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<!DOCTYPE html>
<title>CSS Values Test: sign() in keyframes with relative units and font-size change</title>
<link rel="help" href="https://drafts.csswg.org/css-values/#sign-funcs">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
@font-face {
font-family: "COLR-test-font";
src: url("resources/COLR-palettes-test-font.ttf") format("truetype");
}
@font-palette-values --MyFirstPalette {
font-family: "COLR-test-font";
base-palette: 1;
}
@font-palette-values --MySecondPalette {
font-family: "COLR-test-font";
base-palette: 2;
}
@keyframes --a {
from {
scale: calc(1.5 + sign(1em - 10px));
rotate: calc(1.5deg + sign(1em - 10px) * 1deg);
text-size-adjust: calc(1.5% + sign(1em - 10px) * 1%);
font-style: oblique calc(1.5deg + sign(1em - 10px) * 1deg);
font-weight: calc((1.5 + sign(1em - 10px)) * 100);
font-palette: palette-mix(in lch, --MyFirstPalette calc(1.5% + 1% * sign(1em - 10px)), --MySecondPalette);
font-variation-settings: 'wght' calc((1.5 + sign(1em - 10px)) * 100);
}
to {
scale: 1;
rotate: 1deg;
text-size-adjust: 1%;
font-style: oblique 1deg;
font-weight: 100;
font-palette: palette-mix(in lch, --MyFirstPalette 1%, --MySecondPalette);
font-variation-settings: 'wght' 100;
}
}
#target {
animation-name: --a;
animation-duration: 1000s;
animation-timing-function: steps(2, start);
width: 100px;
height: 100px;
background: teal;
font-size: 8px;
}
</style>
<div id="target"></div>
<script>
test(() => {
assert_equals(getComputedStyle(target).scale, "0.75");
assert_equals(getComputedStyle(target).rotate, "0.75deg");
assert_equals(getComputedStyle(target).textSizeAdjust, "0.75%");
assert_equals(getComputedStyle(target).fontStyle, "oblique 0.75deg");
assert_equals(getComputedStyle(target).fontWeight, "75");
assert_equals(getComputedStyle(target).fontPalette, "palette-mix(in oklab, palette-mix(in lch, --MyFirstPalette 0.5%, --MySecondPalette), palette-mix(in lch, --MyFirstPalette 1%, --MySecondPalette))");
assert_equals(getComputedStyle(target).fontVariationSettings, '\"wght\" 75');
}, "Initially, the font-size is 8px for #target, so the result is 0.75");
test(() => {
target.style.fontSize = "16px";
assert_equals(getComputedStyle(target).scale, "1.75");
assert_equals(getComputedStyle(target).rotate, "1.75deg");
assert_equals(getComputedStyle(target).textSizeAdjust, "1.75%");
assert_equals(getComputedStyle(target).fontStyle, "oblique 1.75deg");
assert_equals(getComputedStyle(target).fontWeight, "175");
assert_equals(getComputedStyle(target).fontPalette, "palette-mix(in oklab, palette-mix(in lch, --MyFirstPalette 2.5%, --MySecondPalette), palette-mix(in lch, --MyFirstPalette 1%, --MySecondPalette))");
assert_equals(getComputedStyle(target).fontVariationSettings, '\"wght\" 175');
}, "Changing the font-size of #target changes the start point, so the result should be 1.75");
</script>
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