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types - util - Node documentation
namespace types

Usage in Deno

import { types } from "node:util";

Functions

f
types.isAnyArrayBuffer

Returns true if the value is a built-in ArrayBuffer orSharedArrayBuffer instance.

f
types.isArgumentsObject

Returns true if the value is an arguments object.

f
types.isArrayBuffer

Returns true if the value is a built-in ArrayBuffer instance.This does not include SharedArrayBuffer instances. Usually, it isdesirable to test for both; See util.types.isAnyArrayBuffer() for that.

f
types.isArrayBufferView

Returns true if the value is an instance of one of the ArrayBuffer views, such as typedarray objects or DataView. Equivalent toArrayBuffer.isView().

f
types.isAsyncFunction

Returns true if the value is an async function.This only reports back what the JavaScript engine is seeing;in particular, the return value may not match the original source code ifa transpilation tool was used.

f
types.isBigInt64Array

Returns true if the value is a BigInt64Array instance.

f
types.isBigUint64Array

Returns true if the value is a BigUint64Array instance.

f
types.isBooleanObject

Returns true if the value is a boolean object, e.g. createdby new Boolean().

f
types.isBoxedPrimitive

Returns true if the value is any boxed primitive object, e.g. createdby new Boolean(), new String() or Object(Symbol()).

f
types.isCryptoKey

Returns true if value is a CryptoKey, false otherwise.

f
types.isDataView

Returns true if the value is a built-in DataView instance.

f
types.isDate

Returns true if the value is a built-in Date instance.

f
types.isExternal

Returns true if the value is a native External value.

f
types.isFloat32Array

Returns true if the value is a built-in Float32Array instance.

f
types.isFloat64Array

Returns true if the value is a built-in Float64Array instance.

f
types.isGeneratorFunction

Returns true if the value is a generator function.This only reports back what the JavaScript engine is seeing;in particular, the return value may not match the original source code ifa transpilation tool was used.

f
types.isGeneratorObject

Returns true if the value is a generator object as returned from abuilt-in generator function.This only reports back what the JavaScript engine is seeing;in particular, the return value may not match the original source code ifa transpilation tool was used.

f
types.isInt16Array

Returns true if the value is a built-in Int16Array instance.

f
types.isInt32Array

Returns true if the value is a built-in Int32Array instance.

f
types.isInt8Array

Returns true if the value is a built-in Int8Array instance.

f
types.isKeyObject

Returns true if value is a KeyObject, false otherwise.

f
types.isMap

Returns true if the value is a built-in Map instance.

f
types.isMapIterator

Returns true if the value is an iterator returned for a built-in Map instance.

f
types.isModuleNamespaceObject

Returns true if the value is an instance of a Module Namespace Object.

f
types.isNativeError

Returns true if the value was returned by the constructor of a built-in Error type.

f
types.isNumberObject

Returns true if the value is a number object, e.g. createdby new Number().

f
types.isPromise

Returns true if the value is a built-in Promise.

f
types.isProxy

Returns true if the value is a Proxy instance.

f
types.isRegExp

Returns true if the value is a regular expression object.

f
types.isSet

Returns true if the value is a built-in Set instance.

f
types.isSetIterator

Returns true if the value is an iterator returned for a built-in Set instance.

f
types.isSharedArrayBuffer

Returns true if the value is a built-in SharedArrayBuffer instance.This does not include ArrayBuffer instances. Usually, it isdesirable to test for both; See util.types.isAnyArrayBuffer() for that.

f
types.isStringObject

Returns true if the value is a string object, e.g. createdby new String().

f
types.isSymbolObject

Returns true if the value is a symbol object, createdby calling Object() on a Symbol primitive.

f
types.isTypedArray

Returns true if the value is a built-in TypedArray instance.

f
types.isUint16Array

Returns true if the value is a built-in Uint16Array instance.

f
types.isUint32Array

Returns true if the value is a built-in Uint32Array instance.

f
types.isUint8Array

Returns true if the value is a built-in Uint8Array instance.

f
types.isUint8ClampedArray

Returns true if the value is a built-in Uint8ClampedArray instance.

f
types.isWeakMap

Returns true if the value is a built-in WeakMap instance.

f
types.isWeakSet

Returns true if the value is a built-in WeakSet instance.