Results of my CSS tests

These are test pages that I have written for various reasons - usually to see whether certain features are implemented in any browsers or to test known features in certain browsers. They cover some sections of CSS2 much more completely than others. Warning: These tests may crash your browser or your whole computer. Use caution when testing.

Key

U Unknown (either because the test isn't written yet, I haven't tested that browser yet, or I don't know the correct result)
Y Yes. (i.e., entirely supported)
N Not Supported†
P Partially Supported†
B Buggy
BB Buggy in a way much more serious than the other browsers marked as buggy.
D Destroys feature. That is, it's not implemented, but buggy error handling causes bizarre interpretation.†
M Maybe (i.e, other bugs prevent proper testing)
C Crashes
x Lowercase letters, such as b, show very minor bugs.
(X) I disagree with the spec, and the result would be different if the spec were the way I want it.

† - Not possible on tests of “basic features.”

The Results

Note: Not all of my test pages are listed here. Those not testable are listed below.

Browser Mozilla Opera Opera MSIE NNav WebTV Specs Tested
Version 99-07-01 / 99-04-07, etc. 3.51 3.60 5.0 4.5 1.1, b229
Platform Linux & Windows Windows Windows Windows Linux & Windows Windows
HTML Implied elements test* Y M M M B B HTML4
Styling of form elements U U U U U U
3.2 CSS2 Conformance - alternate stylesheets y N N N N N CSS2
3.2 CSS2 Conformance - loading errors* Y Y Y Y B Y CSS2
4.1.2 Keywords Y U U U U U CSS1, CSS2
4.1.3 Case sensitivity of id and class Y U Y B B B HTML4
4.3.2 ex unit test B B B B M N CSS1
4.3.2 em unit test B Y Y M M N CSS1
4.3.10 Strings Y U U U U U CSS1, CSS2
5.3 The CSS2 Universal Selector Y P P P N N CSS2
5.6 The CSS2 Child Selector Y B B D N B CSS2
5.7 CSS2 Adjacent Sibling Selectors Y2 P P D N D CSS2
5.8 CSS2 Attribute Selectors Y N N d N N CSS2
5.9 ID selectors in XML U U U U U U CSS2
5.3, 5.10 Pseudo-element tests Y U B P B B CSS2 (and 1?)
5.10 Pseudo-element tests 2 Y U U U U U CSS2
5.11.1 CSS2 :first-child Selector Y N N N N D CSS2
5.11.3 Dynamic pseudo-classes on links Y P? B B B P CSS1, CSS2
5.11.3 Dynamic pseudo-classes on elements other than links B U U U U U CSS2
Test for Lack of Order Dependence* Y Y Y Y M M CSS1
6.2.1 CSS inherit Test Y P P N D B CSS2
6.4.2 Test of !important grammar Y Y Y Y N Y CSS1, CSS2
6.4.3 Inline style specificity test* (B) (B) B (B) BB BB CSS1
6.4.4 Non-CSS Presentational Hints Test 1 b B B Y B U CSS1
6.4.4 Non-CSS Presentational Hints Test 2 B/U B B B N N CSS1
Unitless Numbers Test* B Y Y B B N CSS1
CSS Parsing Test* Y B B B B B CSS2 (and 1?)
CSS Parsing Test 2 Y U B B B B CSS2 (and 1?)
CSS Character Escapes Y D D N D D CSS1, CSS2
CSS Parsing Test 4 Y U U U U U CSS1
CSS Parsing Test 5 Y U U U U U CSS1
6.4.3 Specificity Base Test* Y B Y Y Y B CSS1
5.8.3, 6.4.1 CSS with multiple classes Y Y Y Y N N HTML4
html and body box properties A U U U U U CSS1
List Box Properties (Y) (Y) (Y) Y B N CSS1, CSS2
Shorthand Box Properties Test Y Y Y M M N CSS1
Shorthand Box Properties Test 2 Y Y Y M M N CSS1
8.5 Shorthand Border Properties Test Y U Y Y B N CSS1
8.5 Border Properties Test U U U U U U CSS1, CSS2
Zero Margins Test M m m M B N CSS1
9.1.2 Initial Containing Block U U U U U U CSS2
9.2.1 Block Boxes Y Y Y Y B N CSS1, CSS2
9.2.3 Compact Boxes N1 N N N N N CSS2
9.2.4 Run-in Boxes N1 N N N N N CSS2
9.2.5 Test of display: none Y/ Y Y Y Y N CSS1, CSS2 or HTML40
9.3.1 Positioning B N N BB B N CSS2
9.3.2 Test of top B N N B BB N CSS2
9.3.2 Test of right b N N b BB N CSS2
9.3.2 Test of bottom B N N B BB N CSS2
9.3.2 Test of left b N N b BB N CSS2
9.5 Stacking order on floats U U U U U U CSS1 (?), CSS2
9.5.1 My original CSS1 section 4.1.4 test (B) B B B B N CSS1
9.5.1 Float Positioning Test 2 B U BB Y BBB N CSS1
9.7 Relationships between display, position, and float. U U U U U U CSS2
