feat(runtime-core): support dynamic / external array in v-memo (#4255)

2021-08-09 15:39:22 -04:00
parent 2641422aa7
commit 6779bff537
2 changed files with 47 additions and 1 deletions
--- a/packages/runtime-core/src/helpers/withMemo.ts
+++ b/packages/runtime-core/src/helpers/withMemo.ts
@@ -11,12 +11,17 @@ export function withMemo(
    return cached
  }
  const ret = render()
-  ret.memo = memo
+
+  // shallow clone
+  ret.memo = memo.slice()
  return (cache[index] = ret)
 }

 export function isMemoSame(cached: VNode, memo: any[]) {
  const prev: any[] = cached.memo!
+  if (prev.length != memo.length) {
+    return false
+  }
  for (let i = 0; i < prev.length; i++) {
    if (prev[i] !== memo[i]) {
      return false