| util.types.isAnyArrayBuffer() | It performs type checking for any built-in ArrayBuffer objects in the node.js. |
| util.types.isArgumentsObject() | It checks if the given value is an arguments object or not. |
| util.types.isArrayBuffer() | It checks for built-in ArrayBuffer type objects in the node.js. |
| util.types.isAsyncFunction() | It is used to type check for asynchronous functions in the node.js. |
| util.types.isBigInt64Array() | It is used to type check for BigInt64Array in the node.js. |
| util.types.isUint16Array() | It checks whether the value passed is of type Uint16Array or not. |
| util.types.isNativeError() | It identifies whether the value is an instance of a built-in Error type. |
| util.types.isModuleNamespaceObject() | It checks whether the following object is an instance of Module Namespace Object. |
| util.types.isArrayBufferView() | It checks whether the value is an instance of one of the typed array objects or whether DataView. |
| util.types.isUint32Array() | It checks whether the value passed is of type Uint32Array or not. |
| util.types.isFloat64Array() | It is used to check for Float64Array type in the node.js. |
| util.types.isInt16Array() | It is used to check the type for Int16Array in the node.js. |
| util.types.isInt8Array() | It is used to type check for Int8Array in the node.js. |
| util.types.isDate() | It is used to check the type for Date in the node.js. |
| util.types.isFloat32Array() | It is used to type check for Float32Array in the node.js. |
| util.types.isProxy() | It checks if the given value is a proxy instance or not. |
| util.types.isGeneratorObject() | It checks if the given value is a generator object or not. |
| util.types.isBigUint64Array() | It check if the given value is a BigUint64Array object. |
| util.types.isUint8ClampedArray() | It checks if the given value is an unsigned 8-bit clamped integer array or not. |
| util.types.isBoxedPrimitive() | It checks if the given value is a boxed primitive or not. |
| util.types.isGeneratorFunction() | It checks if the given value is a generator function or not. |
| util.types.isDataView() | It checks if the given value is a DataView object or not. |
| util.types.isSharedArrayBuffer() | It checks whether the passed instance in the method is a built-in SharedArrayBuffer instance or not. |
| util.types.isUint8Array() | It checks whether the passed instance in the method is a built-in Uint8Array instance or not. |
| util.types.isSet() | It checks whether the passed instance in the method is a built-in Set instance or not. |
| util.types.isStringObject() | It checks whether the passed instance in the method is a String object or not. |
| util.types.isSymbolObject() | It determines whether the value is a symbol object. |
| util.types.isPromise() | It determines whether the value is a built-in Promise. |
| util.types.isTypedArray() | It determines whether the value is a built-in TypedArray instance. |
| util.types.isNumberObject() | It checks whether the passed value is a Number object or not. |
| util.types.isRegExp() | It checks whether the passed value is a regular expression. |
| util.types.isInt32Array() | It checks whether the passed instance in the method is a built-in Int32Array instance or not. |
| util.types.isWeakSet() | It determines whether the value is a built-in WeakSet instance or not. |
| util.types.isMap() | It determines whether the value is a built-in Map instance or not. |
| util.types.isWeakMap() | It determines whether the value is a built-in WeakMap instance or not. |
| util.types.isMapIterator() | It determines whether the value is an iterator returned for a built-in Map instance or not. |
| util.types.isBooleanObject() | It determines whether the value is a Boolean object or not. |
| util.types.isSetIterator() | It determines whether the value is an iterator returned for a built-in set instance. |