1 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
2 <html>
3
4 <head>
5
6 <title>CSS Test: Solving 'width: auto' of a block-level non-replaced element in normal flow with one other property set to an 'auto' value</title>
7
8 <link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/">
9 <link rel="help" title="10.3.3 Block-level, non-replaced elements in normal flow" href="http://www.w3.org/TR/CSS21/visudet.html#blockwidth">
10 <meta content="" name="flags">
11 <meta content="If 'width' is set to 'auto', any other 'auto' values become '0' and the determination of 'width' proceeds from the following equality: 'margin-left' + 'border-left-width' + 'padding-left' + 'width' + 'padding-right' + 'border-right-width' + 'margin-right' = width of containing block" name="assert">
12
13 <style type="text/css">
14 div {height: 200px;}
15
16 div#containing-block
17 {
18 border-right: red solid 200px;
19 padding-right: 200px;
20 width: 0px;
21 }
22
23 div#child
24 {
25 border-right: green solid 200px;
26 margin-right: -400px;
27 }
28
29 /*
30 Calculation of used width for div#child:
31
32 margin-left : 0px (or auto)
33 + border-left-width : 0px
34 + padding-left : 0px
35 + width : auto
36 + padding-right : 0px
37 + border-right-width : 200px
38 + margin-right : -400px
39 ====================================
40 width of containing block : 0px
41
42 Therefore 'width: auto' must be resolved as 'width: 200px'.
43 Therefore div#child's green border-right should overlap perfectly
44 div#containing-block's red border-right.
45 */
46 </style>
47
48 </head>
49
50 <body>
51
52 <p>Test passes if there is a filled green square below and <strong>no red</strong>.</p>
53
54 <div id="containing-block">
55 <div id="child"></div>
56 </div>
57
58 </body>
59 </html>