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