docs(blog): update React-DND article with performance optimization te… (

#6603)

documentation/blog/2023-03-07-react-dnd.md → documentation/blog/2024-12-24-react-dnd.md

@@ -4,17 +4,19 @@ description: We'll be using the react-dnd library to create draggable components
 slug: react-draggable-components-with-react-dnd
 authors: david_omotayo
 tags: [react, Refine, tutorial]
-image: https://refine.ams3.cdn.digitaloceanspaces.com/blog/2023-03-07-react-dnd/social.png
+image: https://refine.ams3.cdn.digitaloceanspaces.com/blog/2023-03-07-react-dnd/social-2.png
 hide_table_of_contents: false
 ---
 
+**This article was last updated on December 24, 2024, to include advanced techniques for optimizing React-DND performance, such as avoiding unnecessary re-renders, virtualizing large lists, and supporting mobile devices with the Touch Backend, along with simplified explanations for better clarity.**
+
 <br/>
 
 <img src="https://refine.ams3.cdn.digitaloceanspaces.com/blog/2023-03-07-react-dnd/final-min.gif"  alt="react draggable" />
 
 <br />
 
-# Introduction
+## Introduction
 
 The HTML Drag-and-Drop API is a pioneering feature of the web, whose introduction has inspired developers to find innovative ways of using it to enhance the user experience on their websites.
 
@@ -688,15 +690,6 @@ Now, if you save your project go back to the browser, you should see the cards r
 
 <img src="https://refine.ams3.cdn.digitaloceanspaces.com/blog/2023-03-07-react-dnd/rendering-cards.png"  alt="react draggable" />
 
-<br />
-
-<br/>
-<div>
-<a href="https://discord.gg/refine">
-  <img  src="https://refine.ams3.cdn.digitaloceanspaces.com/website/static/img/discord_big_blue.png" alt="discord banner" />
-</a>
-</div>
-
 ## Using the useDrag hook
 
 To make our cards draggable, we'll declare the `useDrag` hook inside the `cards` component, give it a `type` and item `value`, and then pass the `dragRef` variable to the card component using the `ref` attribute.
@@ -901,6 +894,114 @@ If you save your progress and revisit the browser, you should now be able to dra
 
 That's all. We have successfully created a kanban board with draggable cards and columns with drop zones. You can enhance the appearance by adding designs based on the state of each card and column.
 
+## Optimizing Performance with React-DND
+
+Performance can become an issue when working with React-DND, especially with a large number of draggable items. Below are some tips to keep things running efficiently:
+
+**Avoid Unnecessary Re-Renders**
+
+Utilize `React.memo` or `useMemo` to avoid unnecessary re-renders. For instance, if your draggable items remain unchanged, memoizing them can save a lot of processing time.
+
+**Batch State Updates**
+
+When updating multiple items after a drop, batch those updates instead of triggering multiple state changes. This minimizes React’s render cycles.
+
+**Minimize the `collect` Function’s Scope**
+
+The `collect` function in `useDrag` and `useDrop` is powerful, but adding excessive logic can degrade performance. Only gather data that’s absolutely necessary.
+
+**Virtualize Large Lists**
+
+For hundreds of draggable items, consider using libraries like `react-window` or `react-virtualized`. These libraries render only the visible items, reducing React’s workload.
+
+By applying these strategies, you’ll achieve a drag-and-drop experience that is both fast and functional.
+
+## Error Handling and Debugging
+
+React-DND is a robust library, but you might encounter some common issues. Here’s how to resolve them:
+
+**Missing `DndProvider`**
+
+If you forget to wrap your app with `DndProvider`, nothing will work. Ensure your root component includes it:
+
+```jsx
+import { DndProvider } from "react-dnd";
+import { HTML5Backend } from "react-dnd-html5-backend";
+
+function App() {
+  return (
+    <DndProvider backend={HTML5Backend}>
+      <YourApp />
+    </DndProvider>
+  );
+}
+```
+
+**Type Mismatches Between useDrag and useDrop**
+
+The type property in useDrag must match the accept property in useDrop. Otherwise, the drop zone won’t recognize the dragged item:
+
+```tsx
+const [{ isDragging }, dragRef] = useDrag({ type: "item" });
+const [{ isOver }, dropRef] = useDrop({ accept: "item" });
+```
+
+**Monitor Data Not Updating**
+
+If collect isn’t providing accurate data, ensure you’re returning the correct values from the monitor:
+
+```tsx
+collect: (monitor) => ({ isDragging: monitor.isDragging() });
+```
+
+Debugging these small issues can save significant time. Always refer to the documentation and browser console for detailed error messages.
+
+**Mobile Device Support**
+
+React-DND’s default backend (HTML5Backend) works well on desktop browsers but struggles on mobile devices. Here’s how to enable drag-and-drop for touchscreens:
+
+**Use the Touch Backend**
+
+Install the react-dnd-touch-backend package designed for touch devices:
+
+```
+npm install react-dnd-touch-backend
+```
+
+**Set Up the Touch Backend**
+
+Replace HTML5Backend with TouchBackend in your app’s DndProvider:
+
+```tsx
+import { DndProvider } from "react-dnd";
+import { TouchBackend } from "react-dnd-touch-backend";
+
+function App() {
+  return (
+    <DndProvider backend={TouchBackend}>
+      <YourApp />
+    </DndProvider>
+  );
+}
+```
+
+**Customize Touch Behavior**
+
+You can tweak the touch backend’s settings for better performance, such as adjusting the drag delay:
+
+```tsx
+const backendOptions = {
+  enableMouseEvents: true,
+  delay: 100,
+};
+
+<DndProvider backend={TouchBackend} options={backendOptions}>
+  <YourApp />
+</DndProvider>;
+```
+
+With these adjustments, your drag-and-drop features will work seamlessly across both desktop and mobile devices.
+
 ## Conclusion
 
 This article introduced Refine and React-DND, detailing the process of setting up a Refine project with predefined CRUD pages via the Superplate CLI and integrating React-DND. It also covered the creation of a dashboard page featuring a kanban board that utilizes the useDrag and useDrop hooks from React-DND for its drag-and-drop functionality.