Javascript Timeline Resource Drag-and-Drop Reorder Example

Resources can be reordered directly through the UI by enabling resourceReorder: true under the timeline settings of the view option. When enabled, a drag handle icon will appear next to each resource, allowing users to drag and reorder resources.

When a resource is dropped into a new position, the onResourceOrderUpdate lifecycle event is triggered. To prevent the resource order from being updated, return false in the handler function of this event.

Use the immutableData option to ensure the original data remains unchanged when validating resource positions after a drop.

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Reorder resources on a Timeline by drag and drop — each row shows a drag handle, and an update callback runs on drop.

mobiscroll.setOptions({
  locale:  ,
  theme: ' ',
  themeVariant: ' '
});

var resources = [
  { id: 1, name: 'Resource 1' },
  { id: 2, name: 'Resource 2 (Reorder disabled)', reorder: false },
  { id: 3, name: 'Resource 3' },
  { id: 4, name: 'Resource 4 (Reorder disabled)', reorder: false },
  {
    id: 5,
    name: 'Group 1',
    children: [
      { id: 6, name: 'Resource 5' },
      { id: 7, name: 'Resource 6' },
      { id: 8, name: 'Resource 7' },
    ],
  },
  { id: 9, name: 'Resource 8' },
  { id: 10, name: 'Resource 9' },
  {
    id: 11,
    name: 'Group 2',
    children: [
      { id: 12, name: 'Resource 10' },
      { id: 13, name: 'Resource 11' },
      { id: 14, name: 'Resource 12' },
    ],
  },
  { id: 15, name: 'Resource 13' },
  { id: 16, name: 'Resource 14' },
  {
    id: 17,
    name: 'Group 3',
    children: [
      { id: 18, name: 'Resource 15' },
      { id: 19, name: 'Resource 16' },
      { id: 20, name: 'Resource 17' },
    ],
  },
  { id: 21, name: 'Resource 18' },
  {
    id: 22,
    name: 'Group 4',
    children: [
      { id: 23, name: 'Resource 19' },
      { id: 24, name: 'Resource 20' },
      { id: 25, name: 'Resource 21' },
    ],
  },
  { id: 26, name: 'Resource 22' },
];
var events = [
  { id: 1, title: 'Event 1', start: '2026-10-01T00:00', end: '2026-10-05T00:00', resource: 14, color: 'green' },
  { id: 2, title: 'Event 2', start: '2026-10-03T00:00', end: '2026-10-07T00:00', resource: 2, color: 'blue' },
  { id: 3, title: 'Event 3', start: '2026-10-05T00:00', end: '2026-10-10T00:00', resource: 10, color: 'red' },
  { id: 4, title: 'Event 4', start: '2026-10-07T00:00', end: '2026-10-11T00:00', resource: 9, color: 'yellow' },
  { id: 5, title: 'Event 5', start: '2026-10-09T00:00', end: '2026-10-12T00:00', resource: 6, color: 'purple' },
];
var tempResources = [];
var calInst = mobiscroll.eventcalendar('#demo-resource-drag-drop-reorder', {
  cssClass: 'mds-resource-drag-drop-reorder',
  view: {
    timeline: {
      type: 'month',
      resolutionHorizontal: 'day',
      resourceReorder: false,
    },
  },
  immutableData: true,
  data: events,
  resources: resources,
  onEventCreate: function (args, inst) {
    events.push(args.event);
    inst.setEvents(events.slice());
  },
  onEventDelete: function (args, inst) {
    events = events.filter(function (item) {
      return item.id !== args.event.id;
    });
    inst.setEvents(events);
  },
  onEventUpdate: function (args, inst) {
    var newEvent = args.event;
    var eventIndex = events.findIndex(function (e) {
      return e.id === newEvent.id;
    });
    var newEventList = events.slice();
    newEventList.splice(eventIndex, 1, newEvent);
    events = newEventList.slice();
    inst.setEvents(newEventList);
  },
  onResourceOrderUpdate: function (args) {
    tempResources = args.resources;
  },
  renderHeader: function () {
    return (
      '<div mbsc-calendar-nav></div>' +
      '<div class="mds-reorder-header-filter mbsc-flex mbsc-flex-1-1">' +
      '<button mbsc-button data-variant="flat" class="mds-reorder-switch mds-enable">Reorder resources</button>' +
      '<button mbsc-button class="mds-reorder-save mds-update">Save</button>' +
      '<button mbsc-button class="mds-reorder-cancel mds-update">Cancel</button>' +
      '<div class="mds-reorder-header-filter-separator"></div>' +
      '<button mbsc-calendar-prev class="mds-header-filter-prev"></button>' +
      '<button mbsc-calendar-today class="mds-header-filter-today"></button>' +
      '<button mbsc-calendar-next class="mds-header-filter-next"></button>'
    );
  },
});

function updateHeaderBtns(enableOrder) {
  var enableElm = document.querySelector('.mds-enable');
  var updateElm = document.querySelectorAll('.mds-update');
  if (enableOrder) {
    enableElm.style.display = 'none';
    updateElm.forEach(function (el) {
      el.style.display = '';
    });
  } else {
    enableElm.style.display = '';
    updateElm.forEach(function (el) {
      el.style.display = 'none';
    });
  }
}

document.querySelector('.mds-reorder-switch').addEventListener(
  'click',
  function () {
    updateHeaderBtns(true);
    calInst.setOptions({
      view: {
        timeline: {
          type: 'month',
          resourceReorder: true,
        },
      },
    });
  },
  true,
);

document.querySelector('.mds-reorder-cancel').addEventListener(
  'click',
  function () {
    updateHeaderBtns(false);
    calInst.setOptions({
      resources: resources.slice(),
      view: {
        timeline: {
          type: 'month',
          resourceReorder: false,
        },
      },
    });

    mobiscroll.toast({
      message: 'Resource order canceled',
    });
  },
  true,
);

document.querySelector('.mds-reorder-save').addEventListener('click', function () {
  if (tempResources.length) {
    resources = tempResources;
  }
  updateHeaderBtns(false);
  calInst.setOptions({
    resources: resources.slice(),
    view: {
      timeline: {
        type: 'month',
        resourceReorder: false,
      },
    },
  });

  mobiscroll.toast({
    message: 'Resource order saved',
  });
});

updateHeaderBtns(false);

<div id="demo-resource-drag-drop-reorder"></div>

.mds-resource-drag-drop-reorder .mbsc-timeline-resource-col {
  width: 240px;
}

.mds-reorder-header-filter {
  justify-content: end;
  align-items: center;
}

.mds-reorder-header-filter-separator {
  height: 25px;
  margin: 0 8px 0 12px;
  border: 1px solid var(--mbsc-eventcalendar-border-color);
}

.mbsc-material .mds-reorder-switch {
  margin-right: 10px;
}

.mds-reorder-cancel.mbsc-button {
  margin-right: 12px;
}

Resource Drag-and-Drop Reorder

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