Node.js v8.12.0 Documentation

Table of Contents

• About this Documentation
  • Contributing
  • Stability Index
  • JSON Output
  • Syscalls and man pages
• Usage
  • Example
• Assert
  • assert(value[, message])
  • assert.deepEqual(actual, expected[, message])
  • assert.deepStrictEqual(actual, expected[, message])
  • assert.doesNotThrow(block[, error][, message])
  • assert.equal(actual, expected[, message])
  • assert.fail(message)
  • assert.fail(actual, expected[, message[, operator[, stackStartFunction]]])
  • assert.ifError(value)
  • assert.notDeepEqual(actual, expected[, message])
  • assert.notDeepStrictEqual(actual, expected[, message])
  • assert.notEqual(actual, expected[, message])
  • assert.notStrictEqual(actual, expected[, message])
  • assert.ok(value[, message])
  • assert.strictEqual(actual, expected[, message])
  • assert.throws(block[, error][, message])
  • Caveats
• Async Hooks
  • Terminology
  • Public API
    • Overview
      • async_hooks.createHook(callbacks)
        • Error Handling
        • Printing in AsyncHooks callbacks
      • asyncHook.enable()
      • asyncHook.disable()
      • Hook Callbacks
        • init(asyncId, type, triggerAsyncId, resource)
          • type
          • triggerId
          • resource
          • Asynchronous context example
        • before(asyncId)
        • after(asyncId)
        • destroy(asyncId)
        • promiseResolve(asyncId)
      • async_hooks.executionAsyncId()
      • async_hooks.triggerAsyncId()
  • Promise execution tracking
  • JavaScript Embedder API
    • class AsyncResource()
      • AsyncResource(type[, options])
      • asyncResource.runInAsyncScope(fn[, thisArg, ...args])
      • asyncResource.emitBefore()
      • asyncResource.emitAfter()
      • asyncResource.emitDestroy()
      • asyncResource.asyncId()
      • asyncResource.triggerAsyncId()
• Buffer
  • Buffer.from(), Buffer.alloc(), and Buffer.allocUnsafe()
    • The --zero-fill-buffers command line option
    • What makes Buffer.allocUnsafe() and Buffer.allocUnsafeSlow() "unsafe"?
  • Buffers and Character Encodings
  • Buffers and TypedArray
  • Buffers and iteration
  • Class: Buffer
    • new Buffer(array)
    • new Buffer(arrayBuffer[, byteOffset[, length]])
    • new Buffer(buffer)
    • new Buffer(size)
    • new Buffer(string[, encoding])
    • Class Method: Buffer.alloc(size[, fill[, encoding]])
    • Class Method: Buffer.allocUnsafe(size)
    • Class Method: Buffer.allocUnsafeSlow(size)
    • Class Method: Buffer.byteLength(string[, encoding])
    • Class Method: Buffer.compare(buf1, buf2)
    • Class Method: Buffer.concat(list[, totalLength])
    • Class Method: Buffer.from(array)
    • Class Method: Buffer.from(arrayBuffer[, byteOffset[, length]])
    • Class Method: Buffer.from(buffer)
    • Class Method: Buffer.from(string[, encoding])
    • Class Method: Buffer.from(object[, offsetOrEncoding[, length]])
    • Class Method: Buffer.isBuffer(obj)
    • Class Method: Buffer.isEncoding(encoding)
    • Class Property: Buffer.poolSize
    • buf[index]
    • buf.buffer
    • buf.compare(target[, targetStart[, targetEnd[, sourceStart[, sourceEnd]]]])
    • buf.copy(target[, targetStart[, sourceStart[, sourceEnd]]])
    • buf.entries()
    • buf.equals(otherBuffer)
    • buf.fill(value[, offset[, end]][, encoding])
    • buf.includes(value[, byteOffset][, encoding])
    • buf.indexOf(value[, byteOffset][, encoding])
    • buf.keys()
    • buf.lastIndexOf(value[, byteOffset][, encoding])
    • buf.length
    • buf.parent
    • buf.readDoubleBE(offset[, noAssert])
    • buf.readDoubleLE(offset[, noAssert])
    • buf.readFloatBE(offset[, noAssert])
    • buf.readFloatLE(offset[, noAssert])
    • buf.readInt8(offset[, noAssert])
    • buf.readInt16BE(offset[, noAssert])
    • buf.readInt16LE(offset[, noAssert])
    • buf.readInt32BE(offset[, noAssert])
    • buf.readInt32LE(offset[, noAssert])
    • buf.readIntBE(offset, byteLength[, noAssert])
    • buf.readIntLE(offset, byteLength[, noAssert])
    • buf.readUInt8(offset[, noAssert])
    • buf.readUInt16BE(offset[, noAssert])
    • buf.readUInt16LE(offset[, noAssert])
    • buf.readUInt32BE(offset[, noAssert])
    • buf.readUInt32LE(offset[, noAssert])
    • buf.readUIntBE(offset, byteLength[, noAssert])
    • buf.readUIntLE(offset, byteLength[, noAssert])
    • buf.slice([start[, end]])
    • buf.swap16()
    • buf.swap32()
    • buf.swap64()
    • buf.toJSON()
    • buf.toString([encoding[, start[, end]]])
    • buf.values()
    • buf.write(string[, offset[, length]][, encoding])
    • buf.writeDoubleBE(value, offset[, noAssert])
    • buf.writeDoubleLE(value, offset[, noAssert])
    • buf.writeFloatBE(value, offset[, noAssert])
    • buf.writeFloatLE(value, offset[, noAssert])
    • buf.writeInt8(value, offset[, noAssert])
    • buf.writeInt16BE(value, offset[, noAssert])
    • buf.writeInt16LE(value, offset[, noAssert])
    • buf.writeInt32BE(value, offset[, noAssert])
    • buf.writeInt32LE(value, offset[, noAssert])
    • buf.writeIntBE(value, offset, byteLength[, noAssert])
    • buf.writeIntLE(value, offset, byteLength[, noAssert])
    • buf.writeUInt8(value, offset[, noAssert])
    • buf.writeUInt16BE(value, offset[, noAssert])
    • buf.writeUInt16LE(value, offset[, noAssert])
    • buf.writeUInt32BE(value, offset[, noAssert])
    • buf.writeUInt32LE(value, offset[, noAssert])
    • buf.writeUIntBE(value, offset, byteLength[, noAssert])
    • buf.writeUIntLE(value, offset, byteLength[, noAssert])
  • buffer.INSPECT_MAX_BYTES
  • buffer.kMaxLength
  • buffer.transcode(source, fromEnc, toEnc)
  • Class: SlowBuffer
    • new SlowBuffer(size)
  • Buffer Constants
    • buffer.constants.MAX_LENGTH
