The tool to be challenging to implement depending on the user’s familiarity with working with scripting. There is no documentation that properly explains how to use the tool and the lack of instructions makes it clear that the developer has made a lot of assumptions about the advanced technical knowledge of the user. Users might find it helpful to consult this demo tool that someone else has developed (http://codepen.io/anon/pen/yavQvb). Users can use this demo to make manual edits and then download a zip file with all the necessary components that the user can then upload to my their hosting in order to setup a working example of this tool.
In summary, this tool would be helpful for someone who wants to create a simple and static timeline. Personally, I prefer a more complex timeline tool like Knight Lab’s timeline.js tool which I have used in the past to illustrate the history of Geographic Information Systems, aka GIS (https://www.gislounge.com/gis-timeline/). The advantage of timesheet.js over timeline.js is that because the user uploads all the components to his or her own web hosting, there is no risk of the tool breaking because the source host removes or updates the tool. I have had my GIS timeline tool break in the past because Knight Lab updated the tool, deprecating previous versions.