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75 lines
3.1 KiB
HTML
75 lines
3.1 KiB
HTML
<!doctype html>
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<meta charset="utf-8">
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<title>Test for the page-break-* legacy shorthands.</title>
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<link rel="author" title="Emilio Cobos Álvarez" href="mailto:emilio@crisal.io">
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<link rel="author" title="Mozilla" href="https://mozilla.org">
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<link rel="help" href="https://drafts.csswg.org/css-cascade-4/#legacy-shorthand">
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<link rel="help" href="https://drafts.csswg.org/css-break/#page-break-properties">
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<div></div>
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<script>
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const NEW_VALUES = ["page", "column"].filter(v => CSS.supports("break-before", v));
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const LEGACY_VALUES = ["always", "auto", "left", "right", "avoid"];
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const LEGACY_MAPPING = { "always": "page" };
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const REVERSE_LEGACY_MAPPING = { "page": "always" };
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const div = document.querySelector("div");
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const cs = getComputedStyle(div);
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test(function() {
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for (const property of ["break-before", "break-after"]) {
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for (const val of LEGACY_VALUES) {
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const mapped_value = LEGACY_MAPPING[val] || val;
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div.style["page-" + property] = val;
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assert_equals(div.style["page-" + property], val);
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assert_equals(div.style[property], mapped_value);
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assert_equals(cs.getPropertyValue("page-" + property), val);
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assert_equals(cs.getPropertyValue(property), mapped_value);
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assert_not_equals(div.style.cssText.indexOf(property + ": " + mapped_value + ";"), -1);
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assert_equals(div.style.cssText.indexOf("page-" + property), -1,
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"Legacy shorthands don't appear in cssText");
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}
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}
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}, "Legacy values of the shorthands work as expected")
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test(function() {
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for (const property of ["break-before", "break-after"]) {
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for (const val of NEW_VALUES) {
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const mapped_value = REVERSE_LEGACY_MAPPING[val] || "";
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div.style[property] = val;
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assert_equals(div.style[property], val);
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assert_equals(div.style["page-" + property], mapped_value);
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assert_equals(cs.getPropertyValue("page-" + property), mapped_value);
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assert_equals(cs.getPropertyValue(property), val);
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}
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}
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}, "New values work on the new longhands, but serialize to the empty string in the legacy shorthands");
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test(function() {
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for (const property of ["break-before", "break-after"]) {
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for (const val of NEW_VALUES) {
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div.style["page-" + property] = "";
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div.style["page-" + property] = val;
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assert_equals(div.style["page-" + property], "");
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assert_equals(div.style[property], "");
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assert_equals(cs.getPropertyValue("page-" + property), "auto");
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assert_equals(cs.getPropertyValue(property), "auto");
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}
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}
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}, "New values of the break longhands don't work on legacy shorthands");
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// See https://github.com/w3c/csswg-drafts/issues/3332
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test(function() {
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for (const property of ["break-before", "break-after"]) {
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div.style["page-" + property] = "var(--a)";
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assert_equals(div.style["page-" + property], "var(--a)");
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assert_equals(div.style[property], "");
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assert_equals(div.style.cssText.indexOf("page-" + property), -1);
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}
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}, "Legacy shorthands really never appear on cssText, even when there are variable references");
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</script>
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