From 43816a25c37d90dc0f4c2eb899ea025fd3055a56 Mon Sep 17 00:00:00 2001
From: Maruthan G <maruthang4@gmail.com>
Date: Sat, 11 Apr 2026 14:18:33 +0530
Subject: [PATCH] fix: resolve #174 - fix regex for hyphenated tag names in
 HTML scanner

---
 src/parser/htmlScanner.ts |  2 +-
 src/test/scanner.test.ts  | 45 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 46 insertions(+), 1 deletion(-)

diff --git a/src/parser/htmlScanner.ts b/src/parser/htmlScanner.ts
index 01750bd..941c570 100644
--- a/src/parser/htmlScanner.ts
+++ b/src/parser/htmlScanner.ts
@@ -172,7 +172,7 @@ export function createScanner(input: string, initialOffset = 0, initialState: Sc
 	let lastTypeValue: string | undefined;
 
 	function nextElementName(): string {
-		return stream.advanceIfRegExp(/^[_:\w][_:\w-.\d]*/).toLowerCase();
+		return stream.advanceIfRegExp(/^[_:\w][_:\w.\d-]*/).toLowerCase();
 	}
 
 	function nextAttributeName(): string {
diff --git a/src/test/scanner.test.ts b/src/test/scanner.test.ts
index 93b2558..0928a12 100644
--- a/src/test/scanner.test.ts
+++ b/src/test/scanner.test.ts
@@ -831,4 +831,49 @@ suite('HTML Scanner', () => {
 		}]);
 	});
 
+	test('Tag with Hyphenated Name (Vue custom element)', () => {
+		assertTokens([{
+			input: '<s-c-feature>content</s-c-feature>',
+			tokens: [
+				{ offset: 0, type: TokenType.StartTagOpen },
+				{ offset: 1, type: TokenType.StartTag, content: 's-c-feature' },
+				{ offset: 12, type: TokenType.StartTagClose },
+				{ offset: 13, type: TokenType.Content },
+				{ offset: 20, type: TokenType.EndTagOpen },
+				{ offset: 22, type: TokenType.EndTag, content: 's-c-feature' },
+				{ offset: 33, type: TokenType.EndTagClose }
+			]
+		}
+		]);
+	});
+
+	test('Self-closing Tag with Hyphenated Name', () => {
+		assertTokens([{
+			input: '<my-component />',
+			tokens: [
+				{ offset: 0, type: TokenType.StartTagOpen },
+				{ offset: 1, type: TokenType.StartTag, content: 'my-component' },
+				{ offset: 13, type: TokenType.Whitespace },
+				{ offset: 14, type: TokenType.StartTagSelfClose }
+			]
+		}
+		]);
+	});
+
+	test('Tag with Hyphenated Name and Attributes', () => {
+		assertTokens([{
+			input: '<el-button type="primary">',
+			tokens: [
+				{ offset: 0, type: TokenType.StartTagOpen },
+				{ offset: 1, type: TokenType.StartTag, content: 'el-button' },
+				{ offset: 10, type: TokenType.Whitespace },
+				{ offset: 11, type: TokenType.AttributeName },
+				{ offset: 15, type: TokenType.DelimiterAssign },
+				{ offset: 16, type: TokenType.AttributeValue },
+				{ offset: 25, type: TokenType.StartTagClose }
+			]
+		}
+		]);
+	});
+
 });
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