Lazy Load Events on Scroll

The scheduler view is virtualized which means that the markup is being generated and maintained on the fly. Navigating both vertically and horizontally through scrolling fires the @virtual-loading lifecycle event which can be used to load the data on scroll rather than load everything on initial page rendering.

This dramatically improves performance in case of a large event count since not all data is loaded in memory from start.

Get started with this example

Demo

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Load scheduler events on demand as users scroll — fetch only the visible date range to keep performance fast with large event counts.

Code

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

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

const myEvents = ref([])
const isToastOpen = ref(false)
const myResources = [
  { id: 1, name: 'Resource 1', color: '#FF5733' },
  { id: 2, name: 'Resource 2', color: '#33FF57' },
  { id: 3, name: 'Resource 3', color: '#3357FF' },
  { id: 4, name: 'Resource 4', color: '#FF33A6' },
  { id: 5, name: 'Resource 5', color: '#FFC300' },
  { id: 6, name: 'Resource 6', color: '#DAF7A6' },
  { id: 7, name: 'Resource 7', color: '#581845' },
  { id: 8, name: 'Resource 8', color: '#900C3F' },
  { id: 9, name: 'Resource 9', color: '#C70039' },
  { id: 10, name: 'Resource 10', color: '#FF5733' },
  { id: 11, name: 'Resource 11', color: '#33FFBD' },
  { id: 12, name: 'Resource 12', color: '#FFC300' },
  { id: 13, name: 'Resource 13', color: '#FF33F6' },
  { id: 14, name: 'Resource 14', color: '#33FF57' },
  { id: 15, name: 'Resource 15', color: '#33A6FF' },
  { id: 16, name: 'Resource 16', color: '#DAF7A6' },
  { id: 17, name: 'Resource 17', color: '#581845' },
  { id: 18, name: 'Resource 18', color: '#900C3F' },
  { id: 19, name: 'Resource 19', color: '#C70039' },
  { id: 20, name: 'Resource 20', color: '#FF33F6' }
]

const myView = {
  scheduler: {
    type: 'month',
    timeCellStep: 15,
    timeLabelStep: 15
  }
}

const handleVirtualLoading = (args) => {
  const start = formatDate('YYYY-MM-DDTHH:mm:ss', args.viewStart)
  const end = formatDate('YYYY-MM-DDTHH:mm:ss', args.viewEnd)

  getJson(
    'https://trial.mobiscroll.com/load-data-scroll/?start=' +
      start +
      '&end=' +
      end +
      '&rstart=' +
      args.resourceStart +
      '&rend=' +
      args.resourceEnd,
    (data) => {
      myEvents.value = data.events
      isToastOpen.value = true
    },
    'jsonp'
  )
}
</script>

<template>
  <MbscEventcalendar :clickToCreate="" :dragToCreate="" :dragToMove="" :dragToResize="" :eventDelete=""
    :view="myView"
    :data="myEvents"
    :resources="myResources"
    groupBy="date"
    :onVirtualLoading="handleVirtualLoading"
  />
  <MbscToast
    message="Loading events..."
    :duration="1000"
    :isOpen="isToastOpen"
    @close="isToastOpen = false"
  ></MbscToast>
</template>

<style>
/* code */
</style>

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