Type-checking utilities for JavaScript
npm install go-typesType-checking utilities for JavaScript.
!codecov.io Code Coverage
* version: 1.3.1
* license: MIT
``javascript`
npm i go-types
or
`javascript`
yarn add go-types
`javascript
import Types from 'go-types'
Types.isArray([]);
`
or
`javascript
import { isArray } from 'go-types';
isArray([]);
`
`javascript
const Types = require('go-types');
Types.isArray([]);
`
or
`javascript
const { isArray } = require('go-types');
isArray([]);
`
`javascript
`
#### Table of Contents
* Primitive
* isUndefined
* Parameters
* Examples
* isNull
* Parameters
* Examples
* isBoolean
* Parameters
* Examples
* isNumber
* Parameters
* Examples
* isString
* Parameters
* Examples
* isSymbol
* Parameters
* Examples
* isBigInt
* Parameters
* Examples
* isPrimitive
* Parameters
* Examples
* Utility
* isNullish
* Parameters
* Examples
* isEmpty
* Parameters
* Examples
* isBlank
* Parameters
* Examples
* isTruthy
* Parameters
* Examples
* isFalsy
* Parameters
* Examples
* isTypeOf
* Parameters
* Examples
* Number
* isInteger
* Parameters
* Examples
* isFloat
* Parameters
* Examples
* isFinite
* Parameters
* Examples
* isInfinite
* Parameters
* Examples
* isNaN
* Parameters
* Examples
* isNumeric
* Parameters
* Examples
* Object
* isObject
* Parameters
* Examples
* isPlainObject
* Parameters
* Examples
* isCyclic
* Parameters
* Examples
* isIterable
* Parameters
* Examples
* isFunction
* Parameters
* Examples
* isDate
* Parameters
* Examples
* isValidDate
* Parameters
* Examples
* isInvalidDate
* Parameters
* Examples
* isRegExp
* Parameters
* Examples
* isPromise
* Parameters
* Examples
* isPromiseLike
* Parameters
* Examples
* isThenable
* Parameters
* Examples
* isError
* Parameters
* Examples
* Array
* isArray
* Parameters
* Examples
* isArrayOf
* Parameters
* Examples
* isArrayLike
* Parameters
* Examples
* isArrayLikeOf
* Parameters
* Examples
* isPair
* Parameters
* Examples
* Collection
* isMap
* Parameters
* Examples
* isSet
* Parameters
* Examples
* isWeakMap
* Parameters
* Examples
* isWeakSet
* Parameters
* Examples
* Node
* isNode
* Parameters
* Examples
* isElement
* Parameters
* Examples
* isFragment
* Parameters
* Examples
#### isUndefined
Determines whether the value is undefined.
##### Parameters
* value any The value to check.
##### Examples
Undefined values
`javascript`
// returns true
isUndefined(undefined);
isUndefined(void 0);
Non-undefined values
`javascript`
// returns false
isUndefined(null);
isUndefined(false);
isUndefined(0);
isUndefined("");
isUndefined(NaN);
Returns boolean true if the value is undefined; false otherwise.
Meta
* since: 1.0.0
#### isNull
Determines whether the value is null.
##### Parameters
* value any The value to check.
##### Examples
Null values
`javascript`
// returns true
isNull(null);
Non-null values
`javascript`
// returns false
isNull(undefined);
isNull(false);
isNull(0);
isNull("");
isNull(NaN);
Returns boolean true if the value is null; false otherwise.
Meta
* since: 1.0.0
#### isBoolean
* See: Types.isPrimitive
* See: Types.isObject
* See: Types.isTypeOf
Determines whether the value is a primitive boolean or Boolean object.
##### Parameters
* value any The value to check.
##### Examples
Boolean values
`javascript`
// returns true
isBoolean(true);
isBoolean(new Boolean(true));
Non-boolean values
`javascript`
// returns false
isBoolean(1);
isBoolean("true");
Returns boolean true if the value is a primitive boolean or Boolean object; false otherwise.
Meta
* since: 1.0.0
#### isNumber
* See: Types.isPrimitive
* See: Types.isObject
* See: Types.isTypeOf
Determines whether the value is a primitive number or Number object
which includes the "special" numbers +Infinity, -Infinity and NaN.
##### Parameters
* value any The value to check.
##### Examples
Number values
`javascript`
// returns true
isNumber(1);
isNumber(-12.34);
isNumber(new Number(1));
isNumber(Infinity);
isNumber(NaN);
Non-number values
`javascript`
// returns false
isNumber("1");
isNumber(true);
Returns boolean true if the value is a primitive number or Number object; false otherwise.
