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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 module support Jump to heading
node:async_hooks
ℹ️
AsyncLocalStorage is supported. AsyncResource,{" "}
executionAsyncId, and createHook are
non-functional stubs.
node:child_process
ℹ️
The ipc and overlapped stdio options are missing.
Passing file descriptors by an integer value is missing.
node:crypto
ℹ️
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
Some dgram.Socket instance methods are non-functional stubs:
addMembershipaddSourceSpecificMembershipdropMembershipdropSourceSpecificMembershipsetBroadcastsetMulticastInterfacesetMulticastLoopbacksetMulticastTtlsetTtlrefunref
node:fs
ℹ️
node:fs
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
Missing lchmod, lchown, lutimes.
node:https
ℹ️
Missing https.Server.opts.cert and{" "}
https.Server.opts.key array type.
node:inspector
ℹ️
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:perf_hooks
ℹ️
Missing perf_hooks.eventLoopUtilization,{" "}
perf_hooks.timerify,{" "}
perf_hooks.monitorEventLoopDelay.
node:repl
ℹ️
builtinModules and _builtinLibs are supported.
Missing REPLServer.prototype.constructor and{" "}
start().
node:string_decoder
ℹ️
Missing decoding of ascii, latin1 and{" "}
utf16le decoding options.
node:util
ℹ️
Missing aborted, transferableAbortSignal, transferableAbortController, MIMEParams, MIMEType, getSystemErrorMap, and debug.
node:v8
ℹ️
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
runInThisContext is supported. Other APIs are not polyfilled
and will throw and error.
node:worker_threads
ℹ️
Missing parentPort.emit,{" "}
parentPort.removeAllListeners,{" "}
markAsUntransferable, moveMessagePortToContext,{" "}
receiveMessageOnPort,{" "}
Worker.prototype.getHeapSnapshot.
node:zlib
ℹ️
Missing Options.prototype.constructor,{" "}
BrotliOptions.prototype.constructor,{" "}
BrotliDecompress.prototype.constructor,{" "}
ZlibBase.prototype.constructor.
Globals Jump to heading
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.