Deploy express JS to netlify

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I’m currently deploying my express file to netlify platform. All the tutorials are showing to use netlify-lambda package. But the package is deprecated and advised to use netlify cli. But for build command, tutorials suggesting netlify-lambda build, which is deprecated. I used normal build method like, ‘build application.js’. The sites deploys because I pointed correct folder path for fronted, but unfortunately api calls not working. It’s working with netlify-lambda build command, but as it’s deprecated it’s not a good approach. So can I know how to deploy with latest method?

2

Have you read through this article?

3

Yes. If you go through the application example provided, in github repo, you can see it’s uses netlify-lamda as well. Which is deprecated as I mentioned. So I need a solution that doesn’t inquire netlify-lambda as it’s deprecated and it’s already has High vulnerabilities, which I don’t think a good approach to use. So I’m waiting for a new solution. Thanks for the help though, I appreciate that

4

Here’s a live example: netlify-file-browser/api.js at v2 · Hrishikesh-K/netlify-file-browser · GitHub

1 Like
5

I need the build command in package.json , because my application already works fine in netlify with API calls, but with netlify-lambda which is deprecated. So if you can provide package.json or at least build comamnd, that would be helpful. Thank you for your response though

6

That’s an entire repo which has everything you need though?

But to answer your question, there’s no build command for Functions. Functions are built and packaged automatically.

7

Yes if there’s an updated guide that would helpful. Otherwise I guess we are again in square 1 in this discussion loop.

10

There’s no guide, nothing official from Netlify at least. You need to follow Netlify Functions’ documentation: Functions overview | Netlify Docs and write a function like this (just the minimum bare-bones):

import express, {Router} from 'express'
import serverless from 'serverless-http'
export async function handler(event, context) {
  const app = express()
  const router = Router()
  app.use('/api/', router)
  return serverless(app)(event, context)
}

add the following to your netlify.toml:

[functions]
  external_node_modules = ["express"]
  node_bundler = "esbuild"
[[redirects]]
  force = true
  from = "/api/*"
  status = 200
  to = "/.netlify/functions/api/:splat"

and that’s it.

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12

@Cutting_Edge,

We’ve updated our docs: Express on Netlify | Netlify Docs to make this more clear.

1 Like
13

I have followed Express on Netlify | Netlify Docs precisely and it only ever results in a default Netlify 404 page.

my netlify.toml:

[build]
  command = "echo Building functions"
[functions]
  external_node_modules = ["express"]
  node_bundler = "esbuild"
[[redirects]]
  force = true
  from = "/api/*"
  status = 200
  to = "/.netlify/functions/api/:splat"

and my netlify/functions/api.mjs:

import express, { Router } from 'express';
import serverless from 'serverless-http';

export async function handler(event, context) {
  const app = express();
  const router = Router();
  router.get('/', (req, res) => res.send('Hello World!'));
  app.use('/api/', router);
  return serverless(app)(event, context);
};

using node v20. is there something that’s changed in the last year that would cause this?

14

adding functions = "netlify/functions/" under the [build] section in the netlify.toml file seems to fix it.