fix(compiler-core): transform empty v-bind dynamic argument content correctly (#12554)

KazariEX · web-flow · commit d3af67e87879 · 2025-07-18T15:56:01.000+08:00
diff --git a/packages/compiler-core/src/transforms/vBind.ts b/packages/compiler-core/src/transforms/vBind.ts
@@ -65,7 +65,7 @@ export const transformBind: DirectiveTransform = (dir, _node, context) => {
     arg.children.unshift(`(`)
     arg.children.push(`) || ""`)
   } else if (!arg.isStatic) {
-    arg.content = `${arg.content} || ""`
+    arg.content = arg.content ? `${arg.content} || ""` : `""`
   }
 
   // .sync is replaced by v-model:arg

Original file line number	Diff line number	Diff line change
`@@ -65,7 +65,7 @@ export const transformBind: DirectiveTransform = (dir, _node, context) => {`
`65`	`65`	arg.children.unshift(`(`)
`66`	`66`	arg.children.push(`) \|\| ""`)
`67`	`67`	`} else if (!arg.isStatic) {`
`68`		- arg.content = `${arg.content} \|\| ""`
	`68`	+ arg.content = arg.content ? `${arg.content} \|\| ""` : `""`
`69`	`69`	`}`
`70`	`70`
`71`	`71`	`// .sync is replaced by v-model:arg`