Deno.errors.NotSupported | Runtime APIs | Deno

Skip to main content

Using Deno in production at your company? Earn free Deno merch.

Give us feedback

Menu

Go to LatestShow Unstable API

Cache

CacheQueryOptions

Canvas

ImageBitmapOptions

ColorSpaceConversion

ImageBitmapSource

ImageOrientation

PremultiplyAlpha

createImageBitmap

Cloud

Deno.AtomicOperation

Deno.KvListIterator

Deno.AtomicCheck

Deno.CronSchedule

Deno.KvCommitError

Deno.KvCommitResult

Deno.KvListOptions

Deno.CronScheduleExpression

Deno.KvConsistencyLevel

Deno.KvEntryMaybe

Deno.KvListSelector

Deno.KvMutation

Crypto

AesDerivedKeyParams

AesKeyAlgorithm

AesKeyGenParams

EcdhKeyDeriveParams

EcKeyImportParams

HmacImportParams

HmacKeyAlgorithm

HmacKeyGenParams

RsaHashedImportParams

RsaHashedKeyAlgorithm

RsaHashedKeyGenParams

RsaKeyAlgorithm

RsaKeyGenParams

RsaOtherPrimesInfo

AlgorithmIdentifier

HashAlgorithmIdentifier

Encoding

TextDecodeOptions

TextDecoderOptions

TextDecoderStream

TextEncoderEncodeIntoResult

TextEncoderStream

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.WouldBlock

Deno.errors.WriteZero

Events

AddEventListenerOptions

CustomEventInit

EventListenerObject

EventListenerOptions

MessageEventInit

ProgressEventInit

PromiseRejectionEvent

PromiseRejectionEventInit

EventListenerOrEventListenerObject

PostMessageOptions

onunhandledrejection

addEventListener

removeEventListener

Fetch

Deno.CreateHttpClientOptions

Deno.HttpClient

EventSourceEventMap

EventSourceInit

FormDataEntryValue

RequestCredentials

RequestDestination

RequestRedirect

Deno.createHttpClient

FFI

Deno.UnsafeCallback

Deno.UnsafeFnPointer

Deno.UnsafePointer

Deno.UnsafePointerView

Deno.DynamicLibrary

Deno.ForeignFunction

Deno.ForeignLibraryInterface

Deno.ForeignStatic

Deno.UnsafeCallbackDefinition

Deno.ConditionalAsync

Deno.FromForeignFunction

Deno.FromNativeParameterTypes

Deno.FromNativeResultType

Deno.FromNativeType

Deno.NativeBigIntType

Deno.NativeBooleanType

Deno.NativeBufferType

Deno.NativeFunctionType

Deno.NativeI16Enum

Deno.NativeI32Enum

Deno.NativeI8Enum

Deno.NativeNumberType

Deno.NativePointerType

Deno.NativeResultType

Deno.NativeStructType

Deno.NativeType

Deno.NativeTypedFunction

Deno.NativeTypedPointer

Deno.NativeU16Enum

Deno.NativeU32Enum

Deno.NativeU8Enum

Deno.NativeVoidType

Deno.PointerObject

Deno.PointerValue

Deno.StaticForeignLibraryInterface

Deno.StaticForeignSymbol

Deno.StaticForeignSymbolReturnType

Deno.ToNativeParameterTypes

Deno.ToNativeResultType

Deno.ToNativeType

Deno.UnsafeCallbackFunction

File

BlobPropertyBag

FilePropertyBag

FileReaderEventMap

File System

Deno.MakeTempOptions

Deno.MkdirOptions

Deno.OpenOptions

Deno.ReadFileOptions

Deno.RemoveOptions

Deno.SymlinkOptions

Deno.WriteFileOptions

Deno.FsEventFlag

Deno.copyFileSync

Deno.createSync

Deno.fdatasyncSync

Deno.ftruncateSync

Deno.funlockSync

Deno.futimeSync

Deno.makeTempDir

Deno.makeTempDirSync

Deno.makeTempFile

Deno.makeTempFileSync

