Load Resources on Demand

The resources can be populated on initialization or in case of a bigger hierarchy, the more efficient way is to load the child resources and their events on demand.

Getting the resources and the events in real time as the user navigates improves load performance.

Use the resource-expand lifecycle event to load the data runtime. You can learn about lifecycle events and places where to drop logic to customize the experience.

Get started with this example

Demo

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Build hierarchical resource scheduling interfaces with on-demand data loading — the Timeline fetches child resources.

Code

View code on GitHub 
<script setup>
import {
  getJson,
  MbscEventcalendar,
  MbscToast,
  setOptions 
} from '@mobiscroll/vue'
import { ref } from 'vue'

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

const toastMessage = ref('')
const isToastOpen = ref(false)

const myEvents = ref([
  {
    start: '2026-10-25T10:00',
    end: '2026-10-25T13:00',
    title: 'Event 14',
    resource: 6
  },
  {
    start: '2026-10-25T15:00',
    end: '2026-10-25T17:30',
    title: 'Event 15',
    resource: 7
  },
  {
    start: '2026-10-25T09:00',
    end: '2026-10-25T11:00',
    title: 'Event 16',
    resource: 8
  },
  {
    start: '2026-10-25T17:00',
    end: '2026-10-25T20:00',
    title: 'Event 17',
    resource: 9
  }
])

const myResources = ref([
  {
    id: 1,
    name: 'Group 1',
    collapsed: true,
    eventCreation: false,
    children: [
      {
        id: 11,
        color: '#e20000',
        name: 'Resource 1'
      },
      {
        id: 12,
        color: '#76e083',
        name: 'Resource 2'
      },
      {
        id: 13,
        color: '#4981d6',
        name: 'Resource 3'
      }
    ]
  },
  {
    id: 2,
    name: 'Group 2',
    collapsed: true,
    eventCreation: false,
    children: [
      {
        id: 21,
        name: 'Loading...'
      }
    ]
  },
  {
    id: 3,
    name: 'Group 3',
    collapsed: true,
    eventCreation: false,
    children: [
      {
        id: 31,
        name: 'Loading...'
      }
    ]
  },
  {
    id: 4,
    name: 'Group 4',
    collapsed: true,
    eventCreation: false,
    children: [
      {
        id: 41,
        name: 'Loading...'
      }
    ]
  },
  {
    id: 5,
    name: 'Group 5',
    collapsed: true,
    eventCreation: false,
    children: [
      {
        id: 51,
        color: '#af0000',
        name: 'Resource 12'
      },
      {
        id: 52,
        color: '#446f1c',
        name: 'Resource 13'
      },
      {
        id: 53,
        color: '#1dab2f',
        name: 'Resource 14'
      }
    ]
  },
  {
    id: 6,
    name: 'Resource 17',
    color: '#167593'
  },
  {
    id: 7,
    name: 'Resource 18',
    color: '#93166c'
  },
  {
    id: 8,
    name: 'Resource 19',
    color: '#e5e923'
  },
  {
    id: 9,
    name: 'Resource 20',
    color: '#935028'
  }
])

const myView = {
  timeline: {
    type: 'day'
  }
}

function loadChildResources(args) {
  const resource = args.resourceObj

  if (!resource.loaded) {
    getJson(
      'https://trial.mobiscroll.com/load-resources/?res=' + args.resource,
      (data) => {
        const newEvents = [...myEvents.value, ...data.events]

        resource.children = data.resources
        resource.loaded = true

        myEvents.value = newEvents
        myResources.value = [...myResources.value]

        toastMessage.value = 'Resources loaded'
        isToastOpen.value = true
      },
      'jsonp'
    )
  }
}

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

<template>
  <MbscEventcalendar :clickToCreate="" :dragToCreate="" :dragToMove="" :dragToResize="" :eventDelete=""
    className="md-load-resources-on-demand"
    :view="myView"
    :data="myEvents"
    :resources="myResources"
    @resource-expand="loadChildResources"
  />
  <MbscToast :message="toastMessage" :isOpen="isToastOpen" @close="handleToastClose" />
</template>

<style>
.md-load-resources-on-demand .mbsc-timeline-parent {
  height: 34px;
}
</style>

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