timeline-plus (npm): Based on vis.js Timeline (v4.21.0) - [https://github.com/almende/vis.git](https://github.com/almende/vis.git).  The vis.js library was initially developed by [Almende B.V](http://almende.com).
Keywords: chart|charting-library|chronology|data-graph|data-visualization|datavisualization|graphs|javascript|timeline|timelinejs|visualization