зеркало из https://github.com/mozilla/gecko-dev.git
Bug 1480636: Add a WPT test for margin:auto centering behavior of absolutely-positioned tables. r=emilio,TYLin
The actual bug here was fixed by another commit from another bug. This patch is just adding a WPT test to ensure we've got test coverage. (In builds before the fix landed, e.g. Firefox Nightly 2021-01-01, this test renders with the table placed too high up. This leaves some red visible and covers up some of the descriptive text, which properly results in a test-failure.) Differential Revision: https://phabricator.services.mozilla.com/D149909
This commit is contained in:
Родитель
de373eee8c
Коммит
10e54a0cf4
|
@ -0,0 +1,44 @@
|
|||
<!DOCTYPE html>
|
||||
<meta charset="utf-8">
|
||||
<title>CSS Test: Abspos table centered in both axes with auto margins</title>
|
||||
<link rel="author" title="Daniel Holbert" href="mailto:dholbert@mozilla.com">
|
||||
<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1480636">
|
||||
<link rel="help" href="https://www.w3.org/TR/CSS21/visudet.html#abs-non-replaced-width">
|
||||
<meta name="assert" content="An absolutely-positioned fixed-size table should resolve auto margins the same way that a similarly-sized block would.">
|
||||
<link rel="match" href="../reference/ref-filled-green-100px-square.xht">
|
||||
<style>
|
||||
.container {
|
||||
/* I've chosen this position/size so that a 100px child element that's
|
||||
centered within us will be placed at our "normal" position (where our
|
||||
top-left corner would be, in the absence of relative positioning), so we
|
||||
can use the simple filled-green-100px-square reference case. */
|
||||
position: relative;
|
||||
left: -30px;
|
||||
top: -30px;
|
||||
width: 160px;
|
||||
height: 160px;
|
||||
}
|
||||
.target {
|
||||
display: block;
|
||||
background: red;
|
||||
}
|
||||
.table {
|
||||
display: table;
|
||||
background: green;
|
||||
}
|
||||
.centered {
|
||||
position: absolute;
|
||||
width: 100px;
|
||||
height: 100px;
|
||||
inset: 0;
|
||||
margin: auto; /* use auto margins for centering */
|
||||
}
|
||||
</style>
|
||||
<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>
|
||||
<div class="container">
|
||||
<!-- We're essentially just comparing the position of the block ("target")
|
||||
and the table. We expect them to be placed at precisely the same spot,
|
||||
so no red should be visible. -->
|
||||
<div class="centered target"></div>
|
||||
<div class="centered table"></div>
|
||||
</div>
|
Загрузка…
Ссылка в новой задаче