/
system-color-support.html
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/
system-color-support.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>CSS Color 4: System color support</title>
<link rel="author" title="Luuk Lamers" href="mailto:xaddict@protonmail.com">
<link rel="help" href="https://www.w3.org/TR/css-color-4/#css-system-colors">
<meta name="assert" content="system colors as defined are supported by the browser">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
.group {
display: flex;
margin-bottom: 2px;
gap: 1em;
}
.group > div {
height: 1em;
width: 50%;
}
</style>
</head>
<body>
<div style="display: none">
<div id="test"></div>
</div>
<script>
const testRoot = document.getElementById('test')
const SYSTEM_COLORS = [
'Canvas',
'CanvasText',
'LinkText',
'VisitedText',
'ActiveText',
'ButtonFace',
'ButtonText',
'ButtonBorder',
'Field',
'FieldText',
'Highlight',
'HighlightText',
'SelectedItem',
'SelectedItemText',
'Mark',
'MarkText',
'GrayText',
'AccentColor',
'AccentColorText',
'AppWorkspace',
'Scrollbar',
];
// These colors ought to be color-scheme aware.
const COLOR_SCHEME_AWARE = [
'Canvas',
'CanvasText',
'AppWorkspace',
'Scrollbar',
'ButtonFace',
'ButtonText',
'LinkText',
'VisitedText',
'Highlight',
'SelectedItem',
'Field',
'FieldText',
];
for (let systemColor of SYSTEM_COLORS) {
const group = document.createElement('div')
group.id = systemColor
group.className = 'group'
group.innerHTML = `
<div style="background-color: black; background-color: ${systemColor}"></div>
<div style="background-color: white; background-color: ${systemColor}"></div>
`
testRoot.appendChild(group)
let blackElement = group.firstElementChild
let whiteElement = group.lastElementChild
test(function() {
assert_equals(
getComputedStyle(blackElement).backgroundColor,
getComputedStyle(whiteElement).backgroundColor,
`${systemColor} should be parsed`
);
if (COLOR_SCHEME_AWARE.includes(systemColor)) {
blackElement.style.colorScheme = "light";
whiteElement.style.colorScheme = "dark";
assert_not_equals(
getComputedStyle(blackElement).backgroundColor,
getComputedStyle(whiteElement).backgroundColor,
`${systemColor} should react to color-scheme`
);
}
}, `System color ${systemColor} works`);
}
</script>
</body>
</html>