<bmx-timeline>
A timeline.
Drag an item to move it (to another row too), drag its ends once selected to resize, double-click empty space to add one, Delete to remove. Ctrl and the wheel zoom; drag the background or the navigator's window to move through time.
History, across three thousand years
Points and ranges from 1200 BC; zoom from millennia down to single years, and the axis follows.
Fifty thousand events, clustered
A day of service events in five rows. Where a row is too crowded to stack, items gather into clusters; click one to zoom in.
Every property, event and method: https://docs.binarymission.co.uk/webcomponents/bmx/bmx-timeline.html