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