I am looking for a working example for the onmark event (https://developer.mozilla.org/en-US/docs/Web/API/SpeechSynthesisUtterance/onmark).
I followed the MDN implementation (Chrome 72) but the onmark callback is never called.
I specified well structured SSML as text value with mark tags in place as following:
"<?xml version='1.0'?><speak version='1.1' xmlns='http://www.w3.org/2001/10/synthesis' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xsi:schemaLocation='http://www.w3.org/2001/10/synthesis http://www.w3.org/TR/speech-synthesis11/synthesis.xsd' xml:lang='en-US'> Go from <mark name='here'/> here, to <mark name='there'/> there!</speak>"
Would appreciate any examples/ideas.
Thank you, G