feat: More hints to nodes (#10565)

Co-authored-by: Giulio Andreini <g.andreini@gmail.com>
Co-authored-by: Shireen Missi <94372015+ShireenMissi@users.noreply.github.com>

packages/nodes-base/nodes/HttpRequest/V3/HttpRequestV3.node.ts

@@ -18,6 +18,7 @@ import type {
 import {
 	BINARY_ENCODING,
 	NodeApiError,
+	NodeExecutionOutput,
 	NodeConnectionType,
 	NodeOperationError,
 	jsonParse,
@@ -2138,6 +2139,23 @@ export class HttpRequestV3 implements INodeType {
 
 		returnItems = returnItems.map(replaceNullValues);
 
+		if (
+			returnItems.length === 1 &&
+			returnItems[0].json.data &&
+			Array.isArray(returnItems[0].json.data)
+		) {
+			return new NodeExecutionOutput(
+				[returnItems],
+				[
+					{
+						message:
+							"The result has a 'data' property which contains an array of items, you can split this array into separate items by using the 'Split Out' node",
+						location: 'outputPane',
+					},
+				],
+			);
+		}
+
 		return [returnItems];
 	}
 }