Beacon API

Allows data to be sent asynchronously to a server with navigator.sendBeacon, even after a page was closed. Useful for posting analytics data the moment a user was finished using the page.

Spec	https://www.w3.org/TR/beacon/
Status	W3C Candidate Recommendation

IE	Edge	Firefox	Chrome	Safari	Opera
			108
		107	107	TP
		106	106	16.1
11	105	105	105	16.0	91
10	104	104	104	15.6	90
9	103	103	103	15.5	89
8	102	102	102	15.4	88
Show all
7	101	101	101	15.2-15.3	87
6	100	100	100	15.1	86
5.5	99	99	99	15	85
	98	98	98	14.1	84
	97	97	97	14	83
	96	96	96	13.1	82
	95	95	95	13	81
	94	94	94	12.1	80
	93	93	93	12	79
	92	92	92	11.1	78
	91	91	91	11	77
	90	90	90	10.1	76
	89	89	89	10	75
	88	88	88	9.1	74
	87	87	87	9	73
	86	86	86	8	72
	85	85	85	7.1	71
	84	84	84	7	70
	83	83	83	6.1	69
	81	82	81	6	68
	80	81	80	5.1	67
	79	80	79	5	66
	18	79	78	4	65
	17	78	77	3.2	64
	16	77	76	3.1	63
	15	76	75		62
	14	75	74		60
	13	74	73		58
	12	73	72		57
		72	71		56
		71	70		55
		70	69		54
		69	68		53
		68	67		52
		67	66		51
		66	65		50
		65	64		49
		64	63		48
		63	62		47
		62	61		46
		61	60		45
		60	59		44
		59	58		43
		58	57		42
		57	56		41
		56	55		40
		55	54		39
		54	53		38
		53	52		37
		52	51		36
		51	50		35
		50	49		34
		49	48		33
		48	47		32
		47	46		31
		46	45		30
		45	44		29
		44	43		28
		43	42		27
		42	41		26
		41	40		25
		40	39		24
		39	38		23
		38	37		22
		37	36		21
		36	35		20
		35	34		19
		34	33		18
		33	32		17
		32	31		16
		31	30		15
		30	29		12.1
		29	28		12
		28	27		11.6
		27	26		11.5
		26	25		11.1
		25	24		11
		24	23		10.6
		23	22		10.5
		22	21		10.0-10.1
		21	20		9.5-9.6
		20	19		9
		19	18
		18	17
		17	16
		16	15
		15	14
		14	13
		13	12
		12	11
		11	10
		10	9
		9	8
		8	7
		7	6
		6	5
		5	4
		4
		3.6
		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
16.1
16.0	all	105	10	64	105	104	11	13.4	18.0	13.1	13.18	2.5
15.6		4.4.3-4.4.4	7	12.1			10		17.0
15.5		4.4		12					16.0
15.4		4.2-4.3		11.5					15.0
Show all
15.2-15.3		4.1		11.1					14.0
15.0-15.1		4		11					13.0
14.5-14.8		3		10					12.0
14.0-14.4		2.3							11.1-11.2
13.4-13.7		2.2							10.1
13.3		2.1							9.2
13.2									8.2
13.0-13.1									7.2-7.4
12.2-12.5									6.2-6.4
12.0-12.1									5.0-5.4
11.3-11.4									4
11.0-11.2
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
4.2-4.3
4.0-4.1
3.2

Notes

Bugs

• Safari 11.1 – 12.2 on macOS and iOS have a bug with sendBeacon in a pagehide event listener. Fixed in iOS 12.3.

• Safari 11.1 – 12 on iOS can’t sendBeacons to unvisited origins. Fixed in iOS 13.

• Safari on iOS won’t sendBeacons from pages that quickly redirect to another location.

Resources

• MDN Web Docs - Beacon