| <!doctype html> |
| <title>Serialization of declarations in group rules</title> |
| <link rel="author" title="Steinar H. Gunderson" href="mailto:sesse@chromium.org"> |
| <link rel="help" href="https://github.com/w3c/csswg-drafts/issues/7850"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| |
| <style id="test-sheet"></style> |
| <script> |
| function serialize(cssText) { |
| let [ss] = document.styleSheets; |
| while (ss.rules.length) { |
| ss.removeRule(0) |
| } |
| ss.insertRule(cssText); |
| return ss.rules[0].cssText; |
| } |
| |
| function assert_unchanged(cssText) { |
| assert_equals(serialize(cssText), cssText); |
| } |
| |
| function assert_becomes(cssText, serializedCssText) { |
| assert_equals(serialize(cssText), serializedCssText); |
| } |
| |
| // Declarations are serialized on one line, rules on two. |
| test(() => { |
| assert_unchanged("@media screen {\n div { color: red; background-color: green; }\n}"); |
| assert_unchanged("div {\n @media screen { color: red; background-color: green; }\n}"); |
| }); |
| |
| // Mixed declarations/rules are on two lines. |
| test(() => { |
| assert_unchanged("div {\n @supports selector(&) {\n color: red; background-color: green;\n &:hover { color: navy; }\n}\n}"); |
| }); |
| |
| // & {} rules are removed if and only if they are first, and they have no children. |
| test(() => { |
| assert_becomes("div { @media screen { & { color: red; } }", |
| "div {\n @media screen { color: red; }\n}"); |
| assert_becomes("div { @media screen { & { color: red; &:hover { } } }", |
| "div {\n @media screen {\n & {\n color: red;\n &:hover { }\n}\n}\n}"); |
| assert_becomes("div { @media screen { &.cls { color: red; } & { color: red; }", |
| "div {\n @media screen {\n &.cls { color: red; }\n & { color: red; }\n}\n}"); |
| assert_becomes("div { @media screen { & { color: red; } & { color: red; }", |
| "div {\n @media screen {\n color: red;\n & { color: red; }\n}\n}"); |
| assert_becomes("div { @media screen { color: red; & { color: red; }", |
| "div {\n @media screen {\n color: red;\n & { color: red; }\n}\n}"); |
| assert_becomes("div { @media screen { color: red; & { color: blue; }", |
| "div {\n @media screen {\n color: red;\n & { color: blue; }\n}\n}"); |
| assert_becomes("div { @media screen { &, p > & { color: blue; }", |
| "div {\n @media screen {\n &, p > & { color: blue; }\n}\n}"); |
| }); |
| |
| // They are not removed from regular rules. |
| test(() => { |
| assert_becomes("div { & { color: red; } }", "div {\n & { color: red; }\n}"); |
| }); |
| |
| // Empty rules (confusingly?) serialize different between style rules |
| // and conditional group rules. |
| test(() => { |
| assert_unchanged("@media screen {\n}"); |
| assert_unchanged("div { }"); |
| assert_unchanged("div {\n @media screen {\n}\n}"); |
| assert_unchanged("@media screen {\n div { }\n}"); |
| }); |
| </script> |
