Resource Hints: preload

Using <link rel="preload">, browsers can be informed to prefetch resources without having to execute them, allowing fine-grained control over when and how resources are loaded.

Spec	https://w3c.github.io/preload/
Status	W3C Candidate Recommendation

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 ⁽²⁾	72
	86	84 ⁽³⁾	86	10.1	71
	85	83 ⁽³⁾	85	10	70
	84	82 ⁽³⁾	84	9.1	69
	83	81 ⁽³⁾	83	9	68
	81	80 ⁽³⁾	81	8	67
	80	79 ⁽³⁾	80	7.1	66
	79	78 ⁽³⁾	79	7	65
	18 ⁽⁴⁾	77 ⁽³⁾	78	6.1	64
	17 ⁽⁴⁾	76 ⁽³⁾	77	6	63
	16	75 ⁽³⁾	76	5.1	62
	15	74 ⁽³⁾	75	5	60
	14	73 ⁽³⁾	74	4	58
	13	72 ⁽³⁾	73	3.2	57
	12	71 ⁽³⁾	72	3.1	56
		70 ⁽³⁾	71		55
		69 ⁽³⁾	70		54
		68 ⁽³⁾	69		53
		67 ⁽³⁾	68		52
		66 ⁽³⁾	67		51
		65 ⁽³⁾	66		50
		64 ⁽³⁾	65		49
		63 ⁽³⁾	64		48
		62 ⁽³⁾	63		47
		61 ⁽³⁾	62		46
		60 ⁽³⁾	61		45
		59 ⁽³⁾	60		44
		58 ⁽³⁾	59		43
		57 ⁽³⁾	58		42
		56 ⁽¹⁾	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	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 ⁽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

Only cachable resources can be preloaded. This includes the following as values: script, style, image, video, audio, track, fetch, and font (note font/collection is not supported).
Can be enabled via the "Experimental Features" developer menu
Disabled by default behind the network.preload flag.
Partial support in Edge 17+ refers to support for only the HTML <link rel> format, not the HTTP header format.

Resources

Data by caniuse.com
Licensed under the Creative Commons Attribution License v4.0.
https://caniuse.com/link-rel-preload