adapter-aws-lambda

Installation

npm i @jaecktec/adapter-aws-lambda

A sveltekit adapter for AWS Lambda

If for some reason you need your sveltekit app to run entirely on AWS Lambda, this adapter is for you. Example UseCase: You want to run your sveltekit app on AWS Lambda behind an ALB.

If you want to deploy on Lambda + Cloudfront this adapter is not for you, check out sveltekit-aws-adapter. Running entirely on Lambda is less performant and more expensive than using Cloudfront, but the deployment setup simpler which might be useful for small projects.

Example Usage with Vite and AWS CDK

// svelte.config.js
import adapter from '@jaecktec/adapter-aws-lambda';
import { vitePreprocess } from '@sveltejs/vite-plugin-svelte';

/** @type {import('@sveltejs/kit').Config} */
const config = {
	preprocess: vitePreprocess(),
	kit: {
		adapter: adapter()
	}
};

export default config;

// vite.config.js
import { sveltekit } from '@sveltejs/kit/vite';
import { defineConfig } from 'vite';
import zipPack from "vite-plugin-zip-pack";

export default defineConfig({
	build: {
	},
	plugins: [
		sveltekit(),
		zipPack({
			inDir: 'build',
			outDir: 'build',
			outFileName: 'bundle.zip',
		}),
	]
});

// cdk.ts
import * as cdk from 'aws-cdk-lib';

const app = new cdk.App();
const stack = new cdk.Stack(app, 'app-stack');

const fn = new Function(this, 'lambda', {
	handler: 'index.awsHandler',
	runtime: Runtime.NODEJS_22_X,
	memorySize: 256,
	code: Code.fromAsset('./build/bundle.zip'),
})
const fnUrl = fn.addFunctionUrl({
	authType: FunctionUrlAuthType.NONE,
	cors: {
		allowedOrigins: ['*'],
		allowedMethods: [HttpMethod.ALL],
		allowedHeaders: ['*'],
	}
});

Notes

This work is 99% based on @sveltejs/adapter-node and lambda-request-handler - the biggest change is adding a package.json + a lambda entrypoint utilising the request handler

License

This project is licensed under the MIT License.