Custom protocol handling

Method of allowing a webpage to handle a given protocol using navigator.registerProtocolHandler. This allows certain URLs to be opened by a given web application, for example mailto: addresses can be opened by a webmail client.

Spec	https://html.spec.whatwg.org/multipage/webappapis.html#custom-handlers
Status	WHATWG Living Standard

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

Supports protocols mailto, mms, nntp, rtsp, and webcal but requires custom protocols to start with web+

Resources

MDN Web Docs - Register protocol handler

Data by caniuse.com
Licensed under the Creative Commons Attribution License v4.0.
https://caniuse.com/registerprotocolhandler