    • buffer.constants.MAX_STRING_LENGTH
• C++ Addons
  • Hello world
    • Building
    • Linking to Node.js' own dependencies
    • Loading Addons using require()
  • Native Abstractions for Node.js
  • N-API
  • Addon examples
    • Function arguments
    • Callbacks
    • Object factory
    • Function factory
    • Wrapping C++ objects
    • Factory of wrapped objects
    • Passing wrapped objects around
    • AtExit hooks
      • void AtExit(callback, args)
• N-API
  • Basic N-API Data Types
    • napi_status
    • napi_extended_error_info
    • napi_env
    • napi_value
    • N-API Memory Management types
      • napi_handle_scope
      • napi_escapable_handle_scope
      • napi_ref
    • N-API Callback types
      • napi_callback_info
      • napi_callback
      • napi_finalize
      • napi_async_execute_callback
      • napi_async_complete_callback
  • Error Handling
    • Return values
      • napi_get_last_error_info
    • Exceptions
      • napi_throw
      • napi_throw_error
      • napi_throw_type_error
      • napi_throw_range_error
      • napi_is_error
      • napi_create_error
      • napi_create_type_error
      • napi_create_range_error
      • napi_get_and_clear_last_exception
      • napi_is_exception_pending
      • napi_fatal_exception
    • Fatal Errors
      • napi_fatal_error
  • Object Lifetime management
    • Making handle lifespan shorter than that of the native method
      • napi_open_handle_scope
      • napi_close_handle_scope
      • napi_open_escapable_handle_scope
      • napi_close_escapable_handle_scope
      • napi_escape_handle
    • References to objects with a lifespan longer than that of the native method
      • napi_create_reference
      • napi_delete_reference
      • napi_reference_ref
      • napi_reference_unref
      • napi_get_reference_value
    • Cleanup on exit of the current Node.js instance
      • napi_add_env_cleanup_hook
      • napi_remove_env_cleanup_hook
  • Module registration
  • Working with JavaScript Values
    • Enum types
      • napi_valuetype
      • napi_typedarray_type
    • Object Creation Functions
      • napi_create_array
      • napi_create_array_with_length
      • napi_create_arraybuffer
      • napi_create_buffer
      • napi_create_buffer_copy
      • napi_create_external
      • napi_create_external_arraybuffer
      • napi_create_external_buffer
      • napi_create_function
      • napi_create_object
      • napi_create_symbol
      • napi_create_typedarray
      • napi_create_dataview
    • Functions to convert from C types to N-API
      • napi_create_int32
      • napi_create_uint32
      • napi_create_int64
      • napi_create_double
      • napi_create_string_latin1
      • napi_create_string_utf16
      • napi_create_string_utf8
    • Functions to convert from N-API to C types
      • napi_get_array_length
      • napi_get_arraybuffer_info
      • napi_get_buffer_info
      • napi_get_prototype
      • napi_get_typedarray_info
      • napi_get_dataview_info
      • napi_get_value_bool
      • napi_get_value_double
      • napi_get_value_external
      • napi_get_value_int32
      • napi_get_value_int64
      • napi_get_value_string_latin1
      • napi_get_value_string_utf8
      • napi_get_value_string_utf16
      • napi_get_value_uint32
    • Functions to get global instances
      • napi_get_boolean
      • napi_get_global
      • napi_get_null
      • napi_get_undefined
  • Working with JavaScript Values - Abstract Operations
    • napi_coerce_to_bool
    • napi_coerce_to_number
    • napi_coerce_to_object
    • napi_coerce_to_string
    • napi_typeof
    • napi_instanceof
    • napi_is_array
    • napi_is_arraybuffer
    • napi_is_buffer
    • napi_is_error
    • napi_is_typedarray
    • napi_is_dataview
    • napi_strict_equals
  • Working with JavaScript Properties
    • Structures
      • napi_property_attributes
      • napi_property_descriptor
    • Functions
      • napi_get_property_names
      • napi_set_property
      • napi_get_property
      • napi_has_property
      • napi_delete_property
      • napi_has_own_property
      • napi_set_named_property
      • napi_get_named_property
      • napi_has_named_property
      • napi_set_element
      • napi_get_element
      • napi_has_element
      • napi_delete_element
      • napi_define_properties
  • Working with JavaScript Functions
    • napi_call_function
    • napi_create_function
    • napi_get_cb_info
    • napi_get_new_target
    • napi_new_instance
  • Object Wrap
    • napi_define_class
    • napi_wrap
    • napi_unwrap
    • napi_remove_wrap
  • Simple Asynchronous Operations
    • napi_create_async_work
    • napi_delete_async_work
    • napi_queue_async_work
    • napi_cancel_async_work
  • Custom Asynchronous Operations
    • napi_async_init
    • napi_async_destroy
    • napi_make_callback
    • napi_open_callback_scope
    • napi_close_callback_scope
  • Version Management
    • napi_get_node_version
    • napi_get_version
  • Memory Management
    • napi_adjust_external_memory
  • Promises
    • napi_create_promise
    • napi_resolve_deferred
    • napi_reject_deferred
    • napi_is_promise
  • Script execution
    • napi_run_script
  • libuv event loop
    • napi_get_uv_event_loop
• Child Process
  • Asynchronous Process Creation
    • Spawning .bat and .cmd files on Windows
    • child_process.exec(command[, options][, callback])
    • child_process.execFile(file[, args][, options][, callback])
    • child_process.fork(modulePath[, args][, options])
    • child_process.spawn(command[, args][, options])
      • options.detached
      • options.stdio
  • Synchronous Process Creation
