© 2026 Hedgehog Software, LLC

TwitterGitHubDiscord
More
CommunitiesDocsAboutTermsPrivacy
Search
Star
Setup for Free
Cloudflare DevelopersCD
Cloudflare Developers•2y ago•
2 replies
Kuuba_

No such module "node:buffer". imported from "worker.js"

Hello.
I'm trying to deploy basic-auth worker - https://developers.cloudflare.com/workers/examples/basic-auth/ but I'm getting following error:
Uncaught Error: No such module "node:buffer". imported from "worker.js" (Code: 10021)
Uncaught Error: No such module "node:buffer". imported from "worker.js" (Code: 10021)
when I click "Save and deploy".
I have worker.js file (content as in docs) and wrangler.toml file with compatibility_flags (content below). Do you have any idea how can I fix this?
compatibility_flags = [ "nodejs_compat" ]
compatibility_flags = [ "nodejs_compat" ]
Cloudflare Docs
HTTP Basic Authentication · Cloudflare Workers docs
Documentation for Cloudflare Workers, a serverless execution environment that allows you to create entirely new applications or augment existing ones …
HTTP Basic Authentication · Cloudflare Workers docs
Cloudflare Developers banner
Cloudflare DevelopersJoin
Welcome to the official Cloudflare Developers server. Here you can ask for help and stay updated with the latest news
85,042Members
Resources

Similar Threads

Was this page helpful?
Recent Announcements

Similar Threads

Uncaught Error: No such module "node:buffer". imported from "worker.js" (Code: 10021)
Cloudflare DevelopersCDCloudflare Developers / workers-and-pages-help
2y ago
No such module "node:events"
Cloudflare DevelopersCDCloudflare Developers / workers-and-pages-help
17mo ago
[ERROR] Error: No such module "chunks/pages/buffer".
Cloudflare DevelopersCDCloudflare Developers / workers-and-pages-help
2y ago
Uncaught Error: No such module " node:buffe
Cloudflare DevelopersCDCloudflare Developers / workers-and-pages-help
2y ago