Handle errors from example node and clarified options about credentials and properties

nodes/ExampleNode/ExampleNode.node.ts

@@ -28,6 +28,10 @@ export class ExampleNode implements INodeType {
 		],
 	};
 
+	// The function below is responsible for actually doing whatever this node
+	// is supposed to do. In this case, we're just appending the `myString` property
+	// with whatever the user has entered.
+	// You can make async calls and use `await`.
 	async execute(this: IExecuteFunctions): Promise<INodeExecutionData[][]> {
 		const items = this.getInputData();
 
@@ -38,10 +42,24 @@ export class ExampleNode implements INodeType {
 		// value the parameter "myString" resolves to.
 		// (This could be a different value for each item in case it contains an expression)
 		for (let itemIndex = 0; itemIndex < items.length; itemIndex++) {
-			myString = this.getNodeParameter('myString', itemIndex, '') as string;
-			item = items[itemIndex];
+			try {
+				myString = this.getNodeParameter('myString', itemIndex, '') as string;
+				item = items[itemIndex];
+
+				item.json['myString'] = myString;
+			} catch (error) {
+
+				// This node should never fail but we want to showcase how
+				// to handle errors.
+				if (this.continueOnFail()) {
+					items.push({json: this.getInputData(itemIndex)[0].json, error});
+				} else {
+					// Adding `itemIndex` allows other workflows to handle this error
+					if (error.context) error.context.itemIndex = itemIndex;
+					throw error;
+				}
+			}
 
-			item.json['myString'] = myString;
 		}
 
 		return this.prepareOutputData(items);