    • child_process.execFileSync(file[, args][, options])
    • child_process.execSync(command[, options])
    • child_process.spawnSync(command[, args][, options])
  • Class: ChildProcess
    • Event: 'close'
    • Event: 'disconnect'
    • Event: 'error'
    • Event: 'exit'
    • Event: 'message'
    • subprocess.channel
    • subprocess.connected
    • subprocess.disconnect()
    • subprocess.kill([signal])
    • subprocess.killed
    • subprocess.pid
    • subprocess.send(message[, sendHandle[, options]][, callback])
      • Example: sending a server object
      • Example: sending a socket object
    • subprocess.stderr
    • subprocess.stdin
    • subprocess.stdio
    • subprocess.stdout
  • maxBuffer and Unicode
  • Shell Requirements
  • Default Windows Shell
• Cluster
  • How It Works
  • Class: Worker
    • Event: 'disconnect'
    • Event: 'error'
    • Event: 'exit'
    • Event: 'listening'
    • Event: 'message'
    • Event: 'online'
    • worker.disconnect()
    • worker.exitedAfterDisconnect
    • worker.id
    • worker.isConnected()
    • worker.isDead()
    • worker.kill([signal='SIGTERM'])
    • worker.process
    • worker.send(message[, sendHandle][, callback])
    • worker.suicide
  • Event: 'disconnect'
  • Event: 'exit'
  • Event: 'fork'
  • Event: 'listening'
  • Event: 'message'
  • Event: 'online'
  • Event: 'setup'
  • cluster.disconnect([callback])
  • cluster.fork([env])
  • cluster.isMaster
  • cluster.isWorker
  • cluster.schedulingPolicy
  • cluster.settings
  • cluster.setupMaster([settings])
  • cluster.worker
  • cluster.workers
• Command Line Options
  • Synopsis
  • Options
    • -v, --version
    • -h, --help
    • -e, --eval "script"
    • -p, --print "script"
    • -c, --check
    • -i, --interactive
    • -r, --require module
    • --inspect[=[host:]port]
    • --inspect-brk[=[host:]port]
    • --inspect-port=[host:]port
    • --no-deprecation
    • --trace-deprecation
    • --throw-deprecation
    • --pending-deprecation
    • --no-warnings
    • --expose-http2
    • --abort-on-uncaught-exception
    • --trace-warnings
    • --redirect-warnings=file
    • --trace-sync-io
    • --force-async-hooks-checks
    • --trace-events-enabled
    • --trace-event-categories
    • --trace-event-file-pattern
    • --zero-fill-buffers
    • --preserve-symlinks
    • --track-heap-objects
    • --prof-process
    • --v8-options
    • --tls-cipher-list=list
    • --enable-fips
    • --force-fips
    • --openssl-config=file
    • --use-openssl-ca, --use-bundled-ca
    • --icu-data-dir=file
    • -
    • --
  • Environment Variables
    • NODE_DEBUG=module[,…]
    • NODE_PATH=path[:…]
    • NODE_DISABLE_COLORS=1
    • NODE_ICU_DATA=file
    • NODE_NO_WARNINGS=1
    • NODE_NO_HTTP2=1
    • NODE_OPTIONS=options...
    • NODE_PENDING_DEPRECATION=1
    • NODE_PRESERVE_SYMLINKS=1
    • NODE_REPL_HISTORY=file
    • NODE_EXTRA_CA_CERTS=file
    • OPENSSL_CONF=file
    • SSL_CERT_DIR=dir
    • SSL_CERT_FILE=file
    • NODE_REDIRECT_WARNINGS=file
    • UV_THREADPOOL_SIZE=size
• Console
  • Class: Console
    • new Console(stdout[, stderr])
    • console.assert(value[, message][, ...args])
    • console.clear()
    • console.count([label])
    • console.countReset([label='default'])
    • console.debug(data[, ...args])
    • console.dir(obj[, options])
    • console.error([data][, ...args])
    • console.group([...label])
    • console.groupCollapsed()
    • console.groupEnd()
    • console.info([data][, ...args])
    • console.log([data][, ...args])
    • console.time(label)
    • console.timeEnd(label)
    • console.trace([message][, ...args])
    • console.warn([data][, ...args])
• Crypto
  • Determining if crypto support is unavailable
  • Class: Certificate
    • new crypto.Certificate()
    • certificate.exportChallenge(spkac)
    • certificate.exportPublicKey(spkac)
    • certificate.verifySpkac(spkac)
  • Class: Cipher
    • cipher.final([outputEncoding])
    • cipher.setAAD(buffer)
    • cipher.getAuthTag()
    • cipher.setAutoPadding([autoPadding])
    • cipher.update(data[, inputEncoding][, outputEncoding])
  • Class: Decipher
    • decipher.final([outputEncoding])
    • decipher.setAAD(buffer)
    • decipher.setAuthTag(buffer)
    • decipher.setAutoPadding([autoPadding])
    • decipher.update(data[, inputEncoding][, outputEncoding])
  • Class: DiffieHellman
    • diffieHellman.computeSecret(otherPublicKey[, inputEncoding][, outputEncoding])
    • diffieHellman.generateKeys([encoding])
    • diffieHellman.getGenerator([encoding])
    • diffieHellman.getPrime([encoding])
    • diffieHellman.getPrivateKey([encoding])
    • diffieHellman.getPublicKey([encoding])
    • diffieHellman.setPrivateKey(privateKey[, encoding])
    • diffieHellman.setPublicKey(publicKey[, encoding])
    • diffieHellman.verifyError
  • Class: ECDH
    • ecdh.computeSecret(otherPublicKey[, inputEncoding][, outputEncoding])
    • ecdh.generateKeys([encoding[, format]])
    • ecdh.getPrivateKey([encoding])
    • ecdh.getPublicKey([encoding][, format])
    • ecdh.setPrivateKey(privateKey[, encoding])
    • ecdh.setPublicKey(publicKey[, encoding])
  • Class: Hash
    • hash.digest([encoding])
    • hash.update(data[, inputEncoding])
  • Class: Hmac
    • hmac.digest([encoding])
    • hmac.update(data[, inputEncoding])
  • Class: Sign
    • sign.sign(privateKey[, outputFormat])
    • sign.update(data[, inputEncoding])
  • Class: Verify
    • verify.update(data[, inputEncoding])
    • verify.verify(object, signature[, signatureFormat])
  • crypto module methods and properties
    • crypto.constants
    • crypto.DEFAULT_ENCODING
    • crypto.fips
    • crypto.createCipher(algorithm, password[, options])
