Web Sockets

Bidirectional communication technology for web apps

Spec	https://html.spec.whatwg.org/multipage/comms.html#network
Status	WHATWG Living Standard

IE	Edge	Firefox	Chrome	Safari	Opera
		57	62
		56	61	TP	48
	16	55	60	11	47
11	15	54	59	10.1	46
10	14	53	58	10	45
9	13	52	57	9.1	44
8	12	51	56	9	43
Show all
7		50	55	8	42
6		49	54	7.1	41
5.5		48	53	7	40
		47	52	6.1 ⁽²⁾	39
		46	51	6 ⁽²⁾	38
		45	50	5.1 ⁽¹⁾	37
		44	49	5 ⁽¹⁾	36
		43	48	4	35
		42	47	3.2	34
		41	46	3.1	33
		40	45		32
		39	44		31
		38	43		30
		37	42		29
		36	41		28
		35	40		27
		34	39		26
		33	38		25
		32	37		24
		31	36		23
		30	35		22
		29	34		21
		28	33		20
		27	32		19
		26	31		18
		25	30		17
		24	29		16
		23	28		15
		22	27		12.1
		21	26		12 ⁽¹⁾
		20	25		11.6 ⁽¹⁾
		19	24		11.5 ⁽¹⁾
		18	23		11.1 ⁽¹⁾
		17	22		11 ⁽¹⁾
		16	21		10.6
		15	20		10.5
		14	19		10.0-10.1
		13	18		9.5-9.6
		12	17		9
		11	16
		10 ^(2,*)	15 ⁽²⁾
		9 ^(2,*)	14 ⁽¹⁾
		8 ^(2,*)	13 ⁽¹⁾
		7 ^(2,*)	12 ⁽¹⁾
		6 ^(2,*)	11 ⁽¹⁾
		5 ⁽¹⁾	10 ⁽¹⁾
		4 ⁽¹⁾	9 ⁽¹⁾
		3.6	8 ⁽¹⁾
		3.5	7 ⁽¹⁾
		3	6 ⁽¹⁾
		2	5 ⁽¹⁾
			4 ⁽¹⁾

Notes

Reported to be supported in some Android 4.x browsers, including Sony Xperia S, Sony TX and HTC.

Partial support in older browsers refers to the websockets implementation using an older version of the protocol and/or the implementation being disabled by default (due to security issues with the older protocol).
Partial support in older browsers refers to lacking support for binary data.

^* Partial support with prefix.

Data by caniuse.com
Licensed under the Creative Commons Attribution License v4.0.
http://caniuse.com/#feat=websockets