Regarding swagger is not working in nodejs as per the swagger document.

Hi asaddev ,

Typically when we see raw HTML coming back, it's because express is treating that route as "text/plain" or similar. Look to see if req.type() is being called before your call to swaggerUi.serve. Or some other method that would change the "Content-Type" of the response.

You can confirm the Content-Type is bad, by using curl or similar..

curl -i http://localhost:3000/api-docs
#...
HTTP/1.1 200 OK
X-Powered-By: Express
Content-Type: text/html; charset=utf-8 <------ Good content-type
#...

Here is a minimal index.js that works...

const swaggerUi = require('swagger-ui-express')
const swaggerDocument = require('./swagger.json')
const express = require('express')

const app = express()
app.use(
    '/api-docs',
    swaggerUi.serve,
    swaggerUi.setup(swaggerDocument)
);

const server = app.listen(3000, () => {
    console.log(`Server running at ${server.address().port}`);
});

asaddev  I'm not sure what else you have on your stack, nor why your browser is showing the raw HTML.

Some things you can follow up on.

See if the redirect URL has a different content-type (since /api-docs redirects to /api-docs/, note the trailing slash)

curl -iL http://localhost:3000/api-docs/
# Content-Type?

And for completeness you can try with the following versions...

  "dependencies": {
    "express": "^4.18.2",
    "swagger-ui-express": "^4.6.2"
  }

Node: v18.7.0.

Tested with/without es6 imports (try without, using the minimal example above).
 

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Hey

If Swagger is not working in your Node.js application as per the Swagger documentation, the issue might be related to incorrect configuration, version compatibility, or missing dependencies. Double-check that your Swagger setup aligns with the latest documentation, and ensure all necessary middleware and packages are correctly installed and configured.

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