Thenomatch event of theWeb Speech API is fired when the speech recognition service returns a final result with no significant recognition.

This may involve some degree of recognition, which doesn't meet or exceed theconfidence threshold.

Syntax

Use the event name in methods likeaddEventListener(), or set an event handler property.

addEventListener("nomatch", (event) => { })onnomatch = (event) => { }

Event type

ASpeechRecognitionEvent. Inherits fromEvent.

Event properties

In addition to the properties listed below, properties from the parent interface,Event, are available.

SpeechRecognitionEvent.emmaRead only

Returns an Extensible MultiModal Annotation markup language (EMMA) — XML — representation of the result.

SpeechRecognitionEvent.interpretationRead only

Returns the semantic meaning of what the user said.

SpeechRecognitionEvent.resultIndexRead only

Returns the lowest index value result in theSpeechRecognitionResultList "array" that has actually changed.

SpeechRecognitionEvent.resultsRead only

Returns aSpeechRecognitionResultList object representing all the speech recognition results for the current session.

Examples

You can use thenomatch event in anaddEventListener method:

const recognition = new (SpeechRecognition || webkitSpeechRecognition)();recognition.addEventListener("nomatch", () => {  console.error("Speech not recognized");});

Or use theonnomatch event handler property:

recognition.onnomatch = () => {  console.error("Speech not recognized");};

Specifications

Browser compatibility

See also

• Web Speech API