| <!doctype html> |
| <meta charset="utf-8"> |
| <!-- see “Selection regression tests” in README.md --> |
| <title>CSS Pseudo-Elements Test: ::selection background always paints over unselected parts when selecting text</title> |
| <link rel="author" name="Delan Azabani" href="mailto:dazabani@igalia.com"> |
| <link rel="help" href="https://drafts.csswg.org/css-pseudo-4/#highlight-painting"> |
| <link rel="help" href="https://drafts.csswg.org/css-text-decor-4/#painting"> |
| <link rel="help" href="https://www.w3.org/TR/CSS22/zindex.html#painting-order"> |
| <link rel="match" href="selection-background-painting-order-ref1.html"> |
| <link rel="match" href="selection-background-painting-order-ref2.html"> |
| <meta name="assert" value="This test verifies that when selecting text, the ::selection background always paints over unselected parts."> |
| <script src="support/selections.js"></script> |
| <link rel="stylesheet" href="support/highlights.css"> |
| <style> |
| @font-face { |
| font-family: CSSTest; |
| src: url(/fonts/CSSTest/csstest-basic-italic.ttf); |
| } |
| main { |
| font: 80px/1 CSSTest; |
| margin: 0.5em; |
| width: min-content; |
| } |
| main > span { |
| background: black; |
| color: orange; |
| } |
| main > span::selection { |
| /* |
| Safari on macOS: opaque selection backgrounds are made |
| translucent in the used value, so we need to choose a |
| background color with known but non-opaque alpha. |
| */ |
| background: #0000FFC0; |
| color: transparent; |
| } |
| </style> |
| <p>Test passes if the blue rectangle below contains no proper orange, only orange dimmed by blue. |
| <main class="highlight_reftest"><span>ii∫∫∫</span></main> |
| <script> |
| const target = document.querySelector("main > span"); |
| selectRangeWith(range => { |
| range.selectNodeContents(target); |
| range.setStart(target.childNodes[0], 0); |
| range.setEnd(target.childNodes[0], 3); |
| }); |
| </script> |
