fix(runtime-core): ensure app instance can be garbage collected after unmount. (close #2907)

packages/reactivity/__tests__/readonly.spec.ts

@@ -1,14 +1,14 @@
 import {
-  reactive,
-  readonly,
-  toRaw,
+  effect,
+  isProxy,
   isReactive,
   isReadonly,
   markRaw,
-  effect,
+  reactive,
+  readonly,
   ref,
   shallowReadonly,
-  isProxy
+  toRaw
 } from '../src'
 
 /**
@@ -461,5 +461,13 @@ describe('reactivity/readonly', () => {
         `Set operation on key "foo" failed: target is readonly.`
       ).not.toHaveBeenWarned()
     })
+
+    test('should allow shallow und normal reactive for same target', () => {
+      const target = { foo: 1 }
+      const shallowProxy = shallowReadonly(target)
+      const normalProxy = readonly(target)
+
+      expect(normalProxy).not.toBe(shallowProxy)
+    })
   })
 })

packages/reactivity/__tests__/shallowReactive.spec.ts

@@ -1,4 +1,5 @@
-import { shallowReactive, isReactive, reactive } from '../src/reactive'
+import { isReactive, reactive, shallowReactive } from '../src/reactive'
+
 import { effect } from '../src/effect'
 
 describe('shallowReactive', () => {
@@ -13,6 +14,14 @@ describe('shallowReactive', () => {
     expect(isReactive(props.n)).toBe(true)
   })
 
+  test('should allow shallow und normal reactive for same target', () => {
+    const target = { foo: 1 }
+    const shallowProxy = shallowReactive(target)
+    const normalProxy = reactive(target)
+
+    expect(normalProxy).not.toBe(shallowProxy)
+  })
+
   describe('collections', () => {
     test('should be reactive', () => {
       const shallowSet = shallowReactive(new Set())

packages/reactivity/src/baseHandlers.ts

@@ -1,29 +1,32 @@
 import {
-  reactive,
-  readonly,
-  toRaw,
+  ITERATE_KEY,
+  pauseTracking,
+  resetTracking,
+  track,
+  trigger
+} from './effect'
+import {
   ReactiveFlags,
   Target,
+  reactive,
+  reactiveMap,
+  readonly,
   readonlyMap,
-  reactiveMap
+  shallowReactiveMap,
+  shallowReadonlyMap,
+  toRaw
 } from './reactive'
 import { TrackOpTypes, TriggerOpTypes } from './operations'
 import {
-  track,
-  trigger,
-  ITERATE_KEY,
-  pauseTracking,
-  resetTracking
-} from './effect'
-import {
-  isObject,
-  hasOwn,
-  isSymbol,
+  extend,
   hasChanged,
+  hasOwn,
   isArray,
   isIntegerKey,
-  extend
+  isObject,
+  isSymbol
 } from '@vue/shared'
+
 import { isRef } from './ref'
 
 const builtInSymbols = new Set(
@@ -77,7 +80,15 @@ function createGetter(isReadonly = false, shallow = false) {
       return isReadonly
     } else if (
       key === ReactiveFlags.RAW &&
-      receiver === (isReadonly ? readonlyMap : reactiveMap).get(target)
+      receiver ===
+        (isReadonly
+          ? shallow
+            ? shallowReadonlyMap
+            : readonlyMap
+          : shallow
+            ? shallowReactiveMap
+            : reactiveMap
+        ).get(target)
     ) {
       return target
     }

packages/reactivity/src/reactive.ts

@@ -1,16 +1,16 @@
-import { isObject, toRawType, def } from '@vue/shared'
+import { Ref, UnwrapRef } from './ref'
+import { def, isObject, toRawType } from '@vue/shared'
+import {
+  mutableCollectionHandlers,
+  readonlyCollectionHandlers,
+  shallowCollectionHandlers
+} from './collectionHandlers'
 import {
   mutableHandlers,
   readonlyHandlers,
   shallowReactiveHandlers,
   shallowReadonlyHandlers
 } from './baseHandlers'
-import {
-  mutableCollectionHandlers,
-  readonlyCollectionHandlers,
-  shallowCollectionHandlers
-} from './collectionHandlers'
-import { UnwrapRef, Ref } from './ref'
 
 export const enum ReactiveFlags {
   SKIP = '__v_skip',
@@ -27,7 +27,9 @@ export interface Target {
 }
 
 export const reactiveMap = new WeakMap<Target, any>()
+export const shallowReactiveMap = new WeakMap<Target, any>()
 export const readonlyMap = new WeakMap<Target, any>()
+export const shallowReadonlyMap = new WeakMap<Target, any>()
 
 const enum TargetType {
   INVALID = 0,
@@ -91,7 +93,8 @@ export function reactive(target: object) {
     target,
     false,
     mutableHandlers,
-    mutableCollectionHandlers
+    mutableCollectionHandlers,
+    reactiveMap
   )
 }
 
@@ -105,7 +108,8 @@ export function shallowReactive<T extends object>(target: T): T {
     target,
     false,
     shallowReactiveHandlers,
-    shallowCollectionHandlers
+    shallowCollectionHandlers,
+    shallowReactiveMap
   )
 }
 
@@ -142,7 +146,8 @@ export function readonly<T extends object>(
     target,
     true,
     readonlyHandlers,
-    readonlyCollectionHandlers
+    readonlyCollectionHandlers,
+    readonlyMap
   )
 }
 
@@ -159,15 +164,17 @@ export function shallowReadonly<T extends object>(
     target,
     true,
     shallowReadonlyHandlers,
-    readonlyCollectionHandlers
+    readonlyCollectionHandlers,
+    shallowReadonlyMap
   )
 }
 
 function createReactiveObject(
   target: Target,
   isReadonly: boolean,
   baseHandlers: ProxyHandler<any>,
-  collectionHandlers: ProxyHandler<any>
+  collectionHandlers: ProxyHandler<any>,
+  proxyMap: WeakMap<Target, any>
 ) {
   if (!isObject(target)) {
     if (__DEV__) {
@@ -184,7 +191,6 @@ function createReactiveObject(
     return target
   }
   // target already has corresponding Proxy
-  const proxyMap = isReadonly ? readonlyMap : reactiveMap
   const existingProxy = proxyMap.get(target)
   if (existingProxy) {
     return existingProxy

packages/runtime-core/src/apiCreateApp.ts

@@ -272,6 +272,7 @@ export function createAppAPI<HostElement>(
           if (__DEV__ || __FEATURE_PROD_DEVTOOLS__) {
             devtoolsUnmountApp(app)
           }
+          delete app._container.__vue_app__
         } else if (__DEV__) {
           warn(`Cannot unmount an app that is not mounted.`)
         }