Timeline
Inspect dated events with their full source text.
Use Timeline for events located on a numeric or UTC time axis. It represents when something happened, rather than treating an event as a measured duration or inventing evenly spaced dates.
Supply up to 16 series and 2,048 events in total, each with id, x, title and optional description. UTC dates are integer epoch milliseconds. Null dates remain unknown and are not placed at zero. Events at the same coordinate keep distinct IDs and full text.
Labels can alternate, sit above or below the baseline, and have a bounded width. At most 128 label boxes are placed, with collisions omitted while markers and original text remain available. X zoom/pan, X reference lines, series visibility and point tooltips are supported. Stacking and Y zoom are incompatible. Final font measurement belongs to the renderer.