Deno Runtime API
The Deno Runtime API is the built-in namespace of globals and modules available to all programs running on the Deno JavaScript and TypeScript runtime. It provides access to filesystem operations, networking, process management, cryptography, subprocesses, permissions, and environment variables via the Deno.* namespace. The runtime natively supports TypeScript without additional tooling and implements Web Platform APIs such as fetch, WebSocket, URL, and Web Crypto.