Meta
* since: 1.0.0
#### isString
* See: Types.isPrimitive
* See: Types.isObject
* See: Types.isTypeOf
Determines whether the value is a primitive string or String object.
##### Parameters
* value any The value to check.
##### Examples
String values
`javascript`
// returns true
isString("1");
isString(new String("abc"));
Non-string values
`javascript`
// returns false
isString(1);
isString(["a", "b"]);
Returns boolean true if the value is a primitive string or String object; false otherwise.
Meta
* since: 1.0.0
#### isSymbol
* See: Symbol
Determines whether the value is a primitive Symbol.
##### Parameters
* value any The value to check.
##### Examples
Symbol values
`javascript`
// returns true
isSymbol(Symbol("abc"));
Non-Symbol values
`javascript`
// returns false
isSymbol("abc");
isSymbol(/[a-z]/);
Returns boolean true if the value is a primitive Symbol; false otherwise.
Meta
* since: 1.0.0
#### isBigInt
* See: BigInt
Determines whether the value is a primitive BigInt.
##### Parameters
* value any The value to check.
##### Examples
BigInt values
`javascript`
// returns true
isBigInt(BigInt(1));
isBigInt(BigInt(-1234567890));
Non-BigInt values
`javascript`
// returns false
isBigInt(Number.MAX_VALUE);
isBigInt(Infinity);
isBigInt(NaN);
isBigInt("1n");
Returns boolean true if the value is a primitive BigInt; false otherwise.
Meta
* since: 1.0.0
#### isPrimitive
Determines whether the value is a primitive value.
##### Parameters
* value any The value to check.
##### Examples
Primitive values
`javascript`
// returns true
isPrimitive(undefined);
isPrimitive(null);
isPrimitive(false);
isPrimitive(0);
isPrimitive("abc");
isPrimitive(Symbol("abc"));
isPrimitive(BigInt(1234567890));
Non-primitive values
`javascript`
// returns false
isPrimitive(new Number(1));
isPrimitive([1, 2, 3]);
isPrimitive(function () {});
Returns boolean true if the value is a primitive value; false otherwise.
Meta
* since: 1.0.0
#### isNullish
* See: undefined
* See: null
Determines whether the value is null or undefined.
##### Parameters
* value any The value to check.
##### Examples
Nullish values
`javascript`
// returns true
isNullish();
isNullish(undefined);
isNullish(void 0);
Non-nullish values
`javascript`
// returns false
isNullish(null);
isNullish(false);
isNullish(0);
isNullish("");
isNullish([]);
isNullish(NaN);
Returns boolean true if the value is null or undefined; false otherwise.
Meta
* since: 1.0.0
#### isEmpty
Determines whether the value is an empty value which can be one of the following:
* null
* undefined
* A string whose length is zero
* An array with no elements
* A plain object with no enumerable keys
* An iterable with no iterable values
##### Parameters
* value any The value to check.
##### Examples
Empty values
`javascript`
// returns true
isEmpty(null);
isEmpty(undefined);
isEmpty("");
isEmpty([]);
isEmpty({});
isEmpty(new Set());
Non-empty values
`javascript`
// returns false
isEmpty(" ");
isEmpty(0);
isEmpty(false);
isEmpty([null]);
isEmpty({a: ""});
isEmpty(NaN);
Returns boolean true if the value is an empty value; false otherwise.
Meta
* since: 1.0.0
#### isBlank
Determines whether the value is a blank value which can be one of the following:
* null
* undefined
* A string whose length is zero or has only space characters
* An array that has no elements or has only nullish values
* A plain object that has no enumerable keys or has only nullish values
* An iterable that has no iterable values or has only nullish values.
##### Parameters
* value any The value to check.
##### Examples
Blank values
`javascript`
// returns true
isBlank(null);
isBlank(undefined);
isBlank(" \t\n ");
isBlank([undefined, null]);
isBlank({a: null, b: undefined});
isBlank(new Set(null));
Non-blank values
`javascript`
// returns false
isBlank(0);
isBlank(false);
isBlank(" a ");
isBlank([""]);
isBlank({a: ""});
isBlank(NaN);
Returns boolean true if the value is a blank value; false otherwise.
Meta
* since: 1.0.0
#### isTruthy
Determines whether the value is a truthy value.
A truthy value is a value that is considered true when encountered in a Boolean context.
All values are truthy except false, 0, "", undefined, null and NaN.
##### Parameters
* value any The value to check.
##### Examples
Truthy values
`javascript`
// returns true
isTruthy(true);
isTruthy(1);
isTruthy("false");
isTruthy(new Boolean(false));
isTruthy({});
Non-truthy values
`javascript`
// returns false
isTruthy(false);
isTruthy(0);
isTruthy("");
isTruthy(undefined);
isTruthy(null);
isTruthy(NaN);
Returns boolean true if the value is a truthy value; false otherwise.