    • crypto.createCipheriv(algorithm, key, iv[, options])
    • crypto.createCredentials(details)
    • crypto.createDecipher(algorithm, password[, options])
    • crypto.createDecipheriv(algorithm, key, iv[, options])
    • crypto.createDiffieHellman(prime[, primeEncoding][, generator][, generatorEncoding])
    • crypto.createDiffieHellman(primeLength[, generator])
    • crypto.createECDH(curveName)
    • crypto.createHash(algorithm[, options])
    • crypto.createHmac(algorithm, key[, options])
    • crypto.createSign(algorithm[, options])
    • crypto.createVerify(algorithm[, options])
    • crypto.getCiphers()
    • crypto.getCurves()
    • crypto.getDiffieHellman(groupName)
    • crypto.getHashes()
    • crypto.pbkdf2(password, salt, iterations, keylen, digest, callback)
    • crypto.pbkdf2Sync(password, salt, iterations, keylen, digest)
    • crypto.privateDecrypt(privateKey, buffer)
    • crypto.privateEncrypt(privateKey, buffer)
    • crypto.publicDecrypt(key, buffer)
    • crypto.publicEncrypt(key, buffer)
    • crypto.randomBytes(size[, callback])
    • crypto.randomFillSync(buffer[, offset][, size])
    • crypto.randomFill(buffer[, offset][, size], callback)
    • crypto.setEngine(engine[, flags])
    • crypto.timingSafeEqual(a, b)
  • Notes
    • Legacy Streams API (pre Node.js v0.10)
    • Recent ECDH Changes
    • Support for weak or compromised algorithms
  • Crypto Constants
    • OpenSSL Options
    • OpenSSL Engine Constants
    • Other OpenSSL Constants
    • Node.js Crypto Constants
• Debugger
  • Watchers
  • Command reference
    • Stepping
    • Breakpoints
    • Information
    • Execution control
    • Various
  • Advanced Usage
    • V8 Inspector Integration for Node.js
• Deprecated APIs
  • Un-deprecation
  • List of Deprecated APIs
    • DEP0001: http.OutgoingMessage.prototype.flush
    • DEP0002: require('_linklist')
    • DEP0003: _writableState.buffer
    • DEP0004: CryptoStream.prototype.readyState
    • DEP0005: Buffer() constructor
    • DEP0006: child_process options.customFds
    • DEP0007: cluster worker.suicide
    • DEP0008: require('constants')
    • DEP0009: crypto.pbkdf2 without digest
    • DEP0010: crypto.createCredentials
    • DEP0011: crypto.Credentials
    • DEP0012: Domain.dispose
    • DEP0013: fs asynchronous function without callback
    • DEP0014: fs.read legacy String interface
    • DEP0015: fs.readSync legacy String interface
    • DEP0016: GLOBAL/root
    • DEP0017: Intl.v8BreakIterator
    • DEP0018: Unhandled promise rejections
    • DEP0019: require('.') resolved outside directory
    • DEP0020: Server.connections
    • DEP0021: Server.listenFD
    • DEP0022: os.tmpDir()
    • DEP0023: os.getNetworkInterfaces()
    • DEP0024: REPLServer.prototype.convertToContext()
    • DEP0025: require('sys')
    • DEP0026: util.print()
    • DEP0027: util.puts()
    • DEP0028: util.debug()
    • DEP0029: util.error()
    • DEP0030: SlowBuffer
    • DEP0031: ecdh.setPublicKey()
    • DEP0032: domain module
    • DEP0033: EventEmitter.listenerCount()
    • DEP0034: fs.exists(path, callback)
    • DEP0035: fs.lchmod(path, mode, callback)
    • DEP0036: fs.lchmodSync(path, mode)
    • DEP0037: fs.lchown(path, uid, gid, callback)
    • DEP0038: fs.lchownSync(path, uid, gid)
    • DEP0039: require.extensions
    • DEP0040: punycode module
    • DEP0041: NODE_REPL_HISTORY_FILE environment variable
    • DEP0042: tls.CryptoStream
    • DEP0043: tls.SecurePair
    • DEP0044: util.isArray()
    • DEP0045: util.isBoolean()
    • DEP0046: util.isBuffer()
    • DEP0047: util.isDate()
    • DEP0048: util.isError()
    • DEP0049: util.isFunction()
    • DEP0050: util.isNull()
    • DEP0051: util.isNullOrUndefined()
    • DEP0052: util.isNumber()
    • DEP0053 util.isObject()
    • DEP0054: util.isPrimitive()
    • DEP0055: util.isRegExp()
    • DEP0056: util.isString()
    • DEP0057: util.isSymbol()
    • DEP0058: util.isUndefined()
    • DEP0059: util.log()
    • DEP0060: util._extend()
    • DEP0061: fs.SyncWriteStream
    • DEP0062: node --debug
    • DEP0063: ServerResponse.prototype.writeHeader()
    • DEP0064: tls.createSecurePair()
    • DEP0065: repl.REPL_MODE_MAGIC and NODE_REPL_MODE=magic
    • DEP0066: outgoingMessage._headers, outgoingMessage._headerNames
    • DEP0067: OutgoingMessage.prototype._renderHeaders
    • DEP0068: node debug
    • DEP0069: vm.runInDebugContext(string)
    • DEP0070: async_hooks.currentId()
    • DEP0071: async_hooks.triggerId()
    • DEP0072: async_hooks.AsyncResource.triggerId()
    • DEP0076: tls.parseCertString()
    • DEP0079: Custom inspection function on Objects via .inspect()
    • DEP0085: AsyncHooks Sensitive API
    • DEP0086: Remove runInAsyncIdScope
    • DEP0098: AsyncHooks Embedder AsyncResource.emit<Before,After> APIs
• DNS
  • Class dns.Resolver
    • resolver.cancel()
  • dns.getServers()
  • dns.lookup(hostname[, options], callback)
    • Supported getaddrinfo flags
  • dns.lookupService(address, port, callback)
  • dns.resolve(hostname[, rrtype], callback)
  • dns.resolve4(hostname[, options], callback)
  • dns.resolve6(hostname[, options], callback)
  • dns.resolveCname(hostname, callback)
  • dns.resolveMx(hostname, callback)
  • dns.resolveNaptr(hostname, callback)
  • dns.resolveNs(hostname, callback)
  • dns.resolvePtr(hostname, callback)
  • dns.resolveSoa(hostname, callback)
  • dns.resolveSrv(hostname, callback)
  • dns.resolveTxt(hostname, callback)
  • dns.resolveAny(hostname, callback)
  • dns.reverse(ip, callback)
  • dns.setServers(servers)
  • Error codes
  • Implementation considerations
    • dns.lookup()
    • dns.resolve(), dns.resolve*() and dns.reverse()
• Domain
  • Warning: Don't Ignore Errors!
