From 4d6ccc52cc27322f0369f4951380da4f359efd1a Mon Sep 17 00:00:00 2001
From: Ann Balina <ann.balina@gmail.com>
Date: Thu, 19 Nov 2020 22:21:38 +0200
Subject: [PATCH 1/3] Add onExpand callback

---
 packages/react-json-tree/src/JSONNestedNode.tsx | 10 ++++++++++
 packages/react-json-tree/src/index.tsx          |  1 +
 2 files changed, 11 insertions(+)

diff --git a/packages/react-json-tree/src/JSONNestedNode.tsx b/packages/react-json-tree/src/JSONNestedNode.tsx
index e8dbb261..48b91b27 100644
--- a/packages/react-json-tree/src/JSONNestedNode.tsx
+++ b/packages/react-json-tree/src/JSONNestedNode.tsx
@@ -95,6 +95,7 @@ interface Props extends CircularPropsPassedThroughJSONNestedNode {
   nodeTypeIndicator: string;
   createItemString: (data: any, collectionLimit: number) => string;
   expandable: boolean;
+  onExpand?: (data: any, level: number, keyPath: any[]) => void;
 }
 
 interface State {
@@ -131,6 +132,7 @@ export default class JSONNestedNode extends React.Component<Props, State> {
     sortObjectKeys: PropTypes.oneOfType([PropTypes.func, PropTypes.bool]),
     isCircular: PropTypes.bool,
     expandable: PropTypes.bool,
+    onExpand: PropTypes.func
   };
 
   static defaultProps = {
@@ -234,6 +236,14 @@ export default class JSONNestedNode extends React.Component<Props, State> {
 
   handleClick = () => {
     if (this.props.expandable) {
+      if (this.props.onExpand && !this.state.expanded) {
+        const {
+          data,
+          level,
+          keyPath
+        } = this.props;
+        this.props.onExpand(data, level, keyPath);
+      }
       this.setState({ expanded: !this.state.expanded });
     }
   };
diff --git a/packages/react-json-tree/src/index.tsx b/packages/react-json-tree/src/index.tsx
index 50a5524b..c3db91a7 100644
--- a/packages/react-json-tree/src/index.tsx
+++ b/packages/react-json-tree/src/index.tsx
@@ -20,6 +20,7 @@ interface Props extends CircularPropsPassedThroughJSONTree {
   data: any;
   theme?: Theme;
   invertTheme: boolean;
+  onExpand?: (data: any, level: number, keyPath: any[]) => void;
 }
 
 interface State {

From 867a497d91ae2e67dd3e13011fe41bbe9279a884 Mon Sep 17 00:00:00 2001
From: Ann Balina <ann.balina@gmail.com>
Date: Fri, 20 Nov 2020 01:51:16 +0200
Subject: [PATCH 2/3] Update package info

---
 packages/react-json-tree/README.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/packages/react-json-tree/README.md b/packages/react-json-tree/README.md
index 28adfac8..75451bd9 100644
--- a/packages/react-json-tree/README.md
+++ b/packages/react-json-tree/README.md
@@ -146,6 +146,7 @@ Their full signatures are:
 - `isCustomNode: function(value)` - overrides the default object type detection and renders the value as a single value
 - `collectionLimit: number` - sets the number of nodes that will be rendered in a collection before rendering them in collapsed ranges
 - `keyPath: (string | number)[]` - overrides the initial key path for the root node (defaults to `[root]`)
+- `onExpand: function(data, level, keyPath)` - on expand callback
 
 ### Credits
 

From 045c1579cceccafa09020fd4a19378edd7950c4c Mon Sep 17 00:00:00 2001
From: Ann Balina <ann.balina@gmail.com>
Date: Sat, 21 Nov 2020 00:56:15 +0200
Subject: [PATCH 3/3] Add onExpand to types

---
 packages/react-json-tree/src/types.ts | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/packages/react-json-tree/src/types.ts b/packages/react-json-tree/src/types.ts
index 79cc7d88..14bef869 100644
--- a/packages/react-json-tree/src/types.ts
+++ b/packages/react-json-tree/src/types.ts
@@ -9,6 +9,7 @@ interface SharedCircularPropsPassedThroughJSONTree {
     expanded: boolean,
     expandable: boolean
   ) => React.ReactNode;
+  onExpand?: (data: any, level: number, keyPath: any[]) => void;
 }
 interface SharedCircularPropsProvidedByJSONTree
   extends SharedCircularPropsPassedThroughJSONTree {
@@ -41,6 +42,7 @@ interface JSONNestedNodeCircularPropsPassedThroughJSONTree {
   isCustomNode: (value: any) => boolean;
   collectionLimit: number;
   sortObjectKeys?: ((a: any, b: any) => number) | boolean;
+  onExpand?: (data: any, level: number, keyPath: any[]) => void;
 }
 export type CircularPropsPassedThroughJSONTree = SharedCircularPropsPassedThroughJSONTree &
   JSONValueNodeCircularPropsPassedThroughJSONTree &