CSS1 Support Comparison Grid

Please feel free to conduct your own tests and mail eam3@po.cwru.edu with the results. If you find inaccuracies in this table, please mail me about those as well. Thank you.

Last updated: 25 June 1997

Grid Key

Columns

IE301	Microsoft Internet Explorer 3.01
NS401	Netscape Navigator 4.01
U	Unsupported element/attribute
P	Partially supported element/attribute
S	Supported element/attribute
B	Bugs are present in support of this element/attribute
?	The status of this element/attribute is not known

In table entries:

the section number given for each element is a hyperlink to the relevant section of the CSS1 specification.
properties marked with a star ("*") are not supposed to be inherited
entries preceded by three dots (...) are values of the last bracketed entry
entries including a dash (-) indicate a range of values not explicitly listed; in these cases, only the extremes are given

Pseudo-Classes and Pseudo-Elements

CSS1 Element		IE301	NS401
2.1	anchor	B	S
2.3	first-line	B	U
2.4	first-letter	B	U

Font Properties
CSS1 Element		IE301	NS401
5.2.2	font-family	S	S
	<family-name>	S	S
	<generic-family>	S	S
	... serif	S	S
	... sans-serif	B	S
	... cursive	U	S
	... fantasy	U	S
	... monospace	S	S
5.2.3	font-style	S	S
	normal	U	S
	italic	S	S
	oblique	U	U
5.2.4	font-variant	U	U
	normal	U	U
	small-caps	U	U
5.2.5	font-weight	S	S
	normal	S	S
	bold	S	U
	bolder	U	U
	lighter	S	U
	100 - 900	U	S
5.2.6	font-size	S	S
	<absolute-size>	S	S
	... xx-small - xx-large	S	S
	<relative-size>	U	S
	... larger	U	S
	... smaller	U	S
	<length>	S	P
	<percentage>	S	S
5.2.7	font	S	S
	<font-family>	S	S
	<font-style>	S	S
	<font-variant>	U	U
	<font-weight>	S	S
	<font-size>	S	S
	<line-height>	S	B

Color and Background Properties
CSS1 Element		IE301	NS401
5.3.1	color	S	S
	<color>	S	S
5.3.2	background-color*	U	S
	<color>	S	S
	transparent	S	S
5.3.3	background-image*	U	S
	<url>	P	S
	none	S	U
5.3.4	background-repeat*	U	S
	repeat	S	S
	repeat-x	S	S
	repeat-y	S	S
	no-repeat	S	S
5.3.5	background-attachment*	U	U
	scroll	S	U
	fixed	S	U
5.3.6	background-position*	U	U
	<percentage>	S	U
	<length>	U	U
	top	S	U
	center	S	U
	bottom	S	U
	left	S	U
	right	S	U
5.3.7	background*	S	S
	<background-color>	S	S
	<background-image>	S	S
	<background-repeat>	P	S
	<background-attachment>	S	S
	<background-position>	S	U

Text Properties
CSS1 Element		IE301	NS401
5.4.1	word-spacing	U	U
	normal	U	U
	<length>	U	U
5.4.2	letter-spacing	U	U
	normal	U	U
	<length>	U	U
5.4.3	text-decoration*	S	S
	none	S	S
	underline	S	S
	overline	U	U
	line-through	S	S
	blink	U	S
5.4.4	vertical-align*	U	U
	baseline	U	U
	sub	U	U
	super	U	U
	top	U	U
	text-top	U	U
	middle	U	U
	bottom	U	U
	text-bottom	U	U
	<percentage>	U	U
5.4.5	text-transform	U	S
	capitalize	U	S
	uppercase	U	S
	lowercase	U	S
	none	U	S
5.4.6	text-align	S	S
	left	S	S
	right	S	S
	center	S	S
	justify	U	S
5.4.7	text-indent	S	S
	<length>	S	S
	<percentage>	S	S
5.4.8	line-height	S	S
	normal	S	U
	<number>	B	S
	<length>	S	P
	<percentage>	B	S

