DayPilot Scheduler数据量大渲染缓慢，如何实现房间数据分块加载？

Dealing with large datasets in DayPilot Scheduler can absolutely grind rendering to a halt—chunked loading is the perfect fix here. Let’s walk through how to implement this for your room resources step by step:

1. Set Up Scheduler for Chunked Loading #

First, initialize your scheduler with virtual scrolling (to only render visible rooms) and set up a scroll handler to trigger loading more chunks as the user scrolls. We’ll start with an empty resource list and load the first chunk on initialization:

const dp = new DayPilot.Scheduler("dp", {
  height: "100vh",
  virtualScroll: true, // Critical: only renders visible resources
  timeRangeSelectedHandling: "Enabled",
  // Keep your existing config here...
  
  // Handle scroll events to load more rooms
  onScroll: async (args) => {
    // Trigger load when we're 50px from the bottom of the resource list
    const isNearBottom = args.scrollTop + args.viewportHeight >= args.scrollHeight - 50;
    if (isNearBottom) {
      await loadNextRoomChunk();
    }
  }
});

// Load first chunk on init
await loadNextRoomChunk();
dp.init();

2. Implement the Chunk Loading Logic #

Create a function to fetch paginated room data from your backend, handle loading states, and append new rooms to the scheduler. We’ll add a loading indicator to keep users informed:

let currentPage = 0;
const chunkSize = 20; // Adjust based on what feels smooth for your UI
let isLoading = false; // Prevent duplicate load triggers

async function loadNextRoomChunk() {
  if (isLoading) return;
  isLoading = true;

  // Add a temporary "Loading..." resource
  dp.resources.add({ id: "loading", name: "Loading more rooms..." });

  try {
    // Fetch paginated rooms from your API
    const response = await fetch(`/api/rooms?page=${++currentPage}&size=${chunkSize}`);
    const newRooms = await response.json();

    // Remove loading indicator
    dp.resources.remove("loading");

    // Append new rooms to the scheduler
    dp.resources.add(newRooms);

    // Stop loading if we've fetched all rooms
    if (newRooms.length < chunkSize) {
      dp.message("All rooms loaded");
    }
  } catch (err) {
    console.error("Failed to load rooms:", err);
    dp.resources.remove("loading");
    dp.message("Error loading rooms—please try again");
  } finally {
    isLoading = false;
  }
}

3. Backend Requirements #

Make sure your backend endpoint returns room data in DayPilot’s resource format—each room object needs at least an id and name field. Example response:

[
  { "id": "room1", "name": "Conference Room A" },
  { "id": "room2", "name": "Conference Room B" }
]

4. Optional: Add a "Load More" Button #

If you prefer explicit loading over scroll-triggered, replace the scroll handler with a button click event:

<button id="loadMoreBtn">Load More Rooms</button>

document.getElementById("loadMoreBtn").addEventListener("click", loadNextRoomChunk);

Visual Example #

Here’s how the chunked loading looks in action:

内容的提问来源于stack exchange，提问作者Vitaly