fix(vapor): handle vapor mode with empty script (#12910)

Author: edison1105

packages-private/sfc-playground/package.json

@@ -13,7 +13,7 @@
     "vite": "catalog:"
   },
   "dependencies": {
-    "@vue/repl": "^4.5.0",
+    "@vue/repl": "^4.5.1",
     "file-saver": "^2.0.5",
     "jszip": "^3.10.1",
     "vue": "workspace:*"

packages/compiler-sfc/__tests__/parse.spec.ts

@@ -381,6 +381,17 @@ h1 { color: red }
     })
   })
 
+  describe('vapor mode', () => {
+    test('on empty script', () => {
+      const { descriptor } = parse(`<script vapor></script>`)
+      expect(descriptor.vapor).toBe(true)
+    })
+    test('on template', () => {
+      const { descriptor } = parse(`<template vapor><div/></template>`)
+      expect(descriptor.vapor).toBe(true)
+    })
+  })
+
   describe('warnings', () => {
     function assertWarning(errors: Error[], msg: string) {
       expect(errors.some(e => e.message.match(msg))).toBe(true)

packages/compiler-sfc/src/parse.ts

@@ -162,8 +162,9 @@ export function parse(
       ignoreEmpty &&
       node.tag !== 'template' &&
       isEmpty(node) &&
-      !hasSrc(node)
+      !hasAttr(node, 'src')
     ) {
+      descriptor.vapor ||= hasAttr(node, 'vapor')
       return
     }
     switch (node.tag) {
@@ -409,13 +410,8 @@ function padContent(
   }
 }
 
-function hasSrc(node: ElementNode) {
-  return node.props.some(p => {
-    if (p.type !== NodeTypes.ATTRIBUTE) {
-      return false
-    }
-    return p.name === 'src'
-  })
+function hasAttr(node: ElementNode, name: string) {
+  return node.props.some(p => p.type === NodeTypes.ATTRIBUTE && p.name === name)
 }
 
 /**