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schedule

The functionality is available in PRO Edition only PRO

Description​

Enables automatic task scheduling based on end-to-start dependencies

The schedule property activates automatic scheduling in Gantt. It controls whether task dependencies trigger cascading scheduling changes. When enabled, the system automatically adjusts dependent tasks according to end-to-start links, ensuring that successor tasks always start after their predecessors.

This is a forward-only scheduling mode: changes propagate from a task to its successors.

Usage​

schedule?: {
  auto?: boolean;
};

Parameters​

  • true - enables automatic scheduling
  • false - disables automatic scheduling

When automatic scheduling is enabled:

  • End-to-start dependencies are enforced at all times
  • On initial load, all successor tasks are shifted forward to start after their predecessors
  • When a task start, end, or duration changes, all successors are automatically recalculated and moved if needed
  • Backward movement respects constraints — tasks cannot be moved earlier than allowed by their predecessor’s end
  • The schedule-task event fires whenever cascading updates occur
  • End-to-start links support the lag property (fixed or flexible delays)
  • Invalid links (circular or summary → children) are automatically removed on load and during editing
  • If projectStart is defined, all tasks are shifted forward so that the earliest task starts exactly at the project start date, and all others preserve the same relative offset.

Example​

<script>
  import { Gantt } from "@svar/svelte-gantt";
  import { getData } from "../data";

  const data = getData("basic");
</script>

<Gantt
  tasks={data.tasks}
  links={data.links}
  schedule={{ auto: true }}
/>

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