Box Properties
CSS1 Element		IE301	NS401
5.5.01	margin-top*	B	S
	<length>	B	S
	<percentage>	B	S
	auto	B	S
5.5.02	margin-right*	S	S
	<length>	S	S
	<percentage>	S	S
	auto	S	S
5.5.03	margin-bottom*	U	S
	<length>	U	S
	<percentage>	U	S
	auto	U	S
5.5.04	margin-left*	S	S
	<length>	S	S
	<percentage>	S	S
	auto	S	S
5.5.05	margin*	B	S
	<length>	B	S
	<percentage>	B	S
	auto	B	S
5.5.06	padding-top*	U	B
	<length>	U	S
	<percentage>	U	S
5.5.07	padding-right*	U	B
	<length>	U	S
	<percentage>	U	S
5.5.08	padding-bottom*	U	B
	<length>	U	S
	<percentage>	U	S
5.5.09	padding-left*	U	B
	<length>	U	S
	<percentage>	U	S
5.5.10	padding*	U	B
	<length>	U	S
	<percentage>	U	S
5.5.11	border-top-width*	U	B
	thin	U	S
	medium	U	S
	thick	U	S
	<length>	U	S
5.5.12	border-right-width*	U	B
	thin	U	S
	medium	U	S
	thick	U	S
	<length>	U	S
5.5.13	border-bottom-width*	U	B
	thin	U	S
	medium	U	S
	thick	U	S
	<length>	U	S
5.5.14	border-left-width*	U	B
	thin	U	S
	medium	U	S
	thick	U	S
	<length>	U	S
5.5.15	border-width*	U	S
	thin	U	S
	medium	U	S
	thick	U	S
	<length>	U	S
5.5.16	border-color*	U	S
	<color>	U	S
5.5.17	border-style*	U	B
	none	U	?
	dotted	U	U
	dashed	U	U
	solid	U	S
	double	U	S
	groove	U	S
	ridge	U	S
	inset	U	S
	outset	U	S
5.5.18	border-top*	U	U
	<border-top-width>	U	U
	<border-style>	U	U
	<color>	U	U
5.5.19	border-right*	U	U
	<border-right-width>	U	U
	<border-style>	U	U
	<color>	U	U
5.5.20	border-bottom*	U	U
	<border-bottom-width>	U	U
	<border-style>	U	U
	<color>	U	U
5.5.21	border-left*	U	U
	<border-left-width>	U	U
	<border-style>	U	U
	<color>	U	U
5.5.22	border*	U	S
	<border-width>	U	S
	<border-style>	U	S
	<color>	U	S
5.5.23	width*	U	P
	<length>	U	P
	<percentage>	U	P
	auto	U	S
5.5.24	height*	U	P
	<length>	U	P
	auto	U	U
5.5.25	float*	U	S
	left	U	S
	right	U	S
	none	U	?
5.5.26	clear*	U	S
	none	U	U
	left	U	S
	right	U	S
	both	U	S

Classification Properties
CSS1 Element		IE301	NS401
5.6.1	display*	U	S
	block	U	S
	inline	U	S
	list-item	U	S
	none	U	S
5.6.2	white-space	U	S
	normal	U	S
	pre	U	S
	nowrap	U	U
5.6.3	list-style-type	U	S
	disc	U	S
	circle	U	S
	square	U	S
	decimal	U	S
	lower-roman	U	S
	upper-roman	U	S
	lower-alpha	U	S
	upper-alpha	U	S
	none	U	S
5.6.4	list-style-image	U	U
	<url>	U	U
	none	U	U
5.6.5	list-style-position	U	U
	inside	U	U
	outside	U	U
5.6.6	list-style	U	S
	<keyword>	U	S
	<position>	U	U
	<url>	U	U

Units
CSS1 Element		IE301	NS401
6.1	Length Units	S	S
	em	S	S
	ex	S	S
	px	S	S
	in	S	S
	cm	S	S
	mm	S	S
	pt	S	S
	pc	S	S
6.2	Percentage Units	S	S
	<percentage>	S	S
6.3	Color Units	S	S
	#000	S	S
	#000000	S	S
	(RRR,GGG,BBB)	U	S
	(R%,G%,B%)	U	S
6.4	URLs	P	S
	<url>	P	S

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