wip(ssr): proper scope analysis for ssr vnode slot fallback

packages/compiler-dom/src/index.ts

@@ -3,7 +3,6 @@ import {
   baseParse,
   CompilerOptions,
   CodegenResult,
-  isBuiltInType,
   ParserOptions,
   RootNode,
   noopDirectiveTransform,
@@ -18,21 +17,12 @@ import { transformVText } from './transforms/vText'
 import { transformModel } from './transforms/vModel'
 import { transformOn } from './transforms/vOn'
 import { transformShow } from './transforms/vShow'
-import { TRANSITION, TRANSITION_GROUP } from './runtimeHelpers'
 import { warnTransitionChildren } from './transforms/warnTransitionChildren'
 
 export const parserOptions = __BROWSER__
   ? parserOptionsMinimal
   : parserOptionsStandard
 
-export const isBuiltInDOMComponent = (tag: string): symbol | undefined => {
-  if (isBuiltInType(tag, `Transition`)) {
-    return TRANSITION
-  } else if (isBuiltInType(tag, `TransitionGroup`)) {
-    return TRANSITION_GROUP
-  }
-}
-
 export function getDOMTransformPreset(
   prefixIdentifiers?: boolean
 ): TransformPreset {
@@ -71,8 +61,7 @@ export function compile(
     directiveTransforms: {
       ...directiveTransforms,
       ...(options.directiveTransforms || {})
-    },
-    isBuiltInComponent: isBuiltInDOMComponent
+    }
   })
 }
 

packages/compiler-dom/src/parserOptionsMinimal.ts

@@ -3,9 +3,11 @@ import {
   ParserOptions,
   ElementNode,
   Namespaces,
-  NodeTypes
+  NodeTypes,
+  isBuiltInType
 } from '@vue/compiler-core'
 import { makeMap, isVoidTag, isHTMLTag, isSVGTag } from '@vue/shared'
+import { TRANSITION, TRANSITION_GROUP } from './runtimeHelpers'
 
 const isRawTextContainer = /*#__PURE__*/ makeMap(
   'style,iframe,script,noscript',
@@ -23,6 +25,14 @@ export const parserOptionsMinimal: ParserOptions = {
   isNativeTag: tag => isHTMLTag(tag) || isSVGTag(tag),
   isPreTag: tag => tag === 'pre',
 
+  isBuiltInComponent: (tag: string): symbol | undefined => {
+    if (isBuiltInType(tag, `Transition`)) {
+      return TRANSITION
+    } else if (isBuiltInType(tag, `TransitionGroup`)) {
+      return TRANSITION_GROUP
+    }
+  },
+
   // https://html.spec.whatwg.org/multipage/parsing.html#tree-construction-dispatcher
   getNamespace(tag: string, parent: ElementNode | undefined): DOMNamespaces {
     let ns = parent ? parent.ns : DOMNamespaces.HTML