From 165ee2d880e5ea99d396b9a4a6bd73f2d961e8d2 Mon Sep 17 00:00:00 2001
From: Andrew Towers <atowers@gmail.com>
Date: Sat, 25 Aug 2018 01:12:40 +1000
Subject: [PATCH] change kMarkupPattern to allow more custom element names per
 spec

---
 src/index.ts | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/index.ts b/src/index.ts
index bf68ac3..50d64e9 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -550,7 +550,8 @@ export class Matcher {
 	}
 }
 
-const kMarkupPattern = /<!--[^]*?(?=-->)-->|<(\/?)([a-z][a-z0-9]*-?[a-z0-9]*)\s*([^>]*?)(\/?)>/ig;
+// https://html.spec.whatwg.org/multipage/custom-elements.html#valid-custom-element-name
+const kMarkupPattern = /<!--[^]*?(?=-->)-->|<(\/?)([a-z][-.0-9_a-z]*)\s*([^>]*?)(\/?)>/ig;
 const kAttributePattern = /(^|\s)(id|class)\s*=\s*("([^"]+)"|'([^']+)'|(\S+))/ig;
 const kSelfClosingElements = {
 	meta: true,