# Moving Child Tasks (JavaScript Gantt Chart) | DayPilot Pro for JavaScript Demo

> The Gantt chart can [move task groups](https://doc.daypilot.org/gantt/group-moving/) along the time axis, including the child tasks. This option is enabled by default. You can disable it by setting [moveGroupChildren](https://api.daypilot.org/daypilot-gantt-movegroupchildren/) to false.

## Links

- Canonical HTML: /demo/gantt/taskmovingchildren.html
- Source HTML folder: /demo/gantt/
- Catalog root: /demo/
- Catalog: /demo/llms.txt

## Source

### Inline demo script 1

```javascript
var dp = new DayPilot.Gantt("dp");

        dp.startDate = DayPilot.Date.today().addDays(-1);
        dp.days = 60;

        // generate and load sample tasks
        var start = DayPilot.Date.today();
        var last = null;
        for (var i = 0; i < 5; i++) {
            var duration = Math.floor(Math.random() * 3) + 1; // 1 to 3
            var end = start.addDays(duration);

            var e = new DayPilot.Task({
                start: start,
                end: end,
                id: DayPilot.guid(),
                text: "Task " + i,
                tags: {
                    info: "info text"
                },
                children: [
                    {
                        start: start,
                        end: end,
                        id: DayPilot.guid(),
                        text: "Subtask 1",
                        complete: Math.floor(Math.random() * 101) // 0 to 100
                    },
                    {
                        start: start,
                        end: end,
                        id: DayPilot.guid(),
                        text: "Subtask 2",
                        complete: Math.floor(Math.random() * 101) // 0 to 100
                    },
                    {
                        start: end,
                        id: DayPilot.guid(),
                        text: "Milestone 1",
                        type: "Milestone"
                    }

                ]
            });

            dp.tasks.add(e);

            if (last) {
                dp.links.add(new DayPilot.Link({
                    id: DayPilot.guid(),  // optional
                    from: last,
                    to: e.id(),
                    type: "FinishToStart"
                }));
            }
            last = e.id();
            start = end;

        }

        dp.columns = [
            {
                title: "Name",
                width: 50,
                property: "text"
            },
            {
                title: "Info",
                width: 50,
                property: "info"
            },
            {
                title: "Duration",
                width: 50
            }
        ];

        dp.onBeforeRowHeaderRender = function (args) {
            var duration = args.task.duration();
            var html = duration.toString("d") + "d " + duration.toString("h") + "h";
            args.row.columns[2].html = html;
        };

        dp.onBeforeTaskRender = function (args) {
            // args.data.box.html = args.data.text;
        };

        dp.onRowMoving = function (args) {
            //args.position = "forbidden";
        };

        dp.onColumnResized = function (args) {
            console.log(args);
            console.log(dp.columns);
        };

        dp.contextMenuLink = new DayPilot.Menu({
            items: [
                {
                    text: "Show link ID", onClick: function (args) {
                        DayPilot.Modal.alert("Link ID: " + args.source.data.id);
                    }
                },
                {
                    text: "Delete link", onClick: function (args) {
                        dp.links.remove(args.source);
                    }
                }
            ]
        });

        dp.contextMenuTask = new DayPilot.Menu({
            items: [
                {
                    text: "Show task ID", onClick: function (args) {
                        DayPilot.Modal.alert("Task ID: " + args.source.id());
                    }
                },
                {
                    text: "Delete task", onClick: function (args) {
                        dp.tasks.remove(args.source);
                    }
                }
            ]
        });

        dp.contextMenuRow = new DayPilot.Menu({
            items: [
                {
                    text: "Show task ID", onClick: function (args) {
                        DayPilot.Modal.alert("Task ID: " + args.source.id());
                    }
                },
                {
                    text: "Delete task", onClick: function (args) {
                        dp.tasks.remove(args.source);
                    }
                }
            ]
        });

        dp.init();
```