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<!doctype html>
<meta charset="utf-8">
<title>CSS Test: font shorthand serialization with font-stretch values</title>
<link rel="help" href="https://drafts.csswg.org/css-fonts-4/#propdef-font">
<link rel="help" href="https://drafts.csswg.org/cssom-1/#serializing-css-values">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<div id="test" style="font: medium serif"></div>
<script>
test(function() {
const div = document.getElementById("test");
div.style.fontStretch = "ultra-condensed";
assert_equals(div.style.fontStretch, "ultra-condensed");
assert_equals(div.style.font, "ultra-condensed medium serif");
div.style.fontStretch = "extra-condensed";
assert_equals(div.style.fontStretch, "extra-condensed");
assert_equals(div.style.font, "extra-condensed medium serif");
div.style.fontStretch = "condensed";
assert_equals(div.style.fontStretch, "condensed");
assert_equals(div.style.font, "condensed medium serif");
div.style.fontStretch = "semi-condensed";
assert_equals(div.style.fontStretch, "semi-condensed");
assert_equals(div.style.font, "semi-condensed medium serif");
div.style.fontStretch = "normal";
assert_equals(div.style.fontStretch, "normal");
assert_equals(div.style.font, "medium serif", "The keyword normal should be omitted");
div.style.fontStretch = "semi-expanded";
assert_equals(div.style.fontStretch, "semi-expanded");
assert_equals(div.style.font, "semi-expanded medium serif");
div.style.fontStretch = "expanded";
assert_equals(div.style.fontStretch, "expanded");
assert_equals(div.style.font, "expanded medium serif");
div.style.fontStretch = "extra-expanded";
assert_equals(div.style.fontStretch, "extra-expanded");
assert_equals(div.style.font, "extra-expanded medium serif");
div.style.fontStretch = "ultra-expanded";
assert_equals(div.style.fontStretch, "ultra-expanded");
assert_equals(div.style.font, "ultra-expanded medium serif");
}, "Keywords should appear in serialization of font and fontStretch");
test(function() {
const div = document.getElementById("test");
div.style.fontStretch = "50%";
assert_equals(div.style.fontStretch, "50%");
assert_equals(div.style.font, "ultra-condensed medium serif");
div.style.fontStretch = "62.5%";
assert_equals(div.style.fontStretch, "62.5%");
assert_equals(div.style.font, "extra-condensed medium serif");
div.style.fontStretch = "75%";
assert_equals(div.style.fontStretch, "75%");
assert_equals(div.style.font, "condensed medium serif");
div.style.fontStretch = "87.5%";
assert_equals(div.style.fontStretch, "87.5%");
assert_equals(div.style.font, "semi-condensed medium serif");
div.style.fontStretch = "100%";
assert_equals(div.style.fontStretch, "100%");
assert_equals(div.style.font, "medium serif", "The keyword normal should be omitted");
div.style.fontStretch = "112.5%";
assert_equals(div.style.fontStretch, "112.5%");
assert_equals(div.style.font, "semi-expanded medium serif");
div.style.fontStretch = "125%";
assert_equals(div.style.fontStretch, "125%");
assert_equals(div.style.font, "expanded medium serif");
div.style.fontStretch = "150%";
assert_equals(div.style.fontStretch, "150%");
assert_equals(div.style.font, "extra-expanded medium serif");
div.style.fontStretch = "200%";
assert_equals(div.style.fontStretch, "200%");
assert_equals(div.style.font, "ultra-expanded medium serif");
div.style.fontStretch = "50.00000%";
assert_equals(div.style.fontStretch, "50%");
assert_equals(div.style.font, "ultra-condensed medium serif");
}, "Percentages which can be transformed into keywords should be for serialization of font, but not of fontStretch");
test(function() {
const div = document.getElementById("test");
div.style.fontStretch = "25%";
assert_equals(div.style.fontStretch, "25%");
assert_equals(div.style.font, "");
div.style.fontStretch = "101%";
assert_equals(div.style.fontStretch, "101%");
assert_equals(div.style.font, "");
div.style.fontStretch = "50.01%";
assert_equals(div.style.fontStretch, "50.01%");
assert_equals(div.style.font, "");
}, "Percentages which cannot be transformed into keywords should prevent the font shorthand from serializing, but not fontStretch");
test(function() {
const div = document.getElementById("test");
// This isn't well-specified, but appears to be consistent across browsers.
div.style.fontStretch = "calc(50%)";
assert_equals(div.style.fontStretch, "calc(50%)");
assert_equals(div.style.font, "ultra-condensed medium serif");
div.style.fontStretch = "calc(50% + 25% * sign(100em - 1px))";
assert_equals(div.style.fontStretch, "calc(50% + (25% * sign(100em - 1px)))");
assert_equals(div.style.font, "");
}, "calc() transformation into keywords");
</script>
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