  • Additions to Error objects
  • Implicit Binding
  • Explicit Binding
  • domain.create()
  • Class: Domain
    • domain.members
    • domain.add(emitter)
    • domain.bind(callback)
      • Example
    • domain.dispose()
    • domain.enter()
    • domain.exit()
    • domain.intercept(callback)
      • Example
    • domain.remove(emitter)
    • domain.run(fn[, ...args])
  • Domains and Promises
• ECMAScript Modules
  • Enabling
  • Features
    • Supported
    • Unsupported
  • Notable differences between import and require
    • No NODE_PATH
    • No require.extensions
    • No require.cache
    • URL based paths
  • Interop with existing modules
  • Loader hooks
    • Resolve hook
    • Dynamic instantiate hook
• Errors
  • Error Propagation and Interception
    • Error-first callbacks
  • Class: Error
    • new Error(message)
    • Error.captureStackTrace(targetObject[, constructorOpt])
    • Error.stackTraceLimit
    • error.code
    • error.message
    • error.stack
  • Class: AssertionError
  • Class: RangeError
  • Class: ReferenceError
  • Class: SyntaxError
  • Class: TypeError
  • Exceptions vs. Errors
  • System Errors
    • Class: System Error
      • error.code
      • error.errno
      • error.syscall
      • error.path
      • error.address
      • error.port
    • Common System Errors
  • Node.js Error Codes
    • ERR_ARG_NOT_ITERABLE
    • ERR_ASYNC_CALLBACK
    • ERR_ASYNC_TYPE
    • ERR_ENCODING_INVALID_ENCODED_DATA
    • ERR_ENCODING_NOT_SUPPORTED
    • ERR_FALSY_VALUE_REJECTION
    • ERR_HTTP_HEADERS_SENT
    • ERR_HTTP_INVALID_CHAR
    • ERR_HTTP_INVALID_STATUS_CODE
    • ERR_HTTP_TRAILER_INVALID
    • ERR_HTTP2_ALREADY_SHUTDOWN
    • ERR_HTTP2_ALTSVC_INVALID_ORIGIN
    • ERR_HTTP2_ALTSVC_LENGTH
    • ERR_HTTP2_CONNECT_AUTHORITY
    • ERR_HTTP2_CONNECT_PATH
    • ERR_HTTP2_CONNECT_SCHEME
    • ERR_HTTP2_FRAME_ERROR
    • ERR_HTTP2_GOAWAY_SESSION
    • ERR_HTTP2_HEADER_REQUIRED
    • ERR_HTTP2_HEADER_SINGLE_VALUE
    • ERR_HTTP2_HEADERS_AFTER_RESPOND
    • ERR_HTTP2_HEADERS_OBJECT
    • ERR_HTTP2_HEADERS_SENT
    • ERR_HTTP2_INFO_HEADERS_AFTER_RESPOND
    • ERR_HTTP2_INFO_STATUS_NOT_ALLOWED
    • ERR_HTTP2_INVALID_CONNECTION_HEADERS
    • ERR_HTTP2_INVALID_HEADER_VALUE
    • ERR_HTTP2_INVALID_INFO_STATUS
    • ERR_HTTP2_INVALID_PACKED_SETTINGS_LENGTH
    • ERR_HTTP2_INVALID_PSEUDOHEADER
    • ERR_HTTP2_INVALID_SESSION
    • ERR_HTTP2_INVALID_SETTING_VALUE
    • ERR_HTTP2_INVALID_STREAM
    • ERR_HTTP2_MAX_PENDING_SETTINGS_ACK
    • ERR_HTTP2_NO_SOCKET_MANIPULATION
    • ERR_HTTP2_OUT_OF_STREAMS
    • ERR_HTTP2_PAYLOAD_FORBIDDEN
    • ERR_HTTP2_PING_CANCEL
    • ERR_HTTP2_PING_LENGTH
    • ERR_HTTP2_PSEUDOHEADER_NOT_ALLOWED
    • ERR_HTTP2_PUSH_DISABLED
    • ERR_HTTP2_SEND_FILE
    • ERR_HTTP2_SESSION_ERROR
    • ERR_HTTP2_SOCKET_BOUND
    • ERR_HTTP2_STATUS_101
    • ERR_HTTP2_STATUS_INVALID
    • ERR_HTTP2_STREAM_CANCEL
    • ERR_HTTP2_STREAM_ERROR
    • ERR_HTTP2_STREAM_SELF_DEPENDENCY
    • ERR_HTTP2_UNSUPPORTED_PROTOCOL
    • ERR_INDEX_OUT_OF_RANGE
    • ERR_INVALID_ARG_TYPE
    • ERR_INVALID_ASYNC_ID
    • ERR_INVALID_CALLBACK
    • ERR_INVALID_FILE_URL_HOST
    • ERR_INVALID_FILE_URL_PATH
    • ERR_INVALID_HANDLE_TYPE
    • ERR_INVALID_OPT_VALUE
    • ERR_INVALID_PERFORMANCE_MARK
    • ERR_INVALID_PROTOCOL
    • ERR_INVALID_SYNC_FORK_INPUT
    • ERR_INVALID_THIS
    • ERR_INVALID_TUPLE
    • ERR_INVALID_URL
    • ERR_INVALID_URL_SCHEME
    • ERR_IPC_CHANNEL_CLOSED
    • ERR_IPC_DISCONNECTED
    • ERR_IPC_ONE_PIPE
    • ERR_IPC_SYNC_FORK
    • ERR_MISSING_ARGS
    • ERR_MISSING_DYNAMIC_INSTANTIATE_HOOK
    • ERR_MISSING_MODULE
    • ERR_MODULE_RESOLUTION_LEGACY
    • ERR_MULTIPLE_CALLBACK
    • ERR_NAPI_CONS_FUNCTION
    • ERR_NAPI_CONS_PROTOTYPE_OBJECT
    • ERR_NAPI_INVALID_DATAVIEW_ARGS
    • ERR_NAPI_INVALID_TYPEDARRAY_ALIGNMENT
    • ERR_NAPI_INVALID_TYPEDARRAY_LENGTH
    • ERR_NO_ICU
    • ERR_SOCKET_ALREADY_BOUND
    • ERR_SOCKET_BAD_PORT
    • ERR_SOCKET_BAD_TYPE
    • ERR_SOCKET_CANNOT_SEND
    • ERR_SOCKET_CLOSED
    • ERR_SOCKET_DGRAM_NOT_RUNNING
    • ERR_STDERR_CLOSE
    • ERR_STDOUT_CLOSE
    • ERR_TLS_CERT_ALTNAME_INVALID
    • ERR_TLS_DH_PARAM_SIZE
    • ERR_TLS_HANDSHAKE_TIMEOUT
    • ERR_TLS_RENEGOTIATION_FAILED
    • ERR_TLS_REQUIRED_SERVER_NAME
    • ERR_TLS_SESSION_ATTACK
    • ERR_TRANSFORM_ALREADY_TRANSFORMING
    • ERR_TRANSFORM_WITH_LENGTH_0
    • ERR_UNKNOWN_SIGNAL
    • ERR_UNKNOWN_STDIN_TYPE
    • ERR_UNKNOWN_STREAM_TYPE
    • ERR_V8BREAKITERATOR
    • ERR_VALID_PERFORMANCE_ENTRY_TYPE
    • ERR_VALUE_OUT_OF_RANGE
• Events
  • Passing arguments and this to listeners
  • Asynchronous vs. Synchronous
  • Handling events only once
  • Error events
  • Class: EventEmitter
    • Event: 'newListener'
    • Event: 'removeListener'
    • EventEmitter.listenerCount(emitter, eventName)
    • EventEmitter.defaultMaxListeners
    • emitter.addListener(eventName, listener)
    • emitter.emit(eventName[, ...args])
    • emitter.eventNames()
    • emitter.getMaxListeners()
    • emitter.listenerCount(eventName)
    • emitter.listeners(eventName)
    • emitter.on(eventName, listener)
    • emitter.once(eventName, listener)
    • emitter.prependListener(eventName, listener)
    • emitter.prependOnceListener(eventName, listener)
    • emitter.removeAllListeners([eventName])
    • emitter.removeListener(eventName, listener)
    • emitter.setMaxListeners(n)
• File System
  • Threadpool Usage
  • WHATWG URL object support
  • Buffer API
  • Class: fs.FSWatcher
    • Event: 'change'
    • Event: 'error'
    • watcher.close()
  • Class: fs.ReadStream
    • Event: 'close'
    • Event: 'open'
    • readStream.bytesRead
    • readStream.path
  • Class: fs.Stats
    • Stat Time Values
  • Class: fs.WriteStream
    • Event: 'close'
    • Event: 'open'
    • writeStream.bytesWritten
    • writeStream.path
  • fs.access(path[, mode], callback)
  • fs.accessSync(path[, mode])
  • fs.appendFile(file, data[, options], callback)
  • fs.appendFileSync(file, data[, options])
  • fs.chmod(path, mode, callback)