9.9 Layered presentation U U U U U U CSS2
9.10 Bidirectional Test P N N Y N N CSS2
10.1 Containing blocks of block level and floating elements b U b B BB B CSS1, CSS2
10.1 Containing blocks of fixed elements B U N BB BB D CSS2
10.1 Containing blocks of absolutely positioned elements with block-level positioned ancestors b U N B BB D?? CSS2
10.1 Containing blocks of absolutely positioned elements with inline-level positioned ancestors U U U U U D CSS2
10.1 Containing blocks of absolutely positioned elements without positioned ancestors U U U U U U CSS2
10.3.1 Widths and margins of inline, non-replaced elements Y P P B BB BB CSS1, CSS2
10.3.2 Widths and margins of inline, replaced elements Y BB BB Y BB U CSS1, CSS2
10.3.3 Widths and margins of block-level, non-replaced elements Y U P B M U CSS1, CSS2
10.3.4 Widths and margins of block-level, replaced elements Y B B B (P?) M U CSS1, CSS2
10.3.5 Widths and margins of floating, non-replaced elements B U BB BB M U CSS1, CSS2
10.3.7 Widths and margins of absolutely positioned, non-replaced elements U U U U U U CSS2
10.6.4 Heights and margins of absolutely positioned, non-replaced elements U U U U U U CSS2
10.4 Maximum and Minimum Widths Y N N N M U CSS2
10.4 Maximum and Minimum Width Recalculations U U U U U U CSS2
10.7 Maximum and Minimum Heights Y N N N M U CSS2
10.7 Maximum and Minimum Width Recalculations U U U U U U CSS2
Inheritance of width and height on absolutely positioned elements U U U U U U CSS2
Line Box Test 1 Y B B Y M U CSS1, CSS2
Line Box Test 2 Y B B B B U CSS1, CSS2
line-height Inheritence Test and Line Box Test 3 - inheritance Y Y Y Y B U CSS1
line-height Inheritence Test and Line Box Test 3 - line boxes B Y Y B B U CSS1, CSS2
Line Box Test 4 B BB BB B BB U CSS1, CSS2
Inline Display Test b B B N BB U CSS1, CSS2
11.1 The overflow and clip properties U U U U U U CSS2
11.1.2 The clip property U U U U U U CSS2
11.1.2 The clip property U U U U U U CSS2
11.2 The visibility property U U U U U U CSS2
11.2 The visibility property U U U U U U CSS2
12.1 The :before and :after pseudo-elements P N N N N U CSS2
12.2 The content property U U U U U U CSS2
14.2.1 The 'background-image' property U U U U U U CSS1(, CSS2)?
15.2.3 The font-stretch property N N N N N U CSS2
16.3.2 Text Shadow Test N N N N N U CSS2
17.2 Table display types U U U U U U CSS2
17.2.1 Anonymous Table Objects B U N N N U CSS2
17.4 Tables and captions U U U U U U CSS2
17.4 Anonymous box around caption and table U U U U U U CSS2
17.4.1 Caption position and alignment U U U U U U CSS2
17.5.1 Table layers and transparency B U P (Y) B U CSS2
17.5.1 Table layers and transparency B U P B B U CSS2
17.5.1 Table layers and transparency B U B B B U CSS2
17.5.2 table-layout: fixed U U U U U U CSS2
17.5.3 Vertical alignment and table height U U U U U U CSS2
17.5.4 Horizontal alignment and table width U U U U U U CSS2
17.6 Table Border Test 1 b N N B N U CSS2
17.6 Table Border Test 2 B N N N N U CSS2
17.6 Simple collapsing table borders U U U U U U CSS2
18.1 The cursor property U U U U U U CSS2
18.2 UI colors U U U U U U CSS2
18.3 UI fonts U U U U U U CSS2
18.4 The outline property U U U U U U CSS2
Font Sizes B U B B B U CSS1
Tests Y (+1) 34   16 16 2 U
Tests N (0) 4   21 14 18 U
Tests P (+0.5) 2   7 2 0 U
Tests B (-0.5) 27   20 28 35 U
Tests D (-2) 0   1 3 2 U
Tests M (-0.5) 1   2 5 11 U
Tests C (-4) 0   0 0 0 U
Total Points (as of 1999-05-20) 21   6.5 -5.5 -25 U

* “Basic feature,” i.e., it is not possible not to support this.

† earliest spec for each feature tested; judgment approxmate

1 Supported in earlier builds, but feature now removed.

2 This result depends on a definition of adjacent sibling elements that is not in the spec, but does make sense.

Test pages not listed above

Old versions of this page


Valid HTML 4.0!

(Back to CSS Testing Information, David Baron)

LDB, dbaron@dbaron.org