SpeechRecognition: nomatch event

{{APIRef("Web Speech API")}}

The nomatch event of the Web 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 the {{domxref("SpeechRecognitionAlternative.confidence","confidence")}} threshold.

Syntax

Use the event name in methods like {{domxref("EventTarget.addEventListener", "addEventListener()")}}, or set an event handler property.

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

onnomatch = (event) => { }

Event type

A {{domxref("SpeechRecognitionEvent")}}. Inherits from {{domxref("Event")}}.

{{InheritanceDiagram("SpeechRecognitionEvent")}}

Event properties

In addition to the properties listed below, properties from the parent interface, {{domxref("Event")}}, are available.

• {{domxref("SpeechRecognitionEvent.emma")}} {{ReadOnlyInline}}
  • : Returns an Extensible MultiModal Annotation markup language (EMMA) — XML — representation of the result.
• {{domxref("SpeechRecognitionEvent.interpretation")}} {{ReadOnlyInline}}
  • : Returns the semantic meaning of what the user said.
• {{domxref("SpeechRecognitionEvent.resultIndex")}} {{ReadOnlyInline}}
  • : Returns the lowest index value result in the {{domxref("SpeechRecognitionResultList")}} "array" that has actually changed.
• {{domxref("SpeechRecognitionEvent.results")}} {{ReadOnlyInline}}
  • : Returns a {{domxref("SpeechRecognitionResultList")}} object representing all the speech recognition results for the current session.

Examples

You can use the nomatch event in an addEventListener method:

const recognition = new (SpeechRecognition || webkitSpeechRecognition)();

recognition.addEventListener("nomatch", () => {
  console.error("Speech not recognized");
});

Or use the onnomatch event handler property:

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

Specifications

{{Specifications}}

Browser compatibility

{{Compat}}

See also

• Web Speech API