From 19ea77aff7a1f48075b002e882dffcabfe0919d0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E8=8A=B1=E6=9E=9C=E5=B1=B1=E5=A4=A7=E5=9C=A3?=
 <316783812@qq.com>
Date: Fri, 11 Nov 2022 09:15:37 +0800
Subject: [PATCH] refactor: more concise bitwise operations for flag removal
 (#7092)

---
 packages/runtime-core/src/components/KeepAlive.ts | 11 +++--------
 packages/runtime-core/src/vnode.ts                | 10 +++-------
 2 files changed, 6 insertions(+), 15 deletions(-)

diff --git a/packages/runtime-core/src/components/KeepAlive.ts b/packages/runtime-core/src/components/KeepAlive.ts
index 3fec48140fc..66d0f82a10e 100644
--- a/packages/runtime-core/src/components/KeepAlive.ts
+++ b/packages/runtime-core/src/components/KeepAlive.ts
@@ -424,14 +424,9 @@ function injectToKeepAliveRoot(
 }
 
 function resetShapeFlag(vnode: VNode) {
-  let shapeFlag = vnode.shapeFlag
-  if (shapeFlag & ShapeFlags.COMPONENT_SHOULD_KEEP_ALIVE) {
-    shapeFlag -= ShapeFlags.COMPONENT_SHOULD_KEEP_ALIVE
-  }
-  if (shapeFlag & ShapeFlags.COMPONENT_KEPT_ALIVE) {
-    shapeFlag -= ShapeFlags.COMPONENT_KEPT_ALIVE
-  }
-  vnode.shapeFlag = shapeFlag
+  // bitwise operations to remove keep alive flags
+  vnode.shapeFlag &= ~ShapeFlags.COMPONENT_SHOULD_KEEP_ALIVE
+  vnode.shapeFlag &= ~ShapeFlags.COMPONENT_KEPT_ALIVE
 }
 
 function getInnerChild(vnode: VNode) {
diff --git a/packages/runtime-core/src/vnode.ts b/packages/runtime-core/src/vnode.ts
index 41f848e44de..7d873f5a125 100644
--- a/packages/runtime-core/src/vnode.ts
+++ b/packages/runtime-core/src/vnode.ts
@@ -358,13 +358,9 @@ export function isSameVNodeType(n1: VNode, n2: VNode): boolean {
     hmrDirtyComponents.has(n2.type as ConcreteComponent)
   ) {
     // #7042, ensure the vnode being unmounted during HMR
-    if (n1.shapeFlag & ShapeFlags.COMPONENT_SHOULD_KEEP_ALIVE) {
-      n1.shapeFlag -= ShapeFlags.COMPONENT_SHOULD_KEEP_ALIVE
-    }
-    // #7042, ensure the vnode being mounted as fresh during HMR
-    if (n2.shapeFlag & ShapeFlags.COMPONENT_KEPT_ALIVE) {
-      n2.shapeFlag -= ShapeFlags.COMPONENT_KEPT_ALIVE
-    }
+    // bitwise operations to remove keep alive flags
+    n1.shapeFlag &= ~ShapeFlags.COMPONENT_SHOULD_KEEP_ALIVE
+    n2.shapeFlag &= ~ShapeFlags.COMPONENT_KEPT_ALIVE
     // HMR only: if the component has been hot-updated, force a reload.
     return false
   }