Calculate shouldExpandNode on JSONNestedNode.render

Author: gnestor

src/JSONNestedNode.js

@@ -114,7 +114,12 @@ export default class JSONNestedNode extends React.Component {
       labelRenderer,
       expandable
     } = this.props;
-    const expanded = this.state.expanded;
+    let expanded = this.state.expanded;
+    if (this.state.expanded === false) {
+      expanded = this.props.shouldExpandNode && !this.props.isCircular ?
+      this.props.shouldExpandNode(this.props.keyPath, this.props.data, this.props.level) :
+      false;
+    }
     const renderedChildren = expanded || (hideRoot && this.props.level === 0) ?
       renderChildNodes({ ...this.props, level: this.props.level + 1 }) : null;