✨ Make special variables like $node, $parameter, ... accessible

in Function Nodes

packages/nodes-base/nodes/Function.node.ts

@@ -48,8 +48,14 @@ export class Function implements INodeType {
 			getNodeParameter: this.getNodeParameter,
 			helpers: this.helpers,
 			items,
+			// To be able to access data of other items
+			$item: (index: number) => this.getWorkflowDataProxy(index),
 		};
 
+		// Make it possible to access data via $node, $parameter, ...
+		// By default use data from first item
+		Object.assign(sandbox, sandbox.$item(0));
+
 		const vm = new NodeVM({
 			console: 'inherit',
 			sandbox,