Node API Compatibility List

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.

Built-in modules

Module	Support Level	Notes
`node:assert`	✅ Full
`node:assert/strict`	✅ Full
`node:async_hooks`	ℹ️ Partial	`AsyncLocalStorage` is supported.`AsyncResource`,`executionAsyncId`, and`createHook` are non-functional stubs.
`node:buffer`	✅ Full
`node:child_process`	ℹ️ Partial	The `ipc` and `overlapped` stdio options are missing. Passing file descriptors by an integer value is missing.
`node:cluster`	❌ Missing	All exports are non-functional stubs.
`node:console`	✅ Full
`node:crypto`	ℹ️ Partial	Missing `Certificate` class,`crypto.Cipheriv.prototype.setAutoPadding`,`crypto.Decipheriv.prototype.setAutoPadding`,`crypto.getCipherInfo`, `crypto.publicDecrypt`,`crypto.ECDH.prototype.convertKey`,`crypto.diffieHellman`, `x448` option for`generateKeyPair`, `crypto.KeyObject`,`safe`, `add` and `rem` options for`generatePrime`, `crypto.Sign.prototype.sign` and`crypto.Verify.prototype.verify` with non `BinaryLike`input, `crypto.secureHeapUsed`, `crypto.setEngine`, legacy methods of `crypto.X509Certificate`.
`node:dgram`	ℹ️ Full
`node:diagnostics_channel`	✅ Full
`node:dns`	ℹ️ Partial	Missing `dns.resolve*` with `ttl` option.
`node:domain`	❌ Missing	All exports are non-functional stubs.
`node:events`	✅ Full
`node:fs`	ℹ️ Partial	Missing `utf16le`, `latin1` and `ucs2`encoding for `fs.writeFile` and`fs.writeFileSync`. Missing `Dirent.isBlockDevice`,`Dirent.isCharacterDevice`,`Dirent.isFIFO`, `Dirent.isSocket`,`FSWatcher.ref`, `FSWatcher.unref`.
`node:fs/promises`	ℹ️ Partial	Missing `lchmod`, `lchown`, `lutimes`.
`node:http`	ℹ️ Partial	`createConnection` option is currently not supported.
`node:http2`	ℹ️ Partial	Partially supported, major work in progress to enable `grpc-js`.
`node:https`	ℹ️ Partial	Missing `https.Server.opts.cert` and`https.Server.opts.key` array type.
`node:inspector`	ℹ️ Partial	`console` is supported. Other APIs are stubs and will throw an error. Due to security implications the Deno team does not plan to polyfill these APIs.
`node:module`	✅ Full
`node:net`	ℹ️ Partial	Missing `net.Socket.prototype.constructor` with `fd`option.
`node:os`	✅ Full
`node:path`	✅ Full
`node:path/posix`	✅ Full
`node:path/win32`	✅ Full
`node:perf_hooks`	ℹ️ Partial	Missing `perf_hooks.eventLoopUtilization`,`perf_hooks.timerify`,`perf_hooks.monitorEventLoopDelay`.
`node:process`	ℹ️ Partial	Missing `disconnect`, `message`,`multipleResolves`, `rejectionHandled` and`worker` events.
`node:punycode`	✅ Full
`node:querystring`	✅ Full
`node:readline`	✅ Full
`node:repl`	ℹ️ Partial	`builtinModules` and `_builtinLibs` are supported. Missing `REPLServer.prototype.constructor` and`start()`.
`node:stream`	✅ Full
`node:stream/consumers`	✅ Full
`node:stream/promises`	✅ Full
`node:stream/web`	✅ Full
`node:string_decoder`	ℹ️ Partial	Missing decoding of `ascii`, `latin1` and`utf16le` decoding options.
`node:sys`	✅ Full	See `node:util`.
`node:test`	ℹ️ Partial	Currently only `test` API is supported.
`node:timers`	✅ Full
`node:timers/promises`	✅ Full
`node:tls`	ℹ️ Partial	Missing `createSecurePair`.
`node:trace_events`	❌ Missing	All exports are non-functional stubs.
`node:tty`	ℹ️ Partial	Missing `ReadStream` and `WriteStream`implementation.
`node:url`	✅ Full
`node:util`	✅ Full
`node:util/types`	✅ Full
`node:v8`	ℹ️ Partial	`cachedDataVersionTag` and `getHeapStatistics` are supported. `setFlagsFromStrings` is a noop. Other APIs are not supported and will throw and error. The other APIs could be polyfilled, but due inherent lack of format stability between the V8 versions, the Deno team is considering requiring a special flag to use them.
`node:vm`	ℹ️ Partial	`runInThisContext` is supported. Other APIs are not polyfilled and will throw and error.
`node:wasi`	❌ Missing	All exports are non-functional stubs.
`node:worker_threads`	ℹ️ Partial	Missing `parentPort.emit`,`parentPort.removeAllListeners`,`markAsUntransferable`, `moveMessagePortToContext`,`receiveMessageOnPort`,`Worker.prototype.getHeapSnapshot`.
`node:zlib`	ℹ️ Partial	Missing `Options.prototype.constructor`,`BrotliOptions.prototype.constructor`,`BrotliDecompress.prototype.constructor`,`ZlibBase.prototype.constructor`.

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`	✅
`__filename`	✅
`atob`	✅
`BroadcastChannel`	✅
`btoa`	✅
`clearImmediate`	✅
`clearInterval`	✅
`clearTimeout`	✅
`CompressionStream`	✅
`console`	✅
`CountQueuingStrategy`	✅
`Crypto`	✅
`CryptoKey`	✅
`CustomEvent`	✅
`CustomEvent`	✅
`DecompressionStream`	✅
`Event`	✅
`EventTarget`	✅
`exports`	✅
`fetch`	✅
`fetch`	✅
`File`	✅
`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`	✅

Node API Compatibility List

Built-in modules​

Globals​

Built-in modules

Globals