Deno cheat sheet v1.43

File System

• Deno.chmod() / sync

• Deno.chown() / sync

• Deno.copyFile() / sync

• Deno.create() / sync

• Deno.FsFile

• Deno.isatty() deprecated

• Deno.link() / sync

• Deno.lstat() / sync deploy

• Deno.makeTempDir() / sync

• Deno.makeTempFile() / sync

• Deno.mkdir() / sync

• Deno.readDir() / sync deploy

• Deno.readFile / sync

• Deno.readLink() / sync

• Deno.readTextFile() / sync deploy

• Deno.realPath() / sync deploy

• Deno.remove() / sync

• Deno.rename() / sync

• Deno.stat() / sync deploy

• Deno.symlink() / sync

• Deno.truncate() / sync

• Deno.utime() / sync

• Deno.watchFs()

• Deno.writeFile() / sync

• Deno.writeTextFile() / sync

Tools

• Deno.bench()

• Deno.cron()

• Deno.test()

Resources

• Deno.close() deprecated

• Deno.fdatasync() / sync

• Deno.flock() / sync unstable deprecated

• Deno.fstat() / sync deprecated

• Deno.fsync() / sync

• Deno.ftruncate() / sync deprecated

• Deno.funlock() / sync unstable deprecated

• Deno.futime() / sync

• Deno.open() / sync deploy

• Deno.read() / sync deprecated

• Deno.resources() deprecated

• Deno.seek() / sync

• Deno.write() / sync deprecated

FFI (Foreign Function Interface)

• Deno.dlopen() unstable

• Deno.UnsafeFnPointer unstable

• Deno.UnsafePointerView unstable

KV

• Deno.AtomicOperation unstable

• Deno.Kv unstable

• Deno.KvListIterator unstable

• Deno.KvU64 unstable

• Deno.openKv() unstable

Errors

• Deno.errors.AddrInUse

• Deno.errors.AddrNotAvailable

• Deno.errors.AlreadyExists

• Deno.errors.BadResource

• Deno.errors.BrokenPipe

• Deno.errors.Busy

• Deno.errors.ConnectionAborted

• Deno.errors.ConnectionRefused

• Deno.errors.ConnectionReset

• Deno.errors.FilesystemLoop

• Deno.errors.Http

• Deno.errors.Interrupted

• Deno.errors.InvalidData

• Deno.errors.IsADirectory

• Deno.errors.NetworkUnreachable

• Deno.errors.NotADirectory

• Deno.errors.NotConnected

• Deno.errors.NotFound

• Deno.errors.NotSupported

• Deno.errors.PermissionDenied

• Deno.errors.TimedOut

• Deno.errors.UnexpectedEof

• Deno.errors.WriteZero

Subprocesses

• Deno.Command

• Deno.kill()

• Deno.Process

• Deno.run() deprecated

Runtime utils

• Deno.addSignalListener()

• Deno.args

• Deno.build

• Deno.chdir()

• Deno.consoleSize()

• Deno.cwd() deploy

• Deno.DiagnosticCategory unstable

• Deno.env deploy

• Deno.execPath()

• Deno.exit()

• Deno.gid()

• Deno.hostname()

• Deno.inspect()

• Deno.loadavg()

• Deno.mainModule

• Deno.memoryUsage()

• Deno.metrics() deprecated

• Deno.noColor

• Deno.osRelease()

• Deno.osUptime()

• Deno.permissions

• Deno.PermissionStatus

• Deno.pid

• Deno.ppid

• Deno.refTimer()

• Deno.removeSignalListener()

• Deno.stderr

• Deno.stdin

• Deno.stdout

• Deno.systemMemoryInfo()

• Deno.uid()

• Deno.umask() unstable

• Deno.unrefTimer()

• Deno.version

Network

• Deno.connect() deploy

• Deno.connect() unstable

• Deno.connectTls() deploy

• Deno.connectTls() unstable

• Deno.createHttpClient() unstable

• Deno.HttpClient unstable

• Deno.listen()

• Deno.listen() unstable

• Deno.listenDatagram() unstable

• Deno.listenTls()

• Deno.networkInterfaces()

• Deno.resolveDns() deploy

• Deno.serve()

• Deno.serveHttp()

• Deno.shutdown()

• Deno.startTls() deploy

• Deno.upgradeWebSocket()

Window

• alert()

• confirm()

• console deploy

• location

• name

• navigator

• prompt()

• self

• window deprecated

Async

• clearInterval() deploy

• clearTimeout() deploy

• queueMicrotask() deploy

• setInterval() deploy

• setTimeout() deploy

Fetch & URLs

• fetch() deploy

• FormData

• Headers deploy

• Request deploy

• Response deploy

• URL deploy

• URLPattern deploy

• URLSearchParams

Websocket

• WebSocket deploy

• WebSocketStream unstable

EventSource

• EventSource

Web Workers

• Worker

Message

• MessageChannel

• MessagePort

Performance

• performance deploy

• PerformanceEntry deploy

• PerformanceMark deploy

• PerformanceMeasure deploy

Temporal

• Temporal.Calendar unstable

• Temporal.Duration unstable

• Temporal.Instant unstable

• Temporal.PlainDate unstable

• Temporal.PlainDateTime unstable

• Temporal.PlainMonthDay unstable

• Temporal.PlainTime unstable

• Temporal.TimeZone unstable

• Temporal.ZonedDateTime unstable

Storage

• localStorage

• sessionStorage

File

• Blob deploy

• File deploy

• FileReader

TextEncoder

• TextDecoder deploy

• TextDecoderStream deploy

• TextEncoder deploy

• TextEncoderStream deploy

Streams

• ByteLengthQueuingStrategy

• CountQueuingStrategy

• ReadableByteStreamController

• ReadableStream deploy

• ReadableStreamDefaultController

• ReadableStreamDefaultReader

• ReadableStreamReader

• TransformStream deploy

• TransformStreamDefaultController

• WritableStream

• WritableStreamDefaultController deploy

• WritableStreamDefaultWriter

Compression Streams

• CompressionStream

• DecompressionStream

Cache

• Cache

• CacheStorage

Events

• addEventListener()

