTapCancel: callback));

82 SizedBox(width: 1, child: InkWell(onTapCancel: callback, onTap: () {}));

∙

Provide a touch target at least 48 logical pixels wide and high.

82 SizedBox(width: 1, child: InkWell(onTapCancel: callback, onTap: () {}));

83 SizedBox(width: 1, child: InkResponse(onTapCancel: () {}, onTapUp: callback));

∙

Valid

example.dartdart

import 'package:flutter/material.dart';
import 'package:flutter/material.dart' as f;

void targets(double size) {
  SizedBox(width: 48, height: 48, child: IconButton());
  Container(width: 60, child: GestureDetector(onTap: () {}));
  SizedBox(width: size, child: InkWell());
  SizedBox(width: 16, child: Text('Decoration'));
  SizedBox(child: FloatingActionButton());
  IconButton();
  SizedBox(width: 16);
  SizedBox(width: 44, height: 44, child: CupertinoButton(onPressed: () {}));
  SizedBox(width: 1, child: GestureDetector());
  SizedBox(width: 1, child: InkWell(onTap: null));
  SizedBox(width: 1, child: InkResponse());
  SizedBox(width: 1, child: IconButton(onPressed: null));
  f.Container(height: 1, child: f.IconButton.filled(onPressed: (null)));
  SizedBox(width: 1, child: FloatingActionButton(onPressed: null));
  SizedBox(width: 1, child: FloatingActionButton.small(onPressed: (null)));
  SizedBox(width: 1, child: TextButton(onPressed: null));
  SizedBox(width: 1, child: ElevatedButton(onPressed: (null), onLongPress: null));
  SizedBox(width: 1, child: OutlinedButton(onPressed: null, onLongPress: (null)));
  SizedBox(width: 1, child: RawMaterialButton(onPressed: null));
  SizedBox(width: 1, child: CupertinoButton(onPressed: ((null))));
}
void shadow(dynamic SizedBox) { SizedBox(width: 1, child: IconButton()); }

void inactiveAdditionalGestures() {
  SizedBox(width: 1, child: GestureDetector(onTapMove: (null)));
  SizedBox(width: 1, child: GestureDetector(onSecondaryTapCancel: null));
  SizedBox(width: 1, child: GestureDetector(onTertiaryTapCancel: null));
  SizedBox(width: 1, child: GestureDetector(onLongPressCancel: null));
  SizedBox(width: 1, child: GestureDetector(onSecondaryLongPressDown: null));
  SizedBox(width: 1, child: GestureDetector(onSecondaryLongPressCancel: null));
  SizedBox(width: 1, child: GestureDetector(onSecondaryLongPress: ((null))));
  SizedBox(width: 1, child: GestureDetector(onSecondaryLongPressStart: null));
  SizedBox(width: 1, child: GestureDetector(onSecondaryLongPressMoveUpdate: null));
  SizedBox(width: 1, child: GestureDetector(onSecondaryLongPressUp: null));
  SizedBox(width: 1, child: GestureDetector(onSecondaryLongPressEnd: null));
  SizedBox(width: 1, child: GestureDetector(onTertiaryLongPressDown: null));
  SizedBox(width: 1, child: GestureDetector(onTertiaryLongPressCancel: null));
  SizedBox(width: 1, child: GestureDetector(onTertiaryLongPress: null));
  SizedBox(width: 1, child: GestureDetector(onTertiaryLongPressStart: null));
  SizedBox(width: 1, child: GestureDetector(onTertiaryLongPressMoveUpdate: null));
  SizedBox(width: 1, child: GestureDetector(onTertiaryLongPressUp: null));
  SizedBox(width: 1, child: GestureDetector(onTertiaryLongPressEnd: null));
  SizedBox(width: 1, child: GestureDetector(onVerticalDragDown: null));
  SizedBox(width: 1, child: GestureDetector(onVerticalDragCancel: null));
  SizedBox(width: 1, child: GestureDetector(onHorizontalDragDown: null));
  SizedBox(width: 1, child: GestureDetector(onHorizontalDragCancel: null));
  SizedBox(width: 1, child: GestureDetector(onForcePressStart: null));
  SizedBox(width: 1, child: GestureDetector(onForcePressPeak: null));
  SizedBox(width: 1, child: GestureDetector(onForcePressUpdate: null));
  SizedBox(width: 1, child: GestureDetector(onForcePressEnd: null));
  SizedBox(width: 1, child: GestureDetector(onPanCancel: null));
  SizedBox(width: 1, child: InkWell(onSecondaryTapCancel: (null)));
  SizedBox(width: 1, child: InkResponse(onSecondaryTapCancel: null));
  SizedBox(width: 1, child: InkWell(onHover: (_) {}, onFocusChange: (_) {}, onHighlightChanged: (_) {}));
  SizedBox(width: 1, child: InkResponse(onHover: (_) {}, onFocusChange: (_) {}, onHighlightChanged: (_) {}));
  SizedBox(width: 48, child: GestureDetector(onSecondaryLongPress: () {}));
  SizedBox(height: 48, child: GestureDetector(onTapMove: (_) {}, onTap: () {}));
}

void inertRuntimeCallbacks(dynamic callback) {
  SizedBox(width: 1, child: GestureDetector(onTapMove: callback));
  f.SizedBox(width: 1, child: f.GestureDetector(onTapMove: (_) {}));
  SizedBox(width: 1, child: GestureDetector(onTapMove: callback, onTap: (null)));
  SizedBox(width: 1, child: InkWell(onSecondaryTapCancel: () {}));
  SizedBox(width: 1, child: InkResponse(onSecondaryTapCancel: (callback)));
  SizedBox(width: 1, child: InkWell(onTapCancel: callback));
  SizedBox(width: 1, child: InkResponse(onTapCancel: () {}));
  SizedBox(width: 1, child: InkWell(onTapCancel: callback, onSecondaryTapCancel: callback));
  SizedBox(width: 1, child: InkResponse(onTapCancel: callback, onSecondaryTapCancel: callback));
  SizedBox(width: 1, child: InkWell(onTapCancel: callback, onSecondaryTapCancel: callback,
    onTap: null, onTapDown: null, onTapUp: null, onDoubleTap: null,
    onLongPress: null, onLongPressUp: null,
    onSecondaryTap: null, onSecondaryTapDown: (null), onSecondaryTapUp: null));
  SizedBox(width: 1, child: InkResponse(onTapCancel: callback, onSecondaryTapCancel: callback,
    onTap: null, onTapDown: null, onTapUp: null, onDoubleTap: null,
    onLongPress: null, onLongPressUp: null,
    onSecondaryTap: null, onSecondaryTapDown: null, onSecondaryTapUp: (null)));
}

Configure minimum-touch-target

Set its severity in falcon.json. See the configuration guide.

falcon.jsonjson

{
  "linter": {
    "rules": {
      "a11y": {
        "minimum-touch-target": "error"
      }
    }
  }
}

Or silence one occurrence with a suppression comment; the reason is required.

example.dartdart

// falcon-ignore lint/a11y/minimum-touch-target: <reason>

prefer-action-button-tooltipflutter
Requires useful tooltips on Flutter floating action buttons and icon buttons.
accessible-widget-labelsflutter
Warn about unlabeled interactive gesture targets.
avoid-missing-image-altflutter
Requires semanticLabel on Flutter Image and imageSemanticLabel on FadeInImage.

Invalid

Valid

Configure minimum-touch-target

More accessibility rules