    • File modes
  • fs.chmodSync(path, mode)
  • fs.chown(path, uid, gid, callback)
  • fs.chownSync(path, uid, gid)
  • fs.close(fd, callback)
  • fs.closeSync(fd)
  • fs.constants
  • fs.copyFile(src, dest[, flags], callback)
  • fs.copyFileSync(src, dest[, flags])
  • fs.createReadStream(path[, options])
  • fs.createWriteStream(path[, options])
  • fs.exists(path, callback)
  • fs.existsSync(path)
  • fs.fchmod(fd, mode, callback)
  • fs.fchmodSync(fd, mode)
  • fs.fchown(fd, uid, gid, callback)
  • fs.fchownSync(fd, uid, gid)
  • fs.fdatasync(fd, callback)
  • fs.fdatasyncSync(fd)
  • fs.fstat(fd, callback)
  • fs.fstatSync(fd)
  • fs.fsync(fd, callback)
  • fs.fsyncSync(fd)
  • fs.ftruncate(fd[, len], callback)
  • fs.ftruncateSync(fd[, len])
  • fs.futimes(fd, atime, mtime, callback)
  • fs.futimesSync(fd, atime, mtime)
  • fs.lchmod(path, mode, callback)
  • fs.lchmodSync(path, mode)
  • fs.lchown(path, uid, gid, callback)
  • fs.lchownSync(path, uid, gid)
  • fs.link(existingPath, newPath, callback)
  • fs.linkSync(existingPath, newPath)
  • fs.lstat(path, callback)
  • fs.lstatSync(path)
  • fs.mkdir(path[, mode], callback)
  • fs.mkdirSync(path[, mode])
  • fs.mkdtemp(prefix[, options], callback)
  • fs.mkdtempSync(prefix[, options])
  • fs.open(path, flags[, mode], callback)
  • fs.openSync(path, flags[, mode])
  • fs.read(fd, buffer, offset, length, position, callback)
  • fs.readdir(path[, options], callback)
  • fs.readdirSync(path[, options])
  • fs.readFile(path[, options], callback)
  • fs.readFileSync(path[, options])
  • fs.readlink(path[, options], callback)
  • fs.readlinkSync(path[, options])
  • fs.readSync(fd, buffer, offset, length, position)
  • fs.realpath(path[, options], callback)
  • fs.realpathSync(path[, options])
  • fs.rename(oldPath, newPath, callback)
  • fs.renameSync(oldPath, newPath)
  • fs.rmdir(path, callback)
  • fs.rmdirSync(path)
  • fs.stat(path, callback)
  • fs.statSync(path)
  • fs.symlink(target, path[, type], callback)
  • fs.symlinkSync(target, path[, type])
  • fs.truncate(path[, len], callback)
  • fs.truncateSync(path[, len])
  • fs.unlink(path, callback)
  • fs.unlinkSync(path)
  • fs.unwatchFile(filename[, listener])
  • fs.utimes(path, atime, mtime, callback)
  • fs.utimesSync(path, atime, mtime)
  • fs.watch(filename[, options][, listener])
    • Caveats
      • Availability
      • Inodes
      • Filename Argument
  • fs.watchFile(filename[, options], listener)
  • fs.write(fd, buffer[, offset[, length[, position]]], callback)
  • fs.write(fd, string[, position[, encoding]], callback)
  • fs.writeFile(file, data[, options], callback)
  • fs.writeFileSync(file, data[, options])
  • fs.writeSync(fd, buffer[, offset[, length[, position]]])
  • fs.writeSync(fd, string[, position[, encoding]])
  • FS Constants
    • File Access Constants
    • File Open Constants
    • File Type Constants
    • File Mode Constants
• Global Objects
  • Class: Buffer
  • __dirname
  • __filename
  • clearImmediate(immediateObject)
  • clearInterval(intervalObject)
  • clearTimeout(timeoutObject)
  • console
  • exports
  • global
  • module
  • process
  • require()
  • setImmediate(callback[, ...args])
  • setInterval(callback, delay[, ...args])
  • setTimeout(callback, delay[, ...args])
• HTTP
  • Class: http.Agent
    • new Agent([options])
    • agent.createConnection(options[, callback])
    • agent.keepSocketAlive(socket)
    • agent.reuseSocket(socket, request)
    • agent.destroy()
    • agent.freeSockets
    • agent.getName(options)
    • agent.maxFreeSockets
    • agent.maxSockets
    • agent.requests
    • agent.sockets
  • Class: http.ClientRequest
    • Event: 'abort'
    • Event: 'connect'
    • Event: 'continue'
    • Event: 'response'
    • Event: 'socket'
    • Event: 'timeout'
    • Event: 'upgrade'
    • request.abort()
    • request.aborted
    • request.connection
    • request.end([data[, encoding]][, callback])
    • request.flushHeaders()
    • request.getHeader(name)
    • request.removeHeader(name)
    • request.setHeader(name, value)
    • request.setNoDelay([noDelay])
    • request.setSocketKeepAlive([enable][, initialDelay])
    • request.setTimeout(timeout[, callback])
    • request.socket
    • request.write(chunk[, encoding][, callback])
  • Class: http.Server
    • Event: 'checkContinue'
    • Event: 'checkExpectation'
    • Event: 'clientError'
    • Event: 'close'
    • Event: 'connect'
    • Event: 'connection'
    • Event: 'request'
    • Event: 'upgrade'
    • server.close([callback])
    • server.listen()
    • server.listening
    • server.maxHeadersCount
    • server.setTimeout([msecs][, callback])
    • server.timeout
    • server.keepAliveTimeout
  • Class: http.ServerResponse
    • Event: 'close'
    • Event: 'finish'
    • response.addTrailers(headers)
    • response.connection
    • response.end([data][, encoding][, callback])
    • response.finished
    • response.getHeader(name)
    • response.getHeaderNames()
    • response.getHeaders()
    • response.hasHeader(name)
    • response.headersSent
    • response.removeHeader(name)
    • response.sendDate
    • response.setHeader(name, value)
    • response.setTimeout(msecs[, callback])
    • response.socket
    • response.statusCode
    • response.statusMessage
    • response.write(chunk[, encoding][, callback])
    • response.writeContinue()
    • response.writeHead(statusCode[, statusMessage][, headers])
  • Class: http.IncomingMessage
    • Event: 'aborted'
    • Event: 'close'
    • message.destroy([error])
    • message.headers
    • message.httpVersion
    • message.method
    • message.rawHeaders
    • message.rawTrailers
    • message.setTimeout(msecs, callback)
    • message.socket
    • message.statusCode
    • message.statusMessage
    • message.trailers
    • message.url
  • http.METHODS
  • http.STATUS_CODES
  • http.createServer([options][, requestListener])
  • http.get(options[, callback])
  • http.globalAgent
  • http.request(options[, callback])
• HTTP/2
  • Core API
    • Server-side example
