CustomEvent

A DOM event interface that can carry custom application-defined data.

Spec	https://dom.spec.whatwg.org/#interface-customevent
Status	WHATWG Living Standard

IE	Edge	Firefox	Chrome	Safari	Opera
			103
		100	102
		99	101	TP
11 (1)	99	98	100	15.4	83
10 (1)	98	97	99	15.2-15.3	82
9 (1)	97	96	98	15.1	81
8	96	95	97	15	80
Show all
7	95	94	96	14.1	79
6	94	93	95	14	78
5.5	93	92	94	13.1	77
	92	91	93	13	76
	91	90	92	12.1	75
	90	89	91	12	74
	89	88	90	11.1	73
	88	87	89	11	72
	87	86	88	10.1	71
	86	85	87	10	70
	85	84	86	9.1	69
	84	83	85	9	68
	83	82	84	8	67
	81	81	83	7.1	66
	80	80	81	7	65
	79	79	80	6.1	64
	18	78	79	6	63
	17	77	78	5.1 (1,2)	62
	16	76	77	5	60
	15	75	76	4	58
	14	74	75	3.2	57
	13	73	74	3.1	56
	12	72	73		55
		71	72		54
		70	71		53
		69	70		52
		68	69		51
		67	68		50
		66	67		49
		65	66		48
		64	65		47
		63	64		46
		62	63		45
		61	62		44
		60	61		43
		59	60		42
		58	59		41
		57	58		40
		56	57		39
		55	56		38
		54	55		37
		53	54		36
		52	53		35
		51	52		34
		50	51		33
		49	50		32
		48	49		31
		47	48		30
		46	47		29
		45	46		28
		44	45		27
		43	44		26
		42	43		25
		41	42		24
		40	41		23
		39	40		22
		38	39		21
		37	38		20
		36	37		19
		35	36		18
		34	35		17
		33	34		16
		32	33		15
		31	32		12.1
		30	31		12
		29	30		11.6
		28	29		11.5 (1)
		27	28		11.1 (1)
		26	27		11 (1)
		25	26		10.6
		24	25		10.5
		23	24		10.0-10.1
		22	23		9.5-9.6
		21	22		9
		20	21
		19	20
		18	19
		17	18
		16	17
		15	16
		14	15
		13	14
		12	13
		11	12 (1,2)
		10 (1)	11 (1,2)
		9 (1)	10 (1,2)
		8 (1)	9 (1,2)
		7 (1)	8
		6 (1)	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
15.4	all	99	10	64	100	98	11 (1)	12.12	16.0	10.4	7.12	2.5
15.2-15.3		4.4.3-4.4.4	7 (1,2)	12.1			10 (1)		15.0
15.0-15.1		4.4		12					14.0
14.5-14.8		4.2-4.3 (1,2)		11.5 (1)					13.0
Show all
14.0-14.4		4.1 (1,2)		11.1 (1)					12.0
13.4-13.7		4 (1,2)		11 (1)					11.1-11.2
13.3		3 (1,2)		10					10.1
13.2		2.3							9.2
13.0-13.1		2.2							8.2
12.2-12.5		2.1							7.2-7.4
12.0-12.1									6.2-6.4
11.3-11.4									5.0-5.4
11.0-11.2									4
10.3
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 (1,2)
4.2-4.3
4.0-4.1
3.2

Notes

Not supported in some versions of Android's old WebKit-based WebView.

1. While a window.CustomEvent object exists, it cannot be called as a constructor. Instead of new CustomEvent(...), you must use e = document.createEvent('CustomEvent') and then e.initCustomEvent(...)

2. There is no window.CustomEvent object, but document.createEvent('CustomEvent') still works.

Resources

• MDN Web Docs - CustomEvent
• Polyfill based on the MDN snippet
• EventListener polyfill which includes a CustomEvent polyfill