Deno.readDirSync

Deno.readFileSync

Deno.readLinkSync

Deno.readTextFile

Deno.readTextFileSync

Deno.realPathSync

Deno.removeSync

Deno.renameSync

Deno.symlinkSync

Deno.truncateSync

Deno.writeFileSync

Deno.writeTextFile

Deno.writeTextFileSync

GPU

Deno.UnsafeWindowSurface

GPUBindGroupLayout

GPUCommandBuffer

GPUCommandEncoder

GPUComputePassEncoder

GPUComputePipeline

GPUInternalError

GPUOutOfMemoryError

GPUPipelineError

GPUPipelineLayout

GPURenderBundle

GPURenderBundleEncoder

GPURenderPassEncoder

GPURenderPipeline

GPUShaderModule

GPUSupportedFeatures

GPUSupportedLimits

GPUTextureUsage

GPUUncapturedErrorEvent

GPUValidationError

GPUBindGroupDescriptor

GPUBindGroupEntry

GPUBindGroupLayoutDescriptor

GPUBindGroupLayoutEntry

GPUBlendComponent

GPUBufferBinding

GPUBufferBindingLayout

GPUBufferDescriptor

GPUCanvasConfiguration

GPUCanvasContext

GPUColorTargetState

GPUCommandBufferDescriptor

GPUCommandEncoderDescriptor

GPUCompilationInfo

GPUCompilationMessage

GPUComputePassDescriptor

GPUComputePassTimestampWrites

GPUComputePipelineDescriptor

GPUDepthStencilState

GPUDeviceDescriptor

GPUDeviceLostInfo

GPUExtent3DDict

GPUFragmentState

GPUImageCopyBuffer

GPUImageCopyTexture

GPUImageDataLayout

GPUMultisampleState

GPUObjectDescriptorBase

GPUOrigin3DDict

GPUPipelineBase

GPUPipelineDescriptorBase

GPUPipelineErrorInit

GPUPipelineLayoutDescriptor

GPUPrimitiveState

GPUProgrammablePassEncoder

GPUProgrammableStage

GPUQuerySetDescriptor

GPURenderBundleDescriptor

GPURenderBundleEncoderDescriptor

GPURenderEncoderBase

GPURenderPassColorAttachment

GPURenderPassDepthStencilAttachment

GPURenderPassDescriptor

GPURenderPassLayout

GPURenderPassTimestampWrites

GPURenderPipelineDescriptor

GPURequestAdapterOptions

GPUSamplerBindingLayout

GPUSamplerDescriptor

GPUShaderModuleDescriptor

GPUStencilFaceState

GPUStorageTextureBindingLayout

GPUTextureBindingLayout

GPUTextureDescriptor

GPUTextureViewDescriptor

GPUUncapturedErrorEventInit

GPUVertexAttribute

GPUVertexBufferLayout

GPUAutoLayoutMode

GPUBindingResource

GPUBlendOperation

GPUBufferBindingType

GPUBufferMapState

GPUBufferUsageFlags

GPUCanvasAlphaMode

GPUColorWriteFlags

GPUCompareFunction

GPUCompilationMessageType

GPUDeviceLostReason

GPUFlagsConstant

GPUMapModeFlags

GPUMipmapFilterMode

GPUPipelineErrorReason

GPUPowerPreference

GPUPrimitiveTopology

GPUSamplerBindingType

GPUShaderStageFlags

GPUStencilOperation

GPUStorageTextureAccess

GPUTextureAspect

GPUTextureDimension

GPUTextureFormat

GPUTextureSampleType

GPUTextureUsageFlags

GPUTextureViewDimension

GPUVertexFormat

GPUVertexStepMode

HTTP Server

Deno.HttpServer

Deno.RequestEvent

Deno.ServeHandlerInfo

Deno.ServeOptions

Deno.ServeTlsInit

Deno.ServeTlsOptions

Deno.ServeUnixHandlerInfo

Deno.ServeUnixInit

Deno.ServeUnixOptions

Deno.ServeHandler

Deno.ServeUnixHandler

I/O

Deno.InspectOptions

Deno.ReaderSync

Deno.SeekerSync

Deno.SetRawOptions

Deno.WriterSync

Deno.customInspect

Deno.consoleSize

