Skip to main content

API reference Examples Services

⌘K

↑↓Up or down tonavigate↵Enter toselectESCEscape toclose

Deno APIs

Deno specific APIs
All Deno symbols

Web APIs

Web Platform Support
All web symbols

Node APIs

Node support in deno
All node symbols

Node

stream/web

UnderlyingSourceCancelCallback

interface UnderlyingSourceCancelCallback

Call Signatures #

(reason?: any): void | PromiseLike<void>

Did you find what you needed?

YesNo

What can we do to improve this page?

GitHub username (optional)

If provided, you'll be @mentioned in the created GitHub issue

Call Signatures

Deno Docs

Deno Runtime
Examples
Standard Library
Deno API Reference

Services Docs

Deno Deploy ^EA
Deno Deploy Classic
Deno Subhosting

Community

Discord
GitHub
YouTube
Bluesky
Mastodon
Twitter
Newsletter

Help & Feedback

Community Support
Deploy System Status
Deploy Feedback
Report a Problem

Company

Deno Website
Blog
Careers
Merch
Privacy Policy

Copyright © 2025 the Deno authors.