Node APIs

Deno provides polyfills for a number of built-in Node.js modules and globals.

Node compatibility is an ongoing project - help us identify gaps and let us know which modules you need by opening an issue on GitHub.

Fully supported modules (22/44)

node:crypto

Certificate: The methods are non-functional stubs.

generateKeyPair: The x448 option is not supported.

generatePrime: The safe, add and rem option is not supported.

KeyObject: The following are non-functional stubs:

from
symmetricKeySize
equals

publicDecrypt: This symbol is a non-functional stub.

secureHeapUsed: This symbol is a non-functional stub.

setEngine: This symbol is a non-functional stub.

ECDH: The convertKey method is a non-functional sub.

Sign: The sign and verify methods are not supported with non BinaryLike input.

node:fs

writeFile: Missing utf16le, latin1 and ucs2 encoding.

writeFileSync: Missing utf16le, latin1 and ucs2 encoding.

node:fs/promises

lchmod: The lchmod implementation is a not implemented.

node:module

Module: The register method is a non-functional stub.

node:sqlite

This module has been added in Deno v2.2.

Partially supported modules (16/44)

node:async_hooks

AsyncResource: The AsyncResource implementation is a non-functional stub.

executionAsyncId: The executionAsyncId implementation is a non-functional stub.

createHook: The createHook implementation is a non-functional stub.

node:dgram

Socket: The following methods are non-functional stubs:

addMembership
addSourceSpecificMembership
dropMembership
dropSourceSpecificMembership
setBroadcast
setMulticastInterface
setMulticastLoopback
setMulticastTtl
setTtl

node:dns

resolve: The ttl option is not supported.

resolve4: The ttl option is not supported.

resolve6: The ttl option is not supported.

resolveCname: The ttl option is not supported.

resolveCaa: The ttl option is not supported.

resolveMx: The ttl option is not supported.

resolveNaptr: The ttl option is not supported.

resolveNs: The ttl option is not supported.

resolvePtr: The ttl option is not supported.

resolveSoa: The ttl option is not supported.

resolveSrv: The ttl option is not supported.

resolveTxt: The ttl option is not supported.

resolveAny: The ttl option is not supported.

node:http

RequestOptions: Option createConnection is not supported.

ClientRequestArgs: Option createConnection is not supported.

ClientRequest: Constructor option createConnection is not supported.

request: Constructor option createConnection is not supported.

get: Constructor option createConnection is not supported.

node:http2

Http2Session: The following methods are non-functional stubs:

setLocalWindowSize
ping
localSettings
remoteSettings
settings
ref
unref

ServerHttp2Session: All methods are non-functional stubs.

Http2Stream: The following methods are non-functional stubs:

aborted
bufferSize
endAfterHeaders
id
pending
priority
rstCode
sentHeaders
sentInfoHeaders
sentTrailers
state

ClientHttp2Stream: All methods are non-functional stubs.

getDefaultSettings: This function is a non-functional stub.

getPackedSettings: This function is a non-functional stub.

getUnpackedSettings: This function is a non-functional stub.

node:https

Server: The cert and key options do not support an array input.

node:inspector

console is supported. Other APIs are non-functional stubs.

node:net

Socket: The fd option is not supported.

node:perf_hooks

performance: The eventLoopUtilization method is a non-functional stub. The timerify method is not implemented.

monitorEventLoopDelay: This symbol is not implemented.

node:process

The multipleResolves and worker events are not supported.

node:tls

createSecurePair: This symbol is currently not supported.

node:util

transferableAbortSignal: This symbol is currently not supported.

transferableAbortController: This symbol is currently not supported.

MIMEParams: This symbol is currently not supported.

MIMEType: This symbol is currently not supported.

getSystemErrorMap: This symbol is currently not supported.

node:v8

cachedDataVersionTag and getHeapStatistics, serialize and deserialize are supported. setFlagsFromStrings is a noop. Other APIs are not supported and will throw and error.

setFlagsFromStrings: This function is a noop.

node:vm

measureMemory: This is a non-functional stub.

compile: The importModuleDynamically parameter is not supported.

createContext: The importModuleDynamically parameter is not supported.

Script: The importModuleDynamically parameter is not supported. The runInContext method does not support break on SIGINT.

node:worker_threads

parentPort: The emit method is not supported. The removeAllListeners method is not supported.

markAsUntransferable: This symbol is not supported.

moveMessagePortToContext: This symbol is not supported.

receiveMessageOnPort: This symbol is not supported.

Worker: The getHeapSnapshot method is not supported.

node:zlib

Options: This class is not supported.

BrotliOptions: This class is not supported.

BrotliCompress: This class is not supported.

BrotliDecompress: This class is not supported.

ZlibBase: This class is not supported.

Unsupported modules (6/44)

node:cluster

All exports are non-functional stubs.

All symbols: This symbol is a non-functional stub.

node:domain

All exports are non-functional stubs. This is a deprecated Node module.

All symbols: This symbol is a non-functional stub.

node:repl

All symbols are not supported.

All symbols: This symbol is not supported.

node:sea

All symbols are not supported.

All symbols: This symbol is not supported.

node:trace_events

All exports are non-functional stubs.

All symbols: This symbol is a non-functional stub.

node:wasi

All exports are non-functional stubs.

