chromium/src/third_party/blink/renderer/modules/speech/speech_synthesis_event_init.idl

// Copyright 2018 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// https://w3c.github.io/speech-api/#dictdef-speechsynthesiseventinit
dictionary SpeechSynthesisEventInit : EventInit {
    required SpeechSynthesisUtterance utterance;
    unsigned long charIndex = 0;
    unsigned long charLength = 0;
    float elapsedTime = 0;
    DOMString name = "";
};