Render if the node has children.

src/OrgAst.module.css

@@ -1,9 +1,14 @@
 .OrgAst {
   flex: 1;
-  background: green;
+  background: #eeeeee;
+  padding: 5px;
+  overflow: scroll;
 }
 
 .OrgAstNode {
+  border: 1px solid #000000;
+  background: #ffffff;
+  padding: 5px;
 }
 
 .OrgAstNodeType {

src/OrgAst.tsx

@@ -25,6 +25,9 @@ const OrgAstNode = (props: {node: any}) => {
   return (
     <div className={styles.OrgAstNode}>
       <div className={styles.OrgAstNodeType}>{props.node["ast-node"]}</div>
+      {Array.isArray(props.node.children) && props.node.children.length > 0 ? (<>
+                                                                                 Has children
+                                                                               </>) : null}
     </div>
   );
 }