Tools for managing state, scheduling tasks, and interacting with key-value stores.

Eg Deno.openKv, Deno.cron

Error types and utilities for handling exceptions and custom error scenarios. Helps improve error handling and debugging.

Eg Deno.errors.NotFound

Foreign Function Interface. Call functions from shared libraries (e.g., C/C++) directly from Deno.

Useful for integrating with existing native code or accessing low-level system functionality.

Eg Deno.dlopen

HTTP client for fetching data across a network. Retrieve resources from servers, handle responses, and manage network requests.

Eg fetch, Response, Request, Headers

File System APIs for working with files, directories, and file metadata. Includes functions for reading, writing, and manipulating file paths.

Eg Deno.readDir, Deno.readTextFile

GPU programming and rendering. Efficiently use a device’s graphics processing unit (GPU) for high-performance computations and complex image rendering.

Eg GPUDevice

Handling HTTP requests, serving responses, and managing server behavior.

Eg Deno.serveHttp, Deno.serve

Interfaces for reading, writing, seeking, and managing resources. For handling of data streams, file I/O, and console interactions.

Eg Deno.stdin, Deno.inspect

Create interactive notebooks and execute code cells. Useful for data analysis, visualization, and educational purposes.

Eg Deno.jupyter

A wide range of networking tasks, from low-level connections to high-level server creation. Handle HTTP requests, WebSocket communication, and DNS resolution. Useful for building web servers, clients, and networking tools.

Eg Deno.connect, Deno.listen, Deno.resolveDns

Permission system controls access to resources (e.g., file system, network, environment variables).

Request permissions explicitly, enhancing security and user trust.

Eg Deno.permissions

System-related functionality, process management, and observability.

Eg Deno.mainModule, Deno.exit, Deno.cwd

Spawn and manage child processes, execute commands, and collect output. Useful for executing external programs from Deno.

Eg Deno.Command

Robust testing and benchmarking capabilities to ensure code quality and performance.

Eg Deno.test, Deno.bench

Enable real-time communication between clients and servers using WebSockets. Tools to create interactive and dynamic applications.

Eg WebSocket