Fixed resultIndex undefined issue while using cognitive service ponyfill

CHANGELOG.md

@@ -5,6 +5,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
+## [Unreleased]
+
+### Fixed
+
+- Fixed resultIndex undefined issue while using cognitive service ponyfill, in PR [241](https://github.com/compulim/web-speech-cognitive-services/pull/241) by [@RushikeshGavali](https://github.com/RushikeshGavali)
+
 ## [8.1.1] - 2025-01-21
 
 ### Changed

packages/web-speech-cognitive-services/__tests__/customSpeech.js

@@ -82,7 +82,7 @@ describe.each(testTableForAuthentication)(
         [
           'result',
           {
-            resultIndex: undefined,
+            resultIndex: 0,
             results: [
               {
                 0: {

packages/web-speech-cognitive-services/src/SpeechServices/SpeechToText/createSpeechRecognitionPonyfillFromRecognizer.ts

@@ -51,6 +51,8 @@ import textNormalizationSchema from './validation/textNormalizationSchema';
 //   "Duration": 0
 // }
 
+const FINAL_RESULT_OFFSET = 1;
+
 const { ResultReason, SpeechRecognizer } = SpeechSDK;
 
 type CreateSpeechRecognitionPonyfillFromRecognizerInit = {
@@ -471,7 +473,8 @@ export default function createSpeechRecognitionPonyfillFromRecognizer({
               if (!this.continuous || stopping === 'stop') {
                 // Empty result will turn into "no-speech" later in the code.
                 finalEvent = new SpeechRecognitionEvent('result', {
-                  results: new SpeechRecognitionResultList(finalizedResults)
+                  results: new SpeechRecognitionResultList(finalizedResults),
+                  resultIndex: finalizedResults.length - FINAL_RESULT_OFFSET
                 });
 
                 // Quirks: 2024-11-19 with Speech SDK 1.14.0
@@ -521,7 +524,8 @@ export default function createSpeechRecognitionPonyfillFromRecognizer({
                   this.continuous &&
                     this.dispatchEvent(
                       new SpeechRecognitionEvent('result', {
-                        results: new SpeechRecognitionResultList(finalizedResults)
+                        results: new SpeechRecognitionResultList(finalizedResults),
+                        resultIndex: finalizedResults.length - FINAL_RESULT_OFFSET
                       })
                     );
                 }
@@ -531,7 +535,8 @@ export default function createSpeechRecognitionPonyfillFromRecognizer({
                   finalEvent = undefined;
                 } else {
                   finalEvent = new SpeechRecognitionEvent('result', {
-                    results: new SpeechRecognitionResultList(finalizedResults)
+                    results: new SpeechRecognitionResultList(finalizedResults),
+                    resultIndex: finalizedResults.length - FINAL_RESULT_OFFSET
                   });
                 }
 
@@ -548,16 +553,18 @@ export default function createSpeechRecognitionPonyfillFromRecognizer({
                   finalEvent = undefined;
                 }
               } else if (recognizing) {
+                const results = new SpeechRecognitionResultList([
+                  ...finalizedResults,
+                  cognitiveServiceEventResultToWebSpeechRecognitionResult(recognizing.result, {
+                    maxAlternatives: this.maxAlternatives,
+                    textNormalization
+                  })
+                ]);
                 this.interimResults &&
                   this.dispatchEvent(
                     new SpeechRecognitionEvent('result', {
-                      results: new SpeechRecognitionResultList([
-                        ...finalizedResults,
-                        cognitiveServiceEventResultToWebSpeechRecognitionResult(recognizing.result, {
-                          maxAlternatives: this.maxAlternatives,
-                          textNormalization
-                        })
-                      ])
+                      results,
+                      resultIndex: results.length - FINAL_RESULT_OFFSET
                     })
                   );
               }