Restore generic types on IValueDidChange and IBoxDidChange. (#3609)

Co-authored-by: Gorbachev Egor <7gorbachevm@gmail.com>
mobxjs · Jan 12, 2023 · 7095fa4 · 7095fa4
1 parent fed3ff1
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diff --git a/.changeset/smooth-numbers-remember.md b/.changeset/smooth-numbers-remember.md
@@ -0,0 +1,5 @@
+---
+"mobx": patch
+---
+
+Restore generic types for newValue and oldValue on IValueDidChange and IBoxDidChange.
diff --git a/packages/mobx/src/types/observablevalue.ts b/packages/mobx/src/types/observablevalue.ts
@@ -37,16 +37,16 @@ export type IValueDidChange<T = any> = {
     observableKind: "value"
     object: IObservableValue<T>
     debugObjectName: string
-    newValue: unknown
-    oldValue: unknown
+    newValue: T
+    oldValue: T | undefined
 }
 export type IBoxDidChange<T = any> =
     | {
           type: "create"
           observableKind: "value"
           object: IObservableValue<T>
           debugObjectName: string
-          newValue: unknown
+          newValue: T
       }
     | IValueDidChange<T>