Deno.readAllSync

Deno.writeAllSync

Intl

Intl.DateTimeFormat

Intl.DateTimeFormatOptions

Intl.DateTimeFormatRangePart

Intl.Formattable

Jupyter

Deno.jupyter.DisplayOptions

Deno.jupyter.Displayable

Deno.jupyter.MediaBundle

Deno.jupyter.VegaObject

Deno.jupyter.$display

Deno.jupyter.broadcast

Deno.jupyter.display

Deno.jupyter.format

Deno.jupyter.html

Deno.jupyter.md

Deno.jupyter.svg

Messaging

BroadcastChannel

BroadcastChannelEventMap

MessagePortEventMap

Network

Deno.ConnectOptions

Deno.ConnectTlsOptions

Deno.DatagramConn

Deno.ListenOptions

Deno.ListenTlsOptions

Deno.MulticastV4Membership

Deno.MulticastV6Membership

Deno.NAPTRRecord

Deno.NetworkInterfaceInfo

Deno.ResolveDnsOptions

Deno.StartTlsOptions

Deno.TcpListenOptions

Deno.TlsCertifiedKeyConnectTls

Deno.TlsCertifiedKeyFromFile

Deno.TlsCertifiedKeyPem

Deno.TlsHandshakeInfo

Deno.UdpListenOptions

Deno.UnixConnectOptions

Deno.UnixListenOptions

Deno.RecordType

Deno.TcpListener

Deno.TlsCertifiedKeyOptions

Deno.TlsListener

Deno.UnixListener

Deno.connectTls

Deno.listenDatagram

Deno.networkInterfaces

Deno.resolveDns

Performance

PerformanceEntry

PerformanceMark

PerformanceMarkOptions

PerformanceMeasure

PerformanceMeasureOptions

PerformanceEntryList

Permissions

Deno.Permissions

Deno.PermissionStatus

Deno.EnvPermissionDescriptor

Deno.FfiPermissionDescriptor

Deno.HrtimePermissionDescriptor

Deno.NetPermissionDescriptor

Deno.PermissionOptionsObject

Deno.PermissionStatusEventMap

Deno.ReadPermissionDescriptor

Deno.RunPermissionDescriptor

Deno.SysPermissionDescriptor

Deno.WritePermissionDescriptor

Deno.PermissionDescriptor

Deno.PermissionName

Deno.PermissionOptions

Deno.PermissionState

Deno.permissions

Platform

AbortController

AbortSignalEventMap

ErrorConstructor

Float16ArrayConstructor

Float16Constructor

ImageDataSettings

StructuredSerializeOptions

PredefinedColorSpace

structuredClone

Runtime

Deno.MemoryUsage

Deno.ResourceMap

Deno.SystemMemoryInfo

Deno.mainModule

Deno.addSignalListener

Deno.memoryUsage

Deno.removeSignalListener

Deno.systemMemoryInfo

Deno.unrefTimer

Storage

Streams

ByteLengthQueuingStrategy

CompressionStream

CountQueuingStrategy

DecompressionStream

QueuingStrategy

QueuingStrategySizeCallback

ReadableByteStreamController

ReadableByteStreamControllerCallback

ReadableStreamBYOBReadDoneResult

ReadableStreamBYOBReader

ReadableStreamBYOBReaderReadOptions

ReadableStreamBYOBReadValueResult

ReadableStreamBYOBRequest

ReadableStreamDefaultController

ReadableStreamDefaultControllerCallback

ReadableStreamDefaultReadDoneResult

ReadableStreamDefaultReader

ReadableStreamDefaultReadValueResult

ReadableStreamErrorCallback

TransformStream

TransformStreamDefaultController

TransformStreamDefaultControllerCallback

TransformStreamDefaultControllerTransformCallback

UnderlyingByteSource

UnderlyingSource

WritableStreamDefaultController

WritableStreamDefaultControllerCloseCallback

WritableStreamDefaultControllerStartCallback

