Baseline Widely available
The mark event of the Web Speech API SpeechSynthesisUtterance object is fired when the spoken utterance reaches a named SSML "mark" tag.
Use the event name in methods like addEventListener(), or set an event handler property.
addEventListener("mark", (event) => { })
onmark = (event) => { }
In addition to the properties listed below, properties from the parent interface, Event, are available.
charIndex Read only
Returns the index position of the character in the SpeechSynthesisUtterance.text that was being spoken when the event was triggered.
elapsedTime Read only
Returns the elapsed time in seconds after the SpeechSynthesisUtterance.text started being spoken that the event was triggered at.
name Read only
Returns the name associated with certain types of events occurring as the SpeechSynthesisUtterance.text is being spoken: the name of the SSML marker reached in the case of a mark event, or the type of boundary reached in the case of a boundary event.
utterance Read only
Returns the SpeechSynthesisUtterance instance that the event was triggered on.
You can use the mark event in an addEventListener method:
utterThis.addEventListener("mark", (event) => {
console.log(`A mark was reached: ${event.name}`);
});
Or use the onmark event handler property:
utterThis.onmark = (event) => {
console.log(`A mark was reached: ${event.name}`);
};
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