types: improve type for WatchHandler (#160)

2019-10-08 22:48:24 +08:00
parent ff0f3bdf7c
commit 016231d09f
2 changed files with 9 additions and 13 deletions
--- a/packages/runtime-core/src/apiOptions.ts
+++ b/packages/runtime-core/src/apiOptions.ts
@@ -116,11 +116,11 @@ export type ExtractComputedReturns<T extends any> = {
    : ReturnType<T[key]>
 }

-type WatchHandler = (
-  val: any,
-  oldVal: any,
+export type WatchHandler<T = any> = (
+  val: T,
+  oldVal: T,
  onCleanup: CleanupRegistrator
-) => void
+) => any

 type ComponentWatchOptions = Record<
  string,