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

iOS Safari	Opera Mini	Android Browser	Blackberry Browser	Opera Mobile	Android Chrome	Android Firefox	IE Mobile	Android UC Browser	Samsung Internet	QQ Browser	Baidu Browser
11
10.3	all ⁽²⁾	56	10 ⁽¹⁾	37 ⁽¹⁾	59	54	11	11.4 ⁽¹⁾	5	1.2	7.12
10.0-10.2 ⁽¹⁾		4.4.3-4.4.4 ⁽¹⁾	7	12.1 ⁽²⁾			10		4 ⁽¹⁾
9.3 ⁽¹⁾		4.4 ⁽¹⁾		12
9.0-9.2 ⁽¹⁾		4.2-4.3 ⁽¹⁾		11.5
Show all
8.1-8.4 ⁽¹⁾		4.1 ⁽¹⁾		11.1
8 ⁽¹⁾		4 ⁽¹⁾		11
7.0-7.1 ⁽¹⁾		3		10
6.0-6.1		2.3
5.0-5.1		2.2
4.2-4.3		2.1
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.
http://caniuse.com/#feat=css-default-pseudo