Baseline Widely available
The SpeechSynthesisEvent() constructor creates a new SpeechSynthesisEvent object.
Note: A web developer doesn't typically need to call this constructor, as the browser creates these objects itself when firing events.
Syntaxnew SpeechSynthesisEvent(type, options)
type
A string with the name of the event. It is case-sensitive and browsers set it to start, end, error, pause, resume, mark, or boundary.
options
An object that, in addition to the properties defined in Event(), has the following properties:
utterance
A SpeechSynthesisUtterance object, which is the speech request the event was triggered on.
charIndex Optional
The index position of the character in SpeechSynthesisUtterance.text that was being spoken when the event was triggered. Its default value is 0.
charLength Optional
The number of characters left to be spoken after the character at the charIndex position. Its default value is 0.
elapsedTime Optional
The elapsed time in seconds, after the SpeechSynthesisUtterance.text started being spoken, at which the event was triggered. Its default value is 0.
name Optional
The name associated with certain types of events: 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. It defaults to the empty string ("").
A new SpeechSynthesisEvent object.
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