- Assertion testing
- Asynchronous context tracking
- Async hooks
- Buffer
- C++ addons
- C/C++ addons with Node-API
- C++ embedder API
- Child processes
- Cluster
- Command-line options
- Console
- Corepack
- Crypto
- Debugger
- Deprecated APIs
- Diagnostics Channel
- DNS
- Domain
- Errors
- Events
- File system
- Globals
- HTTP
- HTTP/2
- HTTPS
- Inspector
- Internationalization
- Modules: CommonJS modules
- Modules: ECMAScript modules
- Modules:
node:moduleAPI - Modules: Packages
- Net
- OS
- Path
- Performance hooks
- Permissions
- Process
- Punycode
- Query strings
- Readline
- REPL
- Report
- Stream
- String decoder
- Test runner
- Timers
- TLS/SSL
- Trace events
- TTY
- UDP/datagram
- URL
- Utilities
- V8
- VM
- WASI
- Web Crypto API
- Web Streams API
- Worker threads
- Zlib
Node.js v18.12.1 documentation
- Node.js v18.12.1
-
► Table of contents
- Util
util.callbackify(original)util.debuglog(section[, callback])util.debug(section)util.deprecate(fn, msg[, code])util.format(format[, ...args])util.formatWithOptions(inspectOptions, format[, ...args])util.getSystemErrorName(err)util.getSystemErrorMap()util.inherits(constructor, superConstructor)util.inspect(object[, options])util.inspect(object[, showHidden[, depth[, colors]]])util.isDeepStrictEqual(val1, val2)util.parseArgs([config])util.promisify(original)util.stripVTControlCharacters(str)- Class:
util.TextDecoder - Class:
util.TextEncoder util.toUSVString(string)util.transferableAbortController()util.transferableAbortSignal(signal)util.typesutil.types.isAnyArrayBuffer(value)util.types.isArrayBufferView(value)util.types.isArgumentsObject(value)util.types.isArrayBuffer(value)util.types.isAsyncFunction(value)util.types.isBigInt64Array(value)util.types.isBigUint64Array(value)util.types.isBooleanObject(value)util.types.isBoxedPrimitive(value)util.types.isCryptoKey(value)util.types.isDataView(value)util.types.isDate(value)util.types.isExternal(value)util.types.isFloat32Array(value)util.types.isFloat64Array(value)util.types.isGeneratorFunction(value)util.types.isGeneratorObject(value)util.types.isInt8Array(value)util.types.isInt16Array(value)util.types.isInt32Array(value)util.types.isKeyObject(value)util.types.isMap(value)util.types.isMapIterator(value)util.types.isModuleNamespaceObject(value)util.types.isNativeError(value)util.types.isNumberObject(value)util.types.isPromise(value)util.types.isProxy(value)util.types.isRegExp(value)util.types.isSet(value)util.types.isSetIterator(value)util.types.isSharedArrayBuffer(value)util.types.isStringObject(value)util.types.isSymbolObject(value)util.types.isTypedArray(value)util.types.isUint8Array(value)util.types.isUint8ClampedArray(value)util.types.isUint16Array(value)util.types.isUint32Array(value)util.types.isWeakMap(value)util.types.isWeakSet(value)util.types.isWebAssemblyCompiledModule(value)
- Deprecated APIs
util._extend(target, source)util.isArray(object)util.isBoolean(object)util.isBuffer(object)util.isDate(object)util.isError(object)util.isFunction(object)util.isNull(object)util.isNullOrUndefined(object)util.isNumber(object)util.isObject(object)util.isPrimitive(object)util.isRegExp(object)util.isString(object)util.isSymbol(object)util.isUndefined(object)util.log(string)
- Util
-
► Index
- Assertion testing
- Asynchronous context tracking
- Async hooks
- Buffer
- C++ addons
- C/C++ addons with Node-API
- C++ embedder API
- Child processes
- Cluster
- Command-line options
- Console
- Corepack
- Crypto
- Debugger
- Deprecated APIs
- Diagnostics Channel
- DNS
- Domain
- Errors
- Events
- File system
- Globals
- HTTP
- HTTP/2
- HTTPS
- Inspector
- Internationalization
- Modules: CommonJS modules
- Modules: ECMAScript modules
- Modules:
node:moduleAPI - Modules: Packages
- Net
- OS
- Path
- Performance hooks
- Permissions
- Process
- Punycode
- Query strings
- Readline
- REPL
- Report
- Stream
- String decoder
- Test runner
- Timers
- TLS/SSL
- Trace events
- TTY
- UDP/datagram
- URL
- Utilities
- V8
- VM
- WASI
- Web Crypto API
- Web Streams API
- Worker threads
- Zlib
- ► Other versions
- ►Options
Table of contents
- Util
util.callbackify(original)util.debuglog(section[, callback])util.debug(section)util.deprecate(fn, msg[, code])util.format(format[, ...args])util.formatWithOptions(inspectOptions, format[, ...args])util.getSystemErrorName(err)util.getSystemErrorMap()util.inherits(constructor, superConstructor)util.inspect(object[, options])util.inspect(object[, showHidden[, depth[, colors]]])util.isDeepStrictEqual(val1, val2)util.parseArgs([config])util.promisify(original)util.stripVTControlCharacters(str)- Class:
util.TextDecoder - Class:
util.TextEncoder util.toUSVString(string)util.transferableAbortController()util.transferableAbortSignal(signal)util.typesutil.types.isAnyArrayBuffer(value)util.types.isArrayBufferView(value)util.types.isArgumentsObject(value)util.types.isArrayBuffer(value)util.types.isAsyncFunction(value)util.types.isBigInt64Array(value)util.types.isBigUint64Array(value)util.types.isBooleanObject(value)util.types.isBoxedPrimitive(value)util.types.isCryptoKey(value)util.types.isDataView(value)util.types.isDate(value)util.types.isExternal(value)util.types.isFloat32Array(value)util.types.isFloat64Array(value)util.types.isGeneratorFunction(value)util.types.isGeneratorObject(value)util.types.isInt8Array(value)util.types.isInt16Array(value)util.types.isInt32Array(value)util.types.isKeyObject(value)util.types.isMap(value)util.types.isMapIterator(value)util.types.isModuleNamespaceObject(value)util.types.isNativeError(value)util.types.isNumberObject(value)util.types.isPromise(value)util.types.isProxy(value)util.types.isRegExp(value)util.types.isSet(value)util.types.isSetIterator(value)util.types.isSharedArrayBuffer(value)util.types.isStringObject(value)util.types.isSymbolObject(value)util.types.isTypedArray(value)util.types.isUint8Array(value)util.types.isUint8ClampedArray(value)util.types.isUint16Array(value)util.types.isUint32Array(value)util.types.isWeakMap(value)util.types.isWeakSet(value)util.types.isWebAssemblyCompiledModule(value)
- Deprecated APIs
util._extend(target, source)util.isArray(object)util.isBoolean(object)util.isBuffer(object)util.isDate(object)util.isError(object)util.isFunction(object)util.isNull(object)util.isNullOrUndefined(object)util.isNumber(object)util.isObject(object)util.isPrimitive(object)util.isRegExp(object)util.isString(object)util.isSymbol(object)util.isUndefined(object)util.log(string)
Util#
Stability: 2 - Stable
Source Code: lib/util.js
The node:util module supports the needs of Node.js internal APIs. node:util模块支持Node.js内部API的需求。Many of the utilities are useful for application and module developers as well. 许多实用程序对应用程序和模块开发人员也很有用。To access it:要访问它：
const util = require('node:util');