feat(core): keep-alive

packages/runtime-core/src/componentProxy.ts

@@ -73,7 +73,7 @@ export const PublicInstanceProxyHandlers: ProxyHandler<any> = {
       propsProxy,
       accessCache,
       type,
-      user
+      sink
     } = target
     // fast path for unscopables when using `with` block
     if (__RUNTIME_COMPILE__ && (key as any) === Symbol.unscopables) {
@@ -128,8 +128,8 @@ export const PublicInstanceProxyHandlers: ProxyHandler<any> = {
           return instanceWatch.bind(target)
       }
     }
-    if (hasOwn(user, key)) {
-      return user[key]
+    if (hasOwn(sink, key)) {
+      return sink[key]
     } else if (__DEV__ && currentRenderingInstance != null) {
       warn(
         `Property ${JSON.stringify(key)} was accessed during render ` +
@@ -157,7 +157,7 @@ export const PublicInstanceProxyHandlers: ProxyHandler<any> = {
         warn(`Attempting to mutate prop "${key}". Props are readonly.`, target)
       return false
     } else {
-      target.user[key] = value
+      target.sink[key] = value
     }
     return true
   }