Task resizing allows the users to change the start or duration of an existing task using drag and drop.

Task resizing is enabled by default.

  • Resizing is disabled for task groups in Auto mode, and for milestones.
  • You can disable resizing for all tasks using taskResizeHandling = "Disabled"
  • You can disable resizing for selected tasks using resizeDisabled property when loading the task data or during task customization.



gantt.onTaskResized = function(args) {
  gantt.message("Task resized.");