Skip to main content

API reference Examples Deno Deploy

⌘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

Deno

.

.

ArrowFunctionExpression

.

returnType

property Deno.lint.ArrowFunctionExpression.returnType

Type #

TSTypeAnnotation | undefined

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

Type

Deno Docs

Deno Runtime
Examples
Standard Library
Deno API Reference

Services Docs

Deno Deploy
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
Merch
Privacy Policy
LLMs

Copyright © 2026 the Deno authors.