refactor: remove isTracking() method

packages/reactivity/src/effect.ts

@@ -45,7 +45,7 @@ export type DebuggerEventExtraInfo = {
   oldTarget?: Map<any, any> | Set<any>
 }
 
-let activeEffect: ReactiveEffect | undefined
+export let activeEffect: ReactiveEffect | undefined
 
 export const ITERATE_KEY = Symbol(__DEV__ ? 'iterate' : '')
 export const MAP_KEY_ITERATE_KEY = Symbol(__DEV__ ? 'Map key iterate' : '')
@@ -181,7 +181,7 @@ export function stop(runner: ReactiveEffectRunner) {
   runner.effect.stop()
 }
 
-let shouldTrack = true
+export let shouldTrack = true
 const trackStack: boolean[] = []
 
 export function pauseTracking() {
@@ -200,9 +200,7 @@ export function resetTracking() {
 }
 
 export function track(target: object, type: TrackOpTypes, key: unknown) {
-  if (!isTracking()) {
-    return
-  }
+  if (shouldTrack && activeEffect) {
     let depsMap = targetMap.get(target)
     if (!depsMap) {
       targetMap.set(target, (depsMap = new Map()))
@@ -217,10 +215,7 @@ export function track(target: object, type: TrackOpTypes, key: unknown) {
       : undefined
 
     trackEffects(dep, eventInfo)
-}
-
-export function isTracking() {
-  return shouldTrack && !!activeEffect
+  }
 }
 
 export function trackEffects(

packages/reactivity/src/ref.ts

@@ -1,4 +1,9 @@
-import { isTracking, trackEffects, triggerEffects } from './effect'
+import {
+  activeEffect,
+  shouldTrack,
+  trackEffects,
+  triggerEffects
+} from './effect'
 import { TrackOpTypes, TriggerOpTypes } from './operations'
 import { isArray, hasChanged, IfAny } from '@vue/shared'
 import { isProxy, toRaw, isReactive, toReactive } from './reactive'
@@ -24,19 +29,16 @@ type RefBase<T> = {
 }
 
 export function trackRefValue(ref: RefBase<any>) {
-  if (isTracking()) {
+  if (shouldTrack && activeEffect) {
     ref = toRaw(ref)
-    if (!ref.dep) {
-      ref.dep = createDep()
-    }
     if (__DEV__) {
-      trackEffects(ref.dep, {
+      trackEffects(ref.dep || (ref.dep = createDep()), {
         target: ref,
         type: TrackOpTypes.GET,
         key: 'value'
       })
     } else {
-      trackEffects(ref.dep)
+      trackEffects(ref.dep || (ref.dep = createDep()))
     }
   }
 }