From: Evan You <yyx990803@gmail.com>
Date: Mon, 17 Feb 2020 16:02:15 +0000 (-0500)
Subject: build: make watch tree-shakable in lean build
X-Git-Tag: v3.0.0-alpha.5~16
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=0c1fe72dcf1d688fabf3b2b420dbe08da116a2ca;p=thirdparty%2Fvuejs%2Fcore.git

build: make watch tree-shakable in lean build
---

diff --git a/packages/runtime-core/src/componentProxy.ts b/packages/runtime-core/src/componentProxy.ts
index 5d8d4364a6..b2ff4baada 100644
--- a/packages/runtime-core/src/componentProxy.ts
+++ b/packages/runtime-core/src/componentProxy.ts
@@ -1,7 +1,7 @@
 import { ComponentInternalInstance, Data, Emit } from './component'
 import { nextTick, queueJob } from './scheduler'
 import { instanceWatch } from './apiWatch'
-import { EMPTY_OBJ, hasOwn, isGloballyWhitelisted } from '@vue/shared'
+import { EMPTY_OBJ, hasOwn, isGloballyWhitelisted, NOOP } from '@vue/shared'
 import {
   ExtractComputedReturns,
   ComponentOptionsBase,
@@ -63,7 +63,7 @@ const publicPropertiesMap: Record<
   $options: i => i.type,
   $forceUpdate: i => () => queueJob(i.update),
   $nextTick: () => nextTick,
-  $watch: i => instanceWatch.bind(i)
+  $watch: __FEATURE_OPTIONS__ ? i => instanceWatch.bind(i) : NOOP
 }
 
 const enum AccessTypes {