alert when no barcode

Author: Keillion

1.hello-world/3.read-video-angular/src/app/img-decode/img-decode.component.ts

@@ -18,6 +18,7 @@ export class ImgDecodeComponent implements OnInit {
       for (const result of results) {
         alert(result.barcodeText);
       }
+      if(!results.length){ alert('No barcode found'); }
     } catch (ex) {
       console.error(ex);
     }

1.hello-world/4.read-video-react/src/components/ImgDecode/ImgDecode.js

@@ -15,6 +15,7 @@ export default class ImgDecode extends Component {
       for(let result of results){
         alert(result.barcodeText);
       }
+      if(!results.length){ alert('No barcode found'); }
     } catch(ex) {
       console.error(ex);
     }

1.hello-world/5.read-video-vue/src/components/ImgDecode.vue

@@ -19,6 +19,7 @@ export default {
         for(let result of results){
           alert(result.barcodeText);
         }
+        if(!results.length){ alert('No barcode found'); }
       } catch(ex) {
         console.error(ex);
       }

1.hello-world/6.read-video-vue3/src/components/ImgDecode.vue

@@ -17,6 +17,7 @@ export default {
         for(let result of results){
           alert(result.barcodeText);
         }
+        if(!results.length){ alert('No barcode found'); }
       } catch(ex) {
         console.error(ex);
       }

1.hello-world/7.read-video-nextjs/components/ImgDecode.js

@@ -14,6 +14,7 @@ export default class ImgDecode extends Component {
       for(let result of results){
         alert(result.barcodeText);     
       }
+      if(!results.length){ alert('No barcode found'); }
     } catch(ex) {
       console.error(ex);
     }

1.hello-world/8.read-video-nuxtjs/components/ImgDecode.vue

@@ -20,6 +20,7 @@ export default {
         for(let result of results){
           alert(result.barcodeText);
         }
+        if(!results.length){ alert('No barcode found'); }
       } catch(ex) {
         console.error(ex);
       }