LibWeb: Generate ::backdrop pseudo-elements

This commit is contained in:
Gingeh 2025-04-07 18:39:32 +10:00 committed by Sam Atkins
commit 4b9f5c6fb8
Notes: github-actions[bot] 2025-04-09 11:11:48 +00:00
11 changed files with 145 additions and 2 deletions

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<!DOCTYPE html>
<body>
Test that ::backdrop is not shown for non-open or non-modal dialogs.
The test passes if there is no red shown.
</body>

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<!DOCTYPE html>
<style>
.dialog-default-ua-style {
position: absolute;
overflow: auto;
top: 0;
right: 0;
bottom: 0;
left: 0;
margin: auto;
border: solid;
padding: 1em;
background: white;
color: black;
}
#dialog {
margin: auto;
height: 100px;
width: 100px;
top: 100px;
z-index: 1000;
background: green;
}
#backdrop {
position: fixed;
top: 0;
left: 0;
right: 0;
bottom: 0;
background: rgba(0,0,0,0.1);
z-index: 100;
}
</style>
<body>
Test for the default user agent style of dialog::backdrop. The test passes if
there is a green box, above a very lightly translucent gray box spanning the
viewport.
<div id="backdrop"></div>
<div class="dialog-default-ua-style" id="dialog"></div>
</body>