KeyboardEvent.which

A legacy KeyboardEvent property that is equivalent to either KeyboardEvent.keyCode or KeyboardEvent.charCode depending on whether the key is alphanumeric.

Spec	https://w3c.github.io/uievents/#dom-uievent-which
Status	Unofficial / Note

IE	Edge	Firefox	Chrome	Safari	Opera
			98
		95	97
		94	96	TP
11	95	93	95	15	80
10	94	92	94	14.1	79
9	93	91	93	14	78
8	92	90	92	13.1	77
Show all
7	91	89	91	13	76
6	90	88	90	12.1	75
5.5	89	87	89	12	74
	88	86	88	11.1	73
	87	85	87	11	72
	86	84	86	10.1	71
	85	83	85	10	70
	84	82	84	9.1	69
	83	81	83	9	68
	81	80	81	8	67
	80	79	80	7.1	66
	79	78	79	7	65
	18	77	78	6.1	64
	17	76	77	6	63
	16	75	76	5.1	62
	15	74	75	5	60
	14	73	74	4	58
	13	72	73	3.2	57
	12	71	72	3.1	56
		70	71		55
		69	70		54
		68	69		53
		67	68		52
		66	67		51
		65	66		50
		64	65		49
		63	64		48
		62	63		47
		61	62		46
		60	61		45
		59	60		44
		58	59		43
		57	58		42
		56	57		41
		55	56		40
		54	55		39
		53	54		38
		52	53		37
		51	52		36
		50	51		35
		49	50		34
		48	49		33
		47	48		32
		46	47		31
		45	46		30
		44	45		29
		43	44		28
		42	43		27
		41	42		26
		40	41		25
		39	40		24
		38	39		23
		37	38		22
		36	37		21
		35	36		20
		34	35		19
		33	34		18
		32	33		17
		31	32		16
		30	31		15
		29	30		12.1
		28	29		12
		27	28		11.6
		26	27		11.5
		25	26		11.1
		24	25		11
		23	24		10.6
		22	23		10.5
		21	22		10.0-10.1
		20	21		9.5-9.6
		19	20		9
		18	19
		17	18
		16	17
		15	16
		14	15
		13	14
		12	13
		11	12
		10	11
		9	10
		8	9
		7	8
		6	7
		5	6
		4	5
		3.6	4
		3.5
		3
		2

Safari on iOS	Opera Mini	Android Browser	Blackberry Browser	Opera Mobile	Android Chrome	Android Firefox	IE Mobile	Android UC Browser	Samsung Internet	QQ Browser	Baidu Browser	KaiOS Browser
15	all	94	10	64	94 (1)	92 (1)	11	12.12	15.0 (1)	10.4	7.12 (1)	2.5
14.5-14.8		4.4.3-4.4.4 (1)	7	12.1			10		14.0 (1)
14.0-14.4		4.4 (1)		12					13.0 (1)
13.4-13.7		4.2-4.3		11.5					12.0 (1)
Show all
13.3		4.1		11.1					11.1-11.2 (1)
13.2		4		11					10.1 (1)
13.0-13.1		3		10					9.2 (1)
12.2-12.5		2.3							8.2 (1)
12.0-12.1		2.2							7.2-7.4 (1)
11.3-11.4		2.1							6.2-6.4 (1)
11.0-11.2									5.0-5.4 (1)
10.3									4
10.0-10.2
9.3
9.0-9.2
8.1-8.4
8
7.0-7.1
6.0-6.1
5.0-5.1
4.2-4.3
4.0-4.1
3.2

Notes

This property is legacy and deprecated.
"Some key events, or their values, might be suppressed by the IME in use". On mobile (virtual keyboard), all keys are reported as 229.

1. event.which number for keys does not always match expected value (difference may be dependent on hardware vs. on-screen keyboard?).

Resources

• MDN Web Docs - which