diff --git a/package/src/languages/css.ts b/package/src/languages/css.ts
index 19f0d80d..325ab94e 100644
--- a/package/src/languages/css.ts
+++ b/package/src/languages/css.ts
@@ -1,5 +1,5 @@
 import { languageMap } from "../core"
-import { isBracketPair } from "./patterns"
+import { isBracketPair, openBracket } from "./patterns"
 
 languageMap.css =
 	languageMap.sass =
@@ -9,7 +9,7 @@ languageMap.css =
 				block: ["/*", "*/"],
 			},
 			autoIndent: [
-				([start], value) => /[([{][^\n)\]}]*$/.test(value.slice(0, start)),
+				([start], value) => openBracket.test(value.slice(0, start)),
 				([start, end], value) => isBracketPair.test(value[start - 1] + value[end]),
 			],
 		}
diff --git a/package/src/languages/html.ts b/package/src/languages/html.ts
index 3cf64fce..ecf9be27 100644
--- a/package/src/languages/html.ts
+++ b/package/src/languages/html.ts
@@ -1,5 +1,5 @@
 import { languageMap } from "../core"
-import { isBracketPair, xmlClosingTag, xmlOpeningTag } from "./patterns"
+import { isBracketPair, openBracket, xmlClosingTag, xmlOpeningTag } from "./patterns"
 
 const voidTags = /^(?:area|base|w?br|col|embed|hr|img|input|link|meta|source|track)$/
 
@@ -14,16 +14,13 @@ languageMap.markup =
 				block: ["<!--", "-->"],
 			},
 			autoIndent: [
-				([start], value) =>
-					isOpening((value = value.slice(0, start))) ||
-					/[([{][^\n)\]}]*$/.test(value),
+				([start], value) => isOpening((value = value.slice(0, start))) || openBracket.test(value),
 				([start, end], value) =>
 					isBracketPair.test(value[start - 1] + value[end]) ||
 					(isOpening(value.slice(0, start)) && xmlClosingTag.test(value.slice(end))),
 			],
 			autoCloseTags([start, end], value) {
-				const tagName =
-					start == end && (value.slice(0, start) + ">").match(xmlOpeningTag)?.[1]
+				const tagName = start == end && (value.slice(0, start) + ">").match(xmlOpeningTag)?.[1]
 				if (tagName && !voidTags.test(tagName)) return `</${tagName}>`
 			},
 		}
diff --git a/package/src/languages/patterns.ts b/package/src/languages/patterns.ts
index 2a9fe17e..ece26598 100644
--- a/package/src/languages/patterns.ts
+++ b/package/src/languages/patterns.ts
@@ -2,6 +2,7 @@ const clikeIndent = /[([{][^\n)\]}]*$|(?:(?:^|[^.])\b(?:if\s*\(.+?\)|else|case.+
 	isBracketPair = /\[]|\(\)|{}/,
 	xmlOpeningTag =
 		/<(?![!\d])([^\s>\/=$<%]+)(?:\s(?:\s*[^\s>\/=]+(?:\s*=\s*(?:"[^"]*"|'[^']*'|[^\s'">=]+))?)+)?\s*>[ \t]*$/,
-	xmlClosingTag = /^<\/(?!\d)[^\s>\/=$<%]+\s*>/
+	xmlClosingTag = /^<\/(?!\d)[^\s>\/=$<%]+\s*>/,
+	openBracket = /[([{][^\n)\]}]*$/
 
-export { clikeIndent, isBracketPair, xmlOpeningTag, xmlClosingTag }
+export { clikeIndent, isBracketPair, xmlOpeningTag, xmlClosingTag, openBracket }
diff --git a/package/src/languages/xml.ts b/package/src/languages/xml.ts
index 54fa71c9..8941f7b5 100644
--- a/package/src/languages/xml.ts
+++ b/package/src/languages/xml.ts
@@ -1,5 +1,5 @@
 import { languageMap } from "../core"
-import { isBracketPair, xmlClosingTag, xmlOpeningTag } from "./patterns"
+import { isBracketPair, openBracket, xmlClosingTag, xmlOpeningTag } from "./patterns"
 
 // Same as HTML, but without void tags
 languageMap.xml =
@@ -14,16 +14,13 @@ languageMap.xml =
 			},
 			autoIndent: [
 				([start], value) =>
-					xmlOpeningTag.test((value = value.slice(0, start))) ||
-					/[([{][^\n)\]}]*$/.test(value),
+					xmlOpeningTag.test((value = value.slice(0, start))) || openBracket.test(value),
 				([start, end], value) =>
 					isBracketPair.test(value[start - 1] + value[end]) ||
-					(xmlOpeningTag.test(value.slice(0, start)) &&
-						xmlClosingTag.test(value.slice(end))),
+					(xmlOpeningTag.test(value.slice(0, start)) && xmlClosingTag.test(value.slice(end))),
 			],
 			autoCloseTags([start, end], value) {
-				const match =
-					start == end && (value.slice(0, start) + ">").match(xmlOpeningTag)
+				const match = start == end && (value.slice(0, start) + ">").match(xmlOpeningTag)
 				return match ? `</${match[1]}>` : ""
 			},
 		}