Add missing onExpand argument in TypeScript definitions

Resolves #248.

Author: jakezatecky

CHANGELOG.md

@@ -11,6 +11,7 @@
 ### Bug Fixes
 
 * [#208]: Add missing `onCheck` argument in TypeScript definition
+* [#248]: Add missing `onExpand` argument in TypeScript definition
 
 ## [v1.6.0](https://github.com/jakezatecky/react-checkbox-tree/compare/v1.5.0...v1.6.0) (2019-12-11)
 

src/index.d.ts

@@ -13,7 +13,11 @@ declare module "react-checkbox-tree" {
     }
 
     interface OnCheckNode extends Node {
-      checked: boolean;
+        checked: boolean;
+    }
+
+    interface OnExpandNode extends Node {
+        expanded: boolean;
     }
 
     interface Icons {
@@ -59,8 +63,8 @@ declare module "react-checkbox-tree" {
         showNodeIcon?: boolean;
         showNodeTitles?: boolean;
         onCheck?: (checked: Array<string>, node: OnCheckNode) => void;
-        onClick?: (event: { checked: boolean, value: any }) => void;
-        onExpand?: (expanded: Array<string>) => void;
+        onClick?: (node: OnCheckNode) => void;
+        onExpand?: (expanded: Array<string>, node: OnExpandNode) => void;
     }
 
     export default class CheckboxTree extends React.Component<CheckboxProps> {}