    • Client-side example
    • Class: Http2Session
      • Http2Session and Sockets
      • Event: 'close'
      • Event: 'connect'
      • Event: 'error'
      • Event: 'frameError'
      • Event: 'goaway'
      • Event: 'localSettings'
      • Event: 'remoteSettings'
      • Event: 'stream'
      • Event: 'timeout'
      • http2session.alpnProtocol
      • http2session.close([callback])
      • http2session.closed
      • http2session.connecting
      • http2session.destroy([error,][code])
      • http2session.destroyed
      • http2session.encrypted
      • http2session.goaway([code, [lastStreamID, [opaqueData]]])
      • http2session.localSettings
      • http2session.originSet
      • http2session.pendingSettingsAck
      • http2session.ping([payload, ]callback)
      • http2session.ref()
      • http2session.remoteSettings
      • http2session.setTimeout(msecs, callback)
      • http2session.socket
      • http2session.state
      • http2session.settings(settings)
      • http2session.type
      • http2session.unref()
    • Class: ServerHttp2Session
      • serverhttp2session.altsvc(alt, originOrStream)
      • Specifying alternative services
    • Class: ClientHttp2Session
      • Event: 'altsvc'
      • clienthttp2session.request(headers[, options])
    • Class: Http2Stream
      • Http2Stream Lifecycle
        • Creation
        • Destruction
      • Event: 'aborted'
      • Event: 'close'
      • Event: 'error'
      • Event: 'frameError'
      • Event: 'timeout'
      • Event: 'trailers'
      • http2stream.aborted
      • http2stream.close(code[, callback])
      • http2stream.closed
      • http2stream.destroyed
      • http2stream.pending
      • http2stream.priority(options)
      • http2stream.rstCode
      • http2stream.sentHeaders
      • http2stream.sentInfoHeaders
      • http2stream.sentTrailers
      • http2stream.session
      • http2stream.setTimeout(msecs, callback)
      • http2stream.state
    • Class: ClientHttp2Stream
      • Event: 'continue'
      • Event: 'headers'
      • Event: 'push'
      • Event: 'response'
    • Class: ServerHttp2Stream
      • http2stream.additionalHeaders(headers)
      • http2stream.headersSent
      • http2stream.pushAllowed
      • http2stream.pushStream(headers[, options], callback)
      • http2stream.respond([headers[, options]])
      • http2stream.respondWithFD(fd[, headers[, options]])
      • http2stream.respondWithFile(path[, headers[, options]])
    • Class: Http2Server
      • Event: 'checkContinue'
      • Event: 'request'
      • Event: 'session'
      • Event: 'sessionError'
      • Event: 'streamError'
      • Event: 'stream'
      • Event: 'timeout'
      • server.close([callback])
    • Class: Http2SecureServer
      • Event: 'checkContinue'
      • Event: 'request'
      • Event: 'session'
      • Event: 'sessionError'
      • Event: 'stream'
      • Event: 'timeout'
      • Event: 'unknownProtocol'
      • server.close([callback])
    • http2.createServer(options[, onRequestHandler])
    • http2.createSecureServer(options[, onRequestHandler])
    • http2.connect(authority[, options][, listener])
    • http2.constants
      • Error Codes for RST_STREAM and GOAWAY
    • http2.getDefaultSettings()
    • http2.getPackedSettings(settings)
    • http2.getUnpackedSettings(buf)
    • Headers Object
    • Settings Object
    • Using options.selectPadding
    • Error Handling
    • Invalid character handling in header names and values
    • Push streams on the client
    • Supporting the CONNECT method
  • Compatibility API
    • ALPN negotiation
    • Class: http2.Http2ServerRequest
      • Event: 'aborted'
      • Event: 'close'
      • request.destroy([error])
      • request.headers
      • request.httpVersion
      • request.method
      • request.rawHeaders
      • request.rawTrailers
      • request.setTimeout(msecs, callback)
      • request.socket
      • request.stream
      • request.trailers
      • request.url
    • Class: http2.Http2ServerResponse
      • Event: 'close'
      • Event: 'finish'
      • response.addTrailers(headers)
      • response.connection
      • response.end([data][, encoding][, callback])
      • response.finished
      • response.getHeader(name)
      • response.getHeaderNames()
      • response.getHeaders()
      • response.hasHeader(name)
      • response.headersSent
      • response.removeHeader(name)
      • response.sendDate
      • response.setHeader(name, value)
      • response.setTimeout(msecs[, callback])
      • response.socket
      • response.statusCode
      • response.statusMessage
      • response.stream
      • response.write(chunk[, encoding][, callback])
      • response.writeContinue()
      • response.writeHead(statusCode[, statusMessage][, headers])
      • response.createPushResponse(headers, callback)
  • Collecting HTTP/2 Performance Metrics
• HTTPS
  • Class: https.Agent
  • Class: https.Server
    • server.close([callback])
    • server.listen()
    • server.setTimeout([msecs][, callback])
    • server.timeout
    • server.keepAliveTimeout
  • https.createServer([options][, requestListener])
  • https.get(options[, callback])
  • https.globalAgent
  • https.request(options[, callback])
• Inspector
  • inspector.open([port[, host[, wait]]])
    • inspector.close()
    • inspector.url()
  • Class: inspector.Session
    • Constructor: new inspector.Session()
    • Event: 'inspectorNotification'
    • Event: <inspector-protocol-method>
    • session.connect()
    • session.post(method[, params][, callback])
    • session.disconnect()
  • Example usage
    • CPU Profiler
• Internationalization Support
  • Options for building Node.js
    • Disable all internationalization features (none)
    • Build with a pre-installed ICU (system-icu)
    • Embed a limited set of ICU data (small-icu)
      • Providing ICU data at runtime
    • Embed the entire ICU (full-icu)
  • Detecting internationalization support
• Modules
  • Accessing the main module
  • Addenda: Package Manager Tips
  • All Together...