• CloseEvent

• CustomEvent

• dispatchEvent()

• Event

• EventTarget

• MessageEvent

• onload

• onunload

• ProgressEvent

• removeEventListener()

Errors

• DOMException

• ErrorEvent

• onerror

• reportError()

AbortController

• AbortController

• AbortSignal

CryptoKey

• crypto deploy

• CryptoKey

• CryptoKeyPair

• SubtleCrypto deploy

Binary to ASCII

• atob() deploy

• btoa() deploy

Broadcast Channel

• BroadcastChannel deploy

Structured Clone

• structuredClone()

Image Data

• ImageData

WebAssembly

• WebAssembly.compile()

• WebAssembly.CompileError

• WebAssembly.compileStreaming()

• WebAssembly.Global

• WebAssembly.Instance

• WebAssembly.instantiate()

• WebAssembly.instantiateStreaming()

• WebAssembly.LinkError

• WebAssembly.Memory

• WebAssembly.Module

• WebAssembly.RuntimeError

• WebAssembly.Table

• WebAssembly.validate()

WebGPU

• GPU

• GPUAdapter

• GPUAdapterInfo

• GPUBindGroup

• GPUBindGroupLayout

• GPUBuffer

• GPUBufferUsage

• GPUColorWrite

• GPUCommandBuffer

• GPUCommandEncoder

• GPUComputePassEncoder

• GPUComputePipeline

• GPUDevice

• GPUMapMode

• GPUOutOfMemoryError

• GPUPipelineLayout

• GPUQuerySet

• GPUQueue

• GPURenderBundle

• GPURenderBundleEncoder

• GPURenderPassEncoder

• GPURenderPipeline

• GPUSampler

• GPUShaderModule

• GPUShaderStage

• GPUSupportedFeatures

• GPUSupportedLimits

• GPUTexture

• GPUTextureUsage

• GPUTextureView

• GPUValidationError

Archive/Tar

Provides a Tar and Untar classes for compressing and decompressing arbitrary data.

Async

Provide help with asynchronous tasks like delays, debouncing, deferring, or pooling.

Bytes

Provides helper functions to manipulate Uint8Array byte slices that are not included on the Uint8Array prototype.

CLI

Tools for creating interactive command line tools.

Collections

Functions for specific common tasks around collection types like Array and Record.

Crypto

Extensions to the Web Crypto supporting additional encryption APIs.

CSV   Browser

Encode and decode for CSV.

Datetime   Browser

Utilities for dealing with Date objects.

Data structures

This module exports classes that implements data structure algorithms.

Dotenv

Load environment variables from .env files.

Encoding/ascii85   Browser

Encode and decode for Ascii85/base85 encoding.

Encoding/base32   Browser

Encode and decode for base32 encoding.

Encoding/base58   Browser

Encode and decode for base58 encoding.

Encoding/base64   Browser

Encode and decode for base64 encoding.

Encoding/base64 (URL safe)   Browser

Encode and decode for base64 URL safe encoding.

Encoding/binary

Functions for encoding binary data in array buffers.

Encoding/hex   Browser

Port of the Go encoding/hex library.

Encoding/varint

Functions for encoding typed integers in array buffers.

Expect

This module provides jest compatible expect assertion functionality.

Flags   Browser

Command line arguments parser based on minimist.

Fmt/bytes   Browser

Pretty print bytes.

Fmt/colors   Browser

String formatters and utilities for dealing with ANSI color codes.

Fmt/printf

Sprintf and printf for printing formatted strings to stdout.

Front matter   Browser

Extract front matter from strings.

FS

Helpers for working with the filesystem.

HTML/Entities

Functions for HTML tasks such as escaping or unescaping HTML entities.

HTTP

Provides user-friendly serve on top of Deno's native HTTP server and other utilities for creating HTTP servers and clients.

Ini

parse and stringify for handling INI encoded data, such as the Desktop Entry specification.

JSON

Functions for parsing and stringify JSON data.

JSONC

Function for parsing JSONC (JSON with comments) strings.

Log

Logging library with the support for terminal and file outputs. Also provides interfaces for building custom loggers.

Media types

Utility functions for media types (MIME types).

Net

Network utilities.

Path   Browser

Utilities for working with OS-specific file paths.

Permissions

Helpers for interacting with Deno's permissions system.

Semver   Browser

The semantic version parser. Adapted directly from semver.

Signal

Higher level API for dealing with OS signals.

Streams

Utilities for working with the Streams API. Includes buffering and conversion.

Testing/asserts   Browser

A library of assertion functions.

Testing/bdd

A BDD interface to Deno.test() API.

Testing/mock   Browser

A mocking and spying library.

Testing/snapshot

A snapshotting library.

Testing/time   Browser

Utilities for mocking time while testing.

Text

This module exports utility functions for comparing/sorting/choosing texts with certain criteria.

TOML   Browser

Parse and stringify functions for handling TOML encoded data.

ULID   Browser

Utilities for generating ULID and decoding the timestamp from the given ULID.

URL   Browser

Utilities for working with URL paths.

UUID   Browser

Generators and validators for UUIDs for versions v1, v4 and v5.

YAML   Browser

Parse and stringify for handling YAML encoded data.

Web GPU

Utilities for interacting with the WebGPU API.