SpeechRecognitionErrorEvent: error property

Limited availability

This feature is not Baseline because it does not work in some of the most widely-used browsers.

The error read-only property of the SpeechRecognitionErrorEvent interface returns the type of error raised.

Value

A string naming the type of error. The possible error types are:

no-speech

No speech was detected.

aborted

Speech input was aborted in some manner, perhaps by some user-agent-specific behavior like a button the user can press to cancel speech input.

audio-capture

Audio capture failed.

network

Network communication required for completing the recognition failed.

not-allowed

The user agent disallowed any speech input from occurring for reasons of security, privacy or user preference.

service-not-allowed

The user agent disallowed the requested speech recognition service, either because the user agent doesn't support it or because of reasons of security, privacy or user preference. In this case it would allow another more suitable speech recognition service to be used instead.

bad-grammar

There was an error in the speech recognition grammar or semantic tags, or the chosen grammar format or semantic tag format was unsupported.

language-not-supported

The user agent does not support the language specified in the value of lang attribute of the SpeechRecognition object. The set of supported languages is browser-dependent, and from frontend code there is no way to programmatically determine what languages a user's browser supports for speech recognition.

Examples

js
const recognition = new SpeechRecognition();
recognition.onerror = (event) => {
  console.log(`Speech recognition error detected: ${event.error}`);
  console.log(`Additional information: ${event.message}`);
};

Specifications

Specification
Web Speech API
# dom-speechrecognitionerrorevent-error

Browser compatibility

See also