  • Caching
    • Module Caching Caveats
  • Core Modules
  • Cycles
  • File Modules
  • Folders as Modules
  • Loading from node_modules Folders
  • Loading from the global folders
  • The module wrapper
  • The module scope
    • __dirname
    • __filename
    • exports
    • module
    • require()
      • require.cache
      • require.extensions
      • require.resolve(request[, options])
      • require.resolve.paths(request)
  • The module Object
    • module.children
    • module.exports
      • exports shortcut
    • module.filename
    • module.id
    • module.loaded
    • module.parent
    • module.paths
    • module.require(id)
  • The Module Object
    • module.builtinModules
• Net
  • IPC Support
    • Identifying paths for IPC connections
  • Class: net.Server
    • new net.Server([options][, connectionListener])
    • Event: 'close'
    • Event: 'connection'
    • Event: 'error'
    • Event: 'listening'
    • server.address()
    • server.close([callback])
    • server.connections
    • server.getConnections(callback)
    • server.listen()
      • server.listen(handle[, backlog][, callback])
      • server.listen(options[, callback])
      • server.listen(path[, backlog][, callback])
      • server.listen([port][, host][, backlog][, callback])
    • server.listening
    • server.maxConnections
    • server.ref()
    • server.unref()
  • Class: net.Socket
    • new net.Socket([options])
    • Event: 'close'
    • Event: 'connect'
    • Event: 'data'
    • Event: 'drain'
    • Event: 'end'
    • Event: 'error'
    • Event: 'lookup'
    • Event: 'timeout'
    • socket.address()
    • socket.bufferSize
    • socket.bytesRead
    • socket.bytesWritten
    • socket.connect()
      • socket.connect(options[, connectListener])
      • socket.connect(path[, connectListener])
      • socket.connect(port[, host][, connectListener])
    • socket.connecting
    • socket.destroy([exception])
    • socket.destroyed
    • socket.end([data][, encoding])
    • socket.localAddress
    • socket.localPort
    • socket.pause()
    • socket.ref()
    • socket.remoteAddress
    • socket.remoteFamily
    • socket.remotePort
    • socket.resume()
    • socket.setEncoding([encoding])
    • socket.setKeepAlive([enable][, initialDelay])
    • socket.setNoDelay([noDelay])
    • socket.setTimeout(timeout[, callback])
    • socket.unref()
    • socket.write(data[, encoding][, callback])
  • net.connect()
    • net.connect(options[, connectListener])
    • net.connect(path[, connectListener])
    • net.connect(port[, host][, connectListener])
  • net.createConnection()
    • net.createConnection(options[, connectListener])
    • net.createConnection(path[, connectListener])
    • net.createConnection(port[, host][, connectListener])
  • net.createServer([options][, connectionListener])
  • net.isIP(input)
  • net.isIPv4(input)
  • net.isIPv6(input)
• OS
  • os.EOL
  • os.arch()
  • os.constants
  • os.cpus()
  • os.endianness()
  • os.freemem()
  • os.homedir()
  • os.hostname()
  • os.loadavg()
  • os.networkInterfaces()
  • os.platform()
  • os.release()
  • os.tmpdir()
  • os.totalmem()
  • os.type()
  • os.uptime()
  • os.userInfo([options])
  • OS Constants
    • Signal Constants
    • Error Constants
      • POSIX Error Constants
      • Windows Specific Error Constants
    • libuv Constants
• Path
  • Windows vs. POSIX
  • path.basename(path[, ext])
  • path.delimiter
  • path.dirname(path)
  • path.extname(path)
  • path.format(pathObject)
  • path.isAbsolute(path)
  • path.join([...paths])
  • path.normalize(path)
  • path.parse(path)
  • path.posix
  • path.relative(from, to)
  • path.resolve([...paths])
  • path.sep
  • path.win32
• Performance Timing API
  • Class: Performance
    • performance.clearEntries(name)
    • performance.clearFunctions([name])
    • performance.clearGC()
    • performance.clearMarks([name])
    • performance.clearMeasures([name])
    • performance.getEntries()
    • performance.getEntriesByName(name[, type])
    • performance.getEntriesByType(type)
    • performance.mark([name])
    • performance.maxEntries
    • performance.measure(name, startMark, endMark)
    • performance.nodeTiming
    • performance.now()
    • performance.timeOrigin
    • performance.timerify(fn)
  • Class: PerformanceEntry
    • performanceEntry.duration
    • performanceEntry.name
    • performanceEntry.startTime
    • performanceEntry.entryType
    • performanceEntry.kind
  • Class: PerformanceNodeTiming extends PerformanceEntry
    • performanceNodeTiming.bootstrapComplete
    • performanceNodeTiming.clusterSetupEnd
    • performanceNodeTiming.clusterSetupStart
    • performanceNodeTiming.loopExit
    • performanceNodeTiming.loopStart
    • performanceNodeTiming.moduleLoadEnd
    • performanceNodeTiming.moduleLoadStart
    • performanceNodeTiming.nodeStart
    • performanceNodeTiming.preloadModuleLoadEnd
    • performanceNodeTiming.preloadModuleLoadStart
    • performanceNodeTiming.thirdPartyMainEnd
    • performanceNodeTiming.thirdPartyMainStart
    • performanceNodeTiming.v8Start
  • Class: PerformanceObserver(callback)
    • Callback: PerformanceObserverCallback(list, observer)
    • Class: PerformanceObserverEntryList
      • performanceObserverEntryList.getEntries()
      • performanceObserverEntryList.getEntriesByName(name[, type])
      • performanceObserverEntryList.getEntriesByType(type)
    • performanceObserver.disconnect()
    • performanceObserver.observe(options)
  • Examples