v0.32.6

src/transform/css.rs

@@ -52,7 +52,9 @@ pub fn minify(body: &[u8]) -> Result<Vec<u8>> {
             last_char = Some(' ');
         }
         pending_space = false;
-        if matches!(ch, '{' | '}' | ':' | ';' | ',' | '>') && last_char == Some(' ') {
+        // A space before ':' may be a descendant combinator before a pseudo-class.
+        // E.g. `.card :is(.child)` must not become `.card:is(.child)`.
+        if matches!(ch, '{' | '}' | ';' | ',' | '>') && last_char == Some(' ') {
             out.pop();
         }
         out.push(ch);
@@ -71,5 +73,6 @@ fn needs_space(previous: Option<char>, next: Option<char>) -> bool {
         return false;
     };
     !matches!(previous, '{' | '}' | ':' | ';' | ',' | '>')
-        && !matches!(next, '{' | '}' | ':' | ';' | ',' | '>')
+        // A ':' can introduce a pseudo-class after a descendant combinator.
+        && !matches!(next, '{' | '}' | ';' | ',' | '>')
 }

src/transform/tests.rs

@@ -405,4 +405,29 @@ mod tests {
         let received = response.into_body().collect().await.unwrap().to_bytes();
         assert_eq!(&received[..], encoded.as_slice());
     }
+    #[test]
+    fn css_minifier_preserves_descendant_pseudoclasses() {
+        let source = r#"html:is([data-corner-style="square"], [data-corner-style="rounded"]) :is(.stat, .card) { border-radius: var(--rp-radius-surface) !important; }
+            .menu :hover { color: red; }
+            .menu :not(.hidden) { display: block; }
+            .menu:hover { color: blue; }
+            body { color: red; }"#;
+        let result = css::minify(source.as_bytes()).expect("minify CSS");
+        let output = std::str::from_utf8(&result).expect("UTF-8 CSS");
+        assert!(output.contains("html:is([data-corner-style=\"square\"],[data-corner-style=\"rounded\"]) :is(.stat,.card)"), "{output}");
+        assert!(output.contains(".menu :hover{"), "{output}");
+        assert!(output.contains(".menu :not(.hidden){"), "{output}");
+        assert!(output.contains(".menu:hover{"), "{output}");
+        assert!(output.contains("body{color:red;}"), "{output}");
+    }
+
+    #[test]
+    fn css_minifier_preserves_dashboard_corner_selector() {
+        let input = include_str!("../admin/web/style.css");
+        let result = css::minify(input.as_bytes()).expect("minify panel stylesheet");
+        let output = std::str::from_utf8(&result).expect("UTF-8 CSS");
+        assert!(output.contains("html:is([data-corner-style=\"square\"],[data-corner-style=\"subtle\"],[data-corner-style=\"rounded\"],[data-corner-style=\"extra\"]) :is("), "lost descendant pseudo-class combinator");
+        assert!(output.contains(".card,.stat,dialog,.login-card,"), "lost card selector list");
+        assert!(output.contains("border-radius:var(--rp-radius-surface)!important"), "lost radius declaration");
+    }
 }