code for backend pagination

code for backend pagination Pagination is a technique for breaking up large sets of data into smaller, more manageable chunks. Here is an example of how pagination could be implemented on the backend using Node.js and MongoDB: // Import the required modules const express = require('express'); const mongoose = require('mongoose'); // Connect to the MongoDB database mongoose.connect('mongodb://localhost/mydb'); // Create the express app const app = express(); // Define the model for the data const Data = mongoose.model('Data', { name: String }); // Define the route for pagination app.get('/data', (req, res) => { // Get the page number and page size from the query parameters const pageNumber = req.query.page || 1; const pageSize = req.query.size || 10; // Calculate the skip and limit for the query const skip = (pageNumber - 1) * pageSize; const limit = pageSize; // Find the data in the database, skipping and limiting as necessary Data.find({}).skip(skip).limit(limit).exec((err, data) => { if (err) { res.status(500).send(err); } else { res.json(data); } }); }); // Start the server app.listen(3000, () => { console.log('Server started on port 3000'); }); This is a very basic example that demonstrates the basic concepts of pagination. In a real-world application, you would likely want to add additional error handling, validation, and security. You can also use other libraries like mongoose-pagination, mongoose-paginate-v2, mongoose-paginator, etc that can make the pagination process more easy and efficient.