fix(compiler-core): recognize empty string as non-identifier (#12553)

KazariEX · web-flow · commit ce933390ad1c · 2025-07-18T15:58:50.000+08:00
diff --git a/packages/compiler-core/src/utils.ts b/packages/compiler-core/src/utils.ts
@@ -63,7 +63,7 @@ export function isCoreComponent(tag: string): symbol | void {
   }
 }
 
-const nonIdentifierRE = /^\d|[^\$\w\xA0-\uFFFF]/
+const nonIdentifierRE = /^$|^\d|[^\$\w\xA0-\uFFFF]/
 export const isSimpleIdentifier = (name: string): boolean =>
   !nonIdentifierRE.test(name)
 

Original file line number	Diff line number	Diff line change
`@@ -63,7 +63,7 @@ export function isCoreComponent(tag: string): symbol \| void {`
`63`	`63`	`}`
`64`	`64`	`}`
`65`	`65`
`66`		`-const nonIdentifierRE = /^\d\|[^\$\w\xA0-\uFFFF]/`
	`66`	`+const nonIdentifierRE = /^$\|^\d\|[^\$\w\xA0-\uFFFF]/`
`67`	`67`	`export const isSimpleIdentifier = (name: string): boolean =>`
`68`	`68`	`!nonIdentifierRE.test(name)`
`69`	`69`