Vue Timeline Resource Drag & Drop Reorder

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 @resource-order-update 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.

Get started with this example

Demo

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

Code

View code on GitHub 
<script setup>
import {
  MbscButton,
  MbscCalendarNav,
  MbscCalendarNext,
  MbscCalendarPrev,
  MbscCalendarToday,
  MbscEventcalendar,
  MbscToast,
  setOptions 
} from '@mobiscroll/vue'
import { ref } from 'vue'

setOptions({
  locale:  ,
  theme: ' ',
  themeVariant: ' '
})

const toastMessage = ref('')
const isToastOpen = ref(false)
const myEvents = ref([
  {
    id: 1,
    title: 'Event 1',
    start: '2026-11-01T00:00',
    end: '2026-11-05T00:00',
    resource: 14,
    color: 'green'
  },
  {
    id: 2,
    title: 'Event 2',
    start: '2026-11-03T00:00',
    end: '2026-11-07T00:00',
    resource: 2,
    color: 'blue'
  },
  {
    id: 3,
    title: 'Event 3',
    start: '2026-11-05T00:00',
    end: '2026-11-10T00:00',
    resource: 10,
    color: 'red'
  },
  {
    id: 4,
    title: 'Event 4',
    start: '2026-11-07T00:00',
    end: '2026-11-11T00:00',
    resource: 9,
    color: 'yellow'
  },
  {
    id: 5,
    title: 'Event 5',
    start: '2026-11-09T00:00',
    end: '2026-11-12T00:00',
    resource: 6,
    color: 'purple'
  },
])

const isReorder = ref(false)
const myResources = ref([
  { 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' }
])
const tempResources = ref([...myResources.value])

const myView = ref({
  timeline: {
    type: 'month',
    resourceReorder: false
  }
})

const enableReorder = () => {
  isReorder.value = true
  myView.value = {
    timeline: {
      type: 'month',
      resourceReorder: true
    }
  }
}

function saveReorder() {
  isReorder.value = false
  myView.value = {
    timeline: {
      type: 'month',
      resourceReorder: false
    }
  }
  myResources.value = tempResources.value
}

function cancelReorder() {
  isReorder.value = false
  myResources.value = [...myResources.value]
  myView.value = {
    timeline: {
      type: 'month',
      resourceReorder: false
    }
  }
  showToast('Resource order canceled')
}

function handleResourceOrder(args) {
  tempResources.value = args.resources
}

function handleEventCreate(args) {
  myEvents.value = [...myEvents.value, args.event]
}

function handleEventDelete(args) {
  myEvents.value = myEvents.value.filter((item) => item.id !== args.event.id)
}

function handleEventUpdate(args) {
  const newEvent = args.event
  const eventIndex = myEvents.value.findIndex((e) => e.id === newEvent.id)
  const newEventList = [...myEvents.value]
  newEventList.splice(eventIndex, 1, newEvent)
  myEvents.value = newEventList
}

function showToast(message) {
  toastMessage.value = message
  isToastOpen.value = true
}

function handleToastClose() {
  isToastOpen.value = false
}
</script>

<template>
  <MbscEventcalendar
    :drag-to-create="true"
    :drag-to-move="true"
    :drag-to-resize="true"
    :view="myView"
    :data="myEvents"
    :immutable-data="true"
    :resources="myResources"
    @event-create="handleEventCreate"
    @event-delete="handleEventDelete"
    @event-update="handleEventUpdate"
    @resource-order-update="handleResourceOrder"
  >
    <template #header>
      <MbscCalendarNav></MbscCalendarNav>
      <div className="mds-reorder-header-filter mbsc-flex mbsc-flex-1-1">
        <MbscButton
          @click="enableReorder()"
          variant="flat"
          className="mds-reorder-switch mds-enable"
          v-if="!isReorder"
        >
          Reorder resources
        </MbscButton>
        <MbscButton @click="saveReorder()" className="mds-reorder-save mds-update" v-if="isReorder">
          Save
        </MbscButton>
        <MbscButton
          @click="cancelReorder()"
          className="mds-reorder-save mds-update"
          v-if="isReorder"
        >
          Cancel
        </MbscButton>
        <div class="mds-reorder-header-filter-separator"></div>
      </div>
      <MbscCalendarPrev />
      <MbscCalendarToday />
      <MbscCalendarNext />
    </template>
  </MbscEventcalendar>
  <MbscToast :isOpen="isToastOpen" :message="toastMessage" @close="handleToastClose" />
</template>

<style>
.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;
}
</style>

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