AnyChart JavaScript Gantt Chart supports custom drawing of timeline elements, enabling you to render any visual shape instead of the default task bars.
This sample creates a project Gantt chart that draws three bars per task row representing optimistic, most-likely, and pessimistic schedule scenarios. Custom rendering shapes and drawer functions position each bar with distinct fill colors (green, default, red). Grouping tasks use a dashed center-line drawer. HTML tooltips display start/end dates and durations for all three scenarios side by side.
See the Gantt Chart documentation for all configuration options.