All symbols: This symbol is a non-functional stub.

Globals

This is the list of Node globals that Deno supports. These globals are only available in the npm package scope. In your own code you can use them by importing them from the relevant node: module.

Global name	Status
`AbortController`	✅
`AbortSignal`	✅
`Blob`	✅
`Buffer`	✅
`ByteLengthQueuingStrategy`	✅
`__dirname`	⚠️ Info
`__filename`	⚠️ Info
`atob`	✅
`BroadcastChannel`	✅
`btoa`	✅
`clearImmediate`	✅
`clearInterval`	✅
`clearTimeout`	✅
`CompressionStream`	✅
`console`	✅
`CountQueuingStrategy`	✅
`Crypto`	✅
`CryptoKey`	✅
`CustomEvent`	✅
`CustomEvent`	✅
`DecompressionStream`	✅
`Event`	✅
`EventTarget`	✅
`exports`	✅
`fetch`	✅
`File`	✅
`FormData`	✅
`global`	✅
`Headers`	✅
`MessageChannel`	✅
`MessageEvent`	✅
`MessagePort`	✅
`module`	✅
`PerformanceEntry`	✅
`PerformanceMark`	✅
`PerformanceMeasure`	✅
`PerformanceObserver`	✅
`PerformanceObserverEntryList`	❌
`PerformanceResourceTiming`	❌
`performance`	✅
`process`	✅
`queueMicrotask`	✅
`ReadableByteStreamController`	✅
`ReadableStream`	✅
`ReadableStreamBYOBReader`	✅
`ReadableStreamBYOBRequest`	✅
`ReadableStreamDefaultController`	✅
`ReadableStreamDefaultReader`	✅
`require`	✅
`Response`	✅
`Request`	✅
`setImmediate`	✅
`setInterval`	✅
`setTimeout`	✅
`structuredClone`	✅
`structuredClone`	✅
`SubtleCrypto`	✅
`DOMException`	✅
`TextDecoder`	✅
`TextDecoderStream`	✅
`TextEncoder`	✅
`TextEncoderStream`	✅
`TransformStream`	✅
`TransformStreamDefaultController`	✅
`URL`	✅
`URLSearchParams`	✅
`URLSearchParams`	✅
`WebAssembly`	✅
`WritableStream`	✅
`WritableStreamDefaultController`	✅
`WritableStreamDefaultWriter`	✅

`dirname` and `filename`

__dirname and __filename are CommonJS globals. They are available inside CommonJS modules in the npm package scope, but they are not defined in ES modules. In your own ES modules use import.meta.dirname and import.meta.filename instead, which provide the same values for the current module.

Module notes

node:worker_threads

Deno 2.7 significantly improved node:worker_threads compatibility:

stdout and stderr streams are forwarded correctly from workers to the parent process.
worker.terminate() now resolves with the correct exit code.
workerData, execArgv, and threadName options are supported.
worker.performance.eventLoopUtilization() and worker.cpuUsage() are implemented.
BroadcastChannel from worker threads is properly ref'd/unref'd.

node:child_process

Deno 2.7 improved node:child_process compatibility:

stdio streams (stdin, stdout, stderr) are exposed as Socket instances, matching Node.js behavior.
Shell redirection (>, <, >>) works in exec() and execSync().
fork() accepts a URL as the module path.
timeout and killSignal options are supported in exec() and spawn().
NODE_OPTIONS environment variable is respected for fork()'d processes.

node:zlib

Deno 2.7 added Zstd compression support to node:zlib:

import zlib from "node:zlib";
import { promisify } from "node:util";

const compress = promisify(zlib.zstdCompress);
const decompress = promisify(zlib.zstdDecompress);

const compressed = await compress(Buffer.from("Hello, Deno!"));
const result = await decompress(compressed);
console.log(result.toString()); // "Hello, Deno!"

The synchronous variants zlib.zstdCompressSync() and zlib.zstdDecompressSync() are also available.

node:sqlite

Deno 2.7 added several new APIs to node:sqlite:

DatabaseSync.setAuthorizer(callback) — registers a callback invoked for every SQL operation, enabling fine-grained access control over which tables and operations are permitted:

import { constants, DatabaseSync } from "node:sqlite";

const db = new DatabaseSync(":memory:");
db.exec("CREATE TABLE users (id INTEGER PRIMARY KEY, name TEXT)");

// Allow reads, deny everything else
db.setAuthorizer((_action, _table) => {
  return constants.SQLITE_OK;
});

DatabaseSync.enableDefensive(enabled) — enables or disables defensive mode, which prevents potentially dangerous database operations such as schema modifications at runtime.
DatabaseSync.createTagStore() — creates a prepared-statement cache that maps SQL strings to compiled statements for efficient repeated execution.

Node test results

If you're interested in a more detailed view of compatibility on a per-test-case basis, you can find a list of both passing and failing Node.js test cases on this page.

Last updated on July 30, 2026

Node APIs

Fully supported modules (22/44)

Partially supported modules (16/44)

Unsupported modules (6/44)

Globals

__dirname and __filename

Module notes

node:worker_threads

node:child_process

node:zlib

node:sqlite

Node test results

`dirname` and `filename`