Smaller improvements

CHANGELOG.md

@@ -20,7 +20,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Fixed
 
 - Ensure classes containing `--` are extracted correctly ([#16972](https://github.com/tailwindlabs/tailwindcss/pull/16972))
-- Ensure classes containing number followed by dash or underscore are extracted correctly ([#16980](https://github.com/tailwindlabs/tailwindcss/pull/16980))
+- Ensure classes containing numbers followed by dash or underscore are extracted correctly ([#16980](https://github.com/tailwindlabs/tailwindcss/pull/16980))
 
 ## [4.0.10] - 2025-03-05
 

crates/oxide/src/extractor/mod.rs

@@ -300,9 +300,6 @@ mod tests {
             ("items--center", vec!["items--center"]),
             // Simple utility with numbers
             ("px-2.5", vec!["px-2.5"]),
-            // Simple utility with number followed by dash or underscore
-            ("text-title1-strong", vec!["text-title1-strong"]),
-            ("text-title1_strong", vec!["text-title1_strong"]),
             // Arbitrary properties
             ("[color:red]", vec!["[color:red]"]),
             ("![color:red]", vec!["![color:red]"]),
@@ -836,6 +833,15 @@ mod tests {
         );
     }
 
+    // https://github.com/tailwindlabs/tailwindcss/issues/16978
+    #[test]
+    fn test_classes_containing_number_followed_by_dash_or_underscore() {
+        assert_extract_sorted_candidates(
+            r#"<div class="text-Title1_Strong"></div>"#,
+            vec!["text-Title1_Strong"],
+        );
+    }
+
     #[test]
     fn test_extract_css_variables() {
         for (input, expected) in [

crates/oxide/src/extractor/named_utility_machine.rs

@@ -243,7 +243,8 @@ impl Machine for NamedUtilityMachine {
                         }
 
                         // A number must be preceded by a `-`, `.` or another alphanumeric
-                        // character, and can be followed by a `.` or an alphanumeric character or dash or underscore.
+                        // character, and can be followed by a `.` or an alphanumeric character or
+                        // dash or underscore.
                         //
                         // E.g.: `text-2xs`
                         //            ^^

crates/oxide/src/extractor/utility_machine.rs

@@ -220,9 +220,6 @@ mod tests {
             // With dashes
             ("items-center", vec!["items-center"]),
             ("items--center", vec!["items--center"]),
-            // With number followed by dash or underscore
-            ("text-title1-strong", vec!["text-title1-strong"]),
-            ("text-title1_strong", vec!["text-title1_strong"]),
             // Inside a string
             ("'flex'", vec!["flex"]),
             // Multiple utilities