Create a timeline visualization using timevis::timevis() and save using
htmlwidgets::saveWidget().
Arguments
- data
- A dataframe containing the timeline items. Each item on the timeline is represented by a row in the dataframe. - startand- contentare the only two required columns. See the Data format section below for more details. For a full list of all supported columns, see the Data Format section in the official visjs Timeline documentation.
- groups
- A dataframe containing the groups data (optional). See the Groups section below for more details. 
- file
- File to save HTML into 
- showZoom
- If - TRUE(default), then include "Zoom In"/"Zoom Out" buttons on the widget.