types.d.ts

/** Minimal Web Speech API surface — not in TypeScript's DOM lib yet. */
interface SpeechRecognitionAlternative { transcript: string }
interface SpeechRecognitionResult {
  readonly length: number;
  readonly isFinal: boolean;
  [index: number]: SpeechRecognitionAlternative;
}
interface SpeechRecognitionResultList {
  readonly length: number;
  [index: number]: SpeechRecognitionResult;
}
interface SpeechRecognitionEvent extends Event {
  readonly resultIndex: number;
  readonly results: SpeechRecognitionResultList;
}
declare class SpeechRecognition extends EventTarget {
  lang: string;
  continuous: boolean;
  interimResults: boolean;
  start(): void;
  stop(): void;
  onresult: ((e: SpeechRecognitionEvent) => void) | null;
  onerror: ((e: Event) => void) | null;
  onend: (() => void) | null;
}
interface Window {
  SpeechRecognition?: typeof SpeechRecognition;
  webkitSpeechRecognition?: typeof SpeechRecognition;
}