swagger in nodejs

 npm install express swagger-jsdoc swagger-ui-express

const express = require('express');

const swaggerJSDoc = require('swagger-jsdoc');

const swaggerUI = require('swagger-ui-express');

const app = express();

const port = 3000;

// Swagger configuration

const swaggerOptions = {

  definition: {

    openapi: '3.0.0',

    info: {

      title: 'Your API Title',

      version: '1.0.0',

      description: 'API Documentation using Swagger',

    },

  },

  apis: ['./routes/*.js'], // Path to the API routes

};

const swaggerSpec = swaggerJSDoc(swaggerOptions);

// Serve Swagger UI at /api-docs

app.use('/api-docs', swaggerUI.serve, swaggerUI.setup(swaggerSpec));

// Define your API routes here (replace with your actual routes)

app.get('/', (req, res) => {

  res.send('Hello, Swagger!');

});

// Start the server

app.listen(port, () => {

  console.log(`Server is running at http://localhost:${port}`);

});