:default CSS pseudo-class

The :default pseudo-class matches checkboxes and radio buttons which are checked by default, <option>s with the selected attribute, and the default submit button (if any) of a form.

Spec	https://drafts.csswg.org/selectors-4/#the-default-pseudo
Status	Unofficial / Note

IE	Edge	Firefox	Chrome	Safari	Opera
			103
		100	102
		99	101	TP
11	99	98	100	15.4	83
10	98	97	99	15.2-15.3	82
9	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 ⁽¹⁾	70
	85	84	86	9.1 ⁽¹⁾	69
	84	83	85	9 ⁽¹⁾	68
	83	82	84	8 ⁽¹⁾	67
	81	81	83	7.1 ⁽¹⁾	66
	80	80	81	7 ⁽¹⁾	65
	79	79	80	6.1 ⁽¹⁾	64
	18	78	79	6 ⁽¹⁾	63
	17	77	78	5.1 ⁽¹⁾	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 ⁽¹⁾
		53	54		36 ⁽¹⁾
		52	53		35 ⁽¹⁾
		51	52		34 ⁽¹⁾
		50	51		33 ⁽¹⁾
		49	50 ⁽¹⁾		32 ⁽¹⁾
		48	49 ⁽¹⁾		31 ⁽¹⁾
		47	48 ⁽¹⁾		30 ⁽¹⁾
		46	47 ⁽¹⁾		29 ⁽¹⁾
		45	46 ⁽¹⁾		28 ⁽¹⁾
		44	45 ⁽¹⁾		27 ⁽¹⁾
		43	44 ⁽¹⁾		26 ⁽¹⁾
		42	43 ⁽¹⁾		25 ⁽¹⁾
		41	42 ⁽¹⁾		24 ⁽¹⁾
		40	41 ⁽¹⁾		23 ⁽¹⁾
		39	40 ⁽¹⁾		22 ⁽¹⁾
		38	39 ⁽¹⁾		21 ⁽¹⁾
		37	38 ⁽¹⁾		20 ⁽¹⁾
		36	37 ⁽¹⁾		19 ⁽¹⁾
		35	36 ⁽¹⁾		18 ⁽¹⁾
		34	35 ⁽¹⁾		17 ⁽¹⁾
		33	34 ⁽¹⁾		16 ⁽¹⁾
		32	33 ⁽¹⁾		15 ⁽¹⁾
		31	32 ⁽¹⁾		12.1 ⁽²⁾
		30	31 ⁽¹⁾		12 ⁽²⁾
		29	30 ⁽¹⁾		11.6 ⁽²⁾
		28	29 ⁽¹⁾		11.5
		27	28 ⁽¹⁾		11.1
		26	27 ⁽¹⁾		11
		25	26 ⁽¹⁾		10.6
		24	25 ⁽¹⁾		10.5
		23	24 ⁽¹⁾		10.0-10.1
		22	23 ⁽¹⁾		9.5-9.6
		21	22 ⁽¹⁾		9
		20	21 ⁽¹⁾
		19	20 ⁽¹⁾
		18	19 ⁽¹⁾
		17	18 ⁽¹⁾
		16	17 ⁽¹⁾
		15	16 ⁽¹⁾
		14	15 ⁽¹⁾
		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
15.4	all ⁽²⁾	99	10 ⁽¹⁾	64	100	98	11	12.12 ⁽¹⁾	16.0	10.4	7.12	2.5
15.2-15.3		4.4.3-4.4.4 ⁽¹⁾	7	12.1 ⁽²⁾			10		15.0
15.0-15.1		4.4 ⁽¹⁾		12					14.0
14.5-14.8		4.2-4.3 ⁽¹⁾		11.5					13.0
Show all
14.0-14.4		4.1 ⁽¹⁾		11.1					12.0
13.4-13.7		4 ⁽¹⁾		11					11.1-11.2
13.3		3		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 ⁽¹⁾
10.3
10.0-10.2 ⁽¹⁾
9.3 ⁽¹⁾
9.0-9.2 ⁽¹⁾
8.1-8.4 ⁽¹⁾
8 ⁽¹⁾
7.0-7.1 ⁽¹⁾
6.0-6.1
5.0-5.1
4.2-4.3
4.0-4.1
3.2

Notes

Whether <option selected> matches :default (per the spec) was not tested since <select>s and <option>s are generally not styleable, which makes it hard to formulate a test for this.

Does not match <input type="checkbox" checked> or <input type="radio" checked>
Does not match the default submit button of a form

Resources

Data by caniuse.com
Licensed under the Creative Commons Attribution License v4.0.
https://caniuse.com/css-default-pseudo

Name	Support Tables
Version
Badge
Last Updated	2022-04-11T17:49:08Z