Uploaded February 2026 | Updated September 2026, 2 weeks ago
In Part 8 of our React POS App series, we’ll load Category data into jQuery DataTables using server-side processing from a Node.js + Express + MySQL backend. You’ll learn how to build a clean API endpoint that returns DataTables-compatible JSON (draw, recordsTotal, recordsFiltered, data) so your table can handle pagination, sorting, and live search efficiently—even with large datasets.
We start by creating a dedicated category route file in the backend and importing the required modules: Express Router, mysql2/promise for async database queries, express-validator for sanitizing DataTables query params, and jsonwebtoken (JWT) for protected access. Then we build a reusable authenticateToken middleware that validates Bearer tokens and blocks unauthorized requests with proper HTTP status codes.
Next, we implement the GET /api/categories endpoint with validations for DataTables parameters (draw, start, length, search, order). After parsing these values, we run three key MySQL operations: total record count, filtered record count (with safe parameterized LIKE search), and the final data query with ORDER BY + LIMIT for fast results.
Finally, we mount the router in index.js, restart the server, and confirm that categories load correctly in DataTables with search and action buttons (like Edit).
✅ Next episode: Add new Category in the React POS system.
For Source Code - webslesson.info/2026/01/react-pos-system-nodejs-mysql.html
#ReactPOS #ReactNode #FullStackReact #NodeJS #ReactTutorial
In Part 8 of our React POS App series, we’ll load Category data into jQuery DataTables using server-side processing from a Node.js + Express + MySQL backend. You’ll learn how to build a clean API endpoint that returns DataTables-compatible JSON (draw, recordsTotal, recordsFiltered, data) so your table can handle pagination, sorting, and live search efficiently—even with large datasets.
We start by creating a dedicated category route file in the backend and importing the required modules: Express Router, mysql2/promise for async database queries, express-validator for sanitizing DataTables query params, and jsonwebtoken (JWT) for protected access. Then we build a reusable authenticateToken middleware that validates Bearer tokens and blocks unauthorized requests with proper HTTP status codes.
Next, we implement the GET /api/categories endpoint with validations for DataTables parameters (draw, start, length, search, order). After parsing these values, we run three key MySQL operations: total record count, filtered record count (with safe parameterized LIKE search), and the final data query with ORDER BY + LIMIT for fast results.
Finally, we mount the router in index.js, restart the server, and confirm that categories load correctly in DataTables with search and action buttons (like Edit).
✅ Next episode: Add new Category in the React POS system.
For Source Code - webslesson.info/2026/01/react-pos-system-nodejs-mysql.html
#ReactPOS #ReactNode #FullStackReact #NodeJS #ReactTutorial