WritableStreamDefaultControllerWriteCallback

WritableStreamDefaultWriter

WritableStreamErrorCallback

ReadableStreamBYOBReadResult

ReadableStreamDefaultReadResult

Sub Process

Deno.ChildProcess

Deno.CommandOptions

Deno.CommandOutput

Deno.CommandStatus

Deno.RunOptions

Deno.UnstableRunOptions

Deno.ProcessStatus

Temporal

Temporal.Calendar

Temporal.Duration

Temporal.Instant

Temporal.PlainDate

Temporal.PlainDateTime

Temporal.PlainMonthDay

Temporal.PlainTime

Temporal.PlainYearMonth

Temporal.TimeZone

Temporal.ZonedDateTime

Temporal.CalendarProtocol

Temporal.DifferenceOptions

Temporal.DurationArithmeticOptions

Temporal.TimeZoneProtocol

Temporal.ArithmeticOptions

Temporal.AssignmentOptions

Temporal.CalendarLike

Temporal.CalendarTypeToStringOptions

Temporal.ComparisonResult

Temporal.DateTimeUnit

Temporal.DateUnit

Temporal.DurationLike

Temporal.DurationOptions

Temporal.DurationRoundTo

Temporal.DurationTotalOf

Temporal.InstantToStringOptions

Temporal.LargestUnit

Temporal.MonthCodeOrMonthAndYear

Temporal.MonthOrMonthCode

Temporal.OffsetDisambiguationOptions

Temporal.PlainDateISOFields

Temporal.PlainDateLike

Temporal.PlainDateTimeISOFields

Temporal.PlainDateTimeLike

Temporal.PlainMonthDayLike

Temporal.PlainTimeISOFields

Temporal.PlainTimeLike

Temporal.PlainYearMonthLike

Temporal.PluralUnit

Temporal.RoundingMode

Temporal.RoundTo

Temporal.ShowCalendarOption

Temporal.SmallestUnit

Temporal.TimeUnit

Temporal.TimeZoneLike

Temporal.ToInstantOptions

Temporal.ToStringPrecisionOptions

Temporal.TotalUnit

Temporal.YearOrEraAndEraYear

Temporal.ZonedDateTimeAssignmentOptions

Temporal.ZonedDateTimeISOFields

Temporal.ZonedDateTimeLike

Temporal.ZonedDateTimeToStringOptions

Testing

Deno.BenchContext

Deno.BenchDefinition

Deno.TestContext

Deno.TestDefinition

Deno.TestStepDefinition

URL

URLPatternComponentResult

URLPatternResult

URLSearchParams

URLPatternInput

WASM

WebAssembly.CompileError

WebAssembly.Global

WebAssembly.Instance

WebAssembly.LinkError

WebAssembly.Memory

WebAssembly.Module

WebAssembly.RuntimeError

WebAssembly.Table

WebAssembly.GlobalDescriptor

WebAssembly.MemoryDescriptor

WebAssembly.ModuleExportDescriptor

WebAssembly.ModuleImportDescriptor

WebAssembly.TableDescriptor

WebAssembly.WebAssemblyInstantiatedSource

WebAssembly.Exports

WebAssembly.ExportValue

WebAssembly.ImportExportKind

WebAssembly.Imports

WebAssembly.ImportValue

WebAssembly.ModuleImports

WebAssembly.TableKind

WebAssembly.ValueType

WebAssembly.compile

WebAssembly.compileStreaming

WebAssembly.instantiate

WebAssembly.instantiateStreaming

WebAssembly.validate

Web Sockets

Deno.UpgradeWebSocketOptions

Deno.WebSocketUpgrade

Deno.upgradeWebSocket

WebSockets

WebSocketCloseInfo

WebSocketConnection

WebSocketEventMap

WebSocketStream

WebSocketStreamOptions

Workers

AbstractWorkerEventMap

class Deno.errors.NotSupported

extends Error

Raised when the underlying Deno API is asked to perform a function that is not currently supported.