fix(reactivity): track length on for in iteration on Array

fix #2427
2020-10-19 17:37:10 -04:00
parent d9ad45ad6c
commit 0e5a3c47a7
2 changed files with 16 additions and 1 deletions
--- a/packages/reactivity/src/baseHandlers.ts
+++ b/packages/reactivity/src/baseHandlers.ts
@@ -179,7 +179,7 @@ function has(target: object, key: string | symbol): boolean {
 }

 function ownKeys(target: object): (string | number | symbol)[] {
-  track(target, TrackOpTypes.ITERATE, ITERATE_KEY)
+  track(target, TrackOpTypes.ITERATE, isArray(target) ? 'length' : ITERATE_KEY)
  return Reflect.ownKeys(target)
 }