HTML export of Timeline view data is not currently implemented in Tinderbox versions 6-7.
The Tinderbox Timeline Library is a Javascript library that renders timelines in an HTML canvas element. It is primarily intended to support export from Tinderbox timelines to the Web, which often requires nothing more than pressing the EMBED… button in Timeline view and pasting the generated code into your Web page.
This section of aTbRef assumes the reader is proficient in JavaScript and is not a JavaScript tutorial.
Read here about the Timeline JavaScript library.
Online references, see: https://www.eastgate.com/Tinderbox/Tutorials/TheTinderboxTimelineLibr.html and https://www.eastgate.com/Tinderbox/Tutorials/SharingTinderboxTimeline.html