feat(transition): properly handle transition & transition-group in compiler

packages/compiler-dom/src/index.ts

@@ -1,4 +1,9 @@
-import { baseCompile, CompilerOptions, CodegenResult } from '@vue/compiler-core'
+import {
+  baseCompile,
+  CompilerOptions,
+  CodegenResult,
+  isBuiltInType
+} from '@vue/compiler-core'
 import { parserOptionsMinimal } from './parserOptionsMinimal'
 import { parserOptionsStandard } from './parserOptionsStandard'
 import { transformStyle } from './transforms/transformStyle'
@@ -8,6 +13,7 @@ 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'
 
 export function compile(
   template: string,
@@ -25,6 +31,13 @@ export function compile(
       on: transformOn,
       show: transformShow,
       ...(options.directiveTransforms || {})
+    },
+    isBuiltInComponent: tag => {
+      if (isBuiltInType(tag, `Transition`)) {
+        return TRANSITION
+      } else if (isBuiltInType(tag, `TransitionGroup`)) {
+        return TRANSITION_GROUP
+      }
     }
   })
 }