diff --git a/README.md b/README.md
index 37ea01c4..eca21735 100644
--- a/README.md
+++ b/README.md
@@ -39,6 +39,11 @@ If you have any questions, feel free to [contact Dynamsoft support](https://www.
 
 ## Sample list
 
+### Hello-world
+
+- [hello-world.html](./hello-world.html) — The simplest example to get started with single barcode scanning.
+- [read-an-image.html](./read-an-image.html) — Demonstrates how to decode and read barcodes from uploaded image files.
+
 ### Frameworks
 
 - [angular/](./frameworks/angular/) — Angular examples.
diff --git a/hello-world.html b/hello-world.html
index e82fe98f..5e10a1d7 100644
--- a/hello-world.html
+++ b/hello-world.html
@@ -26,6 +26,20 @@ <h1 class="barcode-scanner-title">
     let config = {
       license: "DLS2eyJvcmdhbml6YXRpb25JRCI6IjIwMDAwMSJ9", // Replace with your Dynamsoft license key
       container: document.querySelector(".barcode-scanner-view"), // Specify where to render the scanner UI
+
+      /*
+        scanMode controls the scanning behavior:
+          - SM_MULTI_UNIQUE: Continuously scans and collects each unique barcode.
+          - SM_SINGLE: Stops scanning after the first barcode is detected.
+      */
+      // scanMode: Dynamsoft.EnumScanMode.SM_MULTI_UNIQUE,
+      // onUniqueBarcodeScanned: (result) => {
+      //   console.log("Scanned barcode: ", result.text);
+      //   if (condition) { // You can add custom logic here to handle each scanned barcode
+      //     barcodeScanner.dispose(); // Stop scanning
+      //   }
+      // },
+
       // showUploadImageButton: true,
       // scannerViewConfig: {
       //   showFlashButton: true,
@@ -84,4 +98,4 @@ <h1 class="barcode-scanner-title">
   </style>
 </body>
 
-</html>
\ No newline at end of file
+</html>