Meta
* since: 1.0.0
#### isFalsy
Determines whether the value is a falsy value which can be one of the following:
* false
* 0
* ""
* undefined
* null
* NaN
##### Parameters
* value any The value to check.
##### Examples
Falsy values
`javascript`
// returns true
isFalsy(false);
isFalsy(0);
isFalsy("");
isFalsy(undefined);
isFalsy(null);
isFalsy(NaN);
Non-falsy values
`javascript`
// returns false
isFalsy(true);
isFalsy(-1);
isFalsy("false");
isFalsy(new Boolean(false));
isFalsy({});
Returns boolean true if the value is a falsy value; false otherwise.
Meta
* since: 1.0.0
#### isTypeOf
Determines whether the value has a specified type.
Based on the type of the type value, it will check the following:
* string - checks if the type matches (case-sensitive) using the typeof operator.
* function - checks if the value is an instance of the function/class using the instanceof operator; if the test returns false, it checks if the function returns a truthy value when invoked with the value.
* null/undefined - checks if the value is equal to the type using the strict equality (===) operator.
* array - checks if the value has any type defined in the array.
##### Parameters
* value any The value to check.type
* (string | Function | null | undefined | Array) The expected type
##### Examples
Matching type values
`javascript`
// returns true
isTypeOf(1, "number");
isTypeOf({a: 1}, Object);
isTypeOf("abc", ["string", undefined]);
Non-matching type values
`javascript`
// returns false
isTypeOf(1, "boolean");
isTypeOf("", String);
isTypeOf(null, ["string", String]);
Returns boolean true if the value is of the type; false otherwise.
Meta
* since: 1.0.0
#### isInteger
Determines whether the value is an integer (a primitive number or Number object).
##### Parameters
* value any The value to check.
##### Examples
Integer values
`javascript`
// returns true
isInteger(1);
isInteger(new Number(1));
Non-integer values
`javascript`
// returns false
isInteger(isInteger(0.1));
isInteger("1");
isInteger(Infinity);
isInteger(NaN);
Returns boolean true if the value is an integer; false otherwise.
Meta
* since: 1.0.0
#### isFloat
Determines whether the value is a finite number with a decimal point (a primitive number or Number object).
##### Parameters
* value any The value to check.
##### Examples
Float values
`javascript`
// returns true
isFloat(0.1);
isFloat(-1234.56789);
isFloat(new Number(0.1));
Non-float values
`javascript`
// returns false
isFloat(1);
isFloat(1.0);
isFloat("1.2");
Returns boolean true if the value is a finite number with a decimal point; false otherwise.
Meta
* since: 1.0.0
#### isFinite
* See: isFinite
Determines whether the value is a finite number (a primitive number or Number object).
##### Parameters
* value any The value to check.
##### Examples
Finite values
`javascript`
// returns true
isFinite(0);
isFinite(-0.1);
isFinite(Number.MAX_VALUE);
Non-finite values
`javascript`
// returns false
isFinite(Infinity);
isFinite("1");
isFinite(NaN);
Returns boolean true if the value is a finite number; false otherwise.
Meta
* since: 1.0.0
#### isInfinite
* See: isFinite
Determines whether the value is a primitive number or Number object that represents positive or negative infinity.
##### Parameters
* value any The value to check.
##### Examples
Infinite values
`javascript`
// returns true
isInfinite(Infinity);
isInfinite(Number.NEGATIVE_INFINITY);
Non-infinite values
`javascript`
// returns false
isInfinite(Number.MAX_VALUE);
isInfinite(NaN);
Returns boolean true if the value is a number that represents positive or negative infinity; false otherwise.
Meta
* since: 1.0.0
#### isNaN
* See: Number.isNaN
Determines whether the value is NaN (a primitive number or a Number object).
NaN is the only value in javascript that is not equal to itself.
##### Parameters
* value any The value to check.
##### Examples
NaN values
`javascript`
// returns true
isNaN(NaN);
isNaN(new Number(NaN));
isNaN(0/0);
Non-NaN values
`javascript`
// returns false
isNaN(undefined);
isNaN(null);
isNaN("NaN");
isNaN(Infinity);
Returns boolean true if the value is NaN; false otherwise.
Meta
* since: 1.0.0
#### isNumeric
Determines whether the value is a numeric value which can be one of the following:
* A primitive number or Number object that has a finite value
* A primitive string or String object that represents a finite number
* A BigInt
##### Parameters
* value any The value to check.
##### Examples
Numeric values
`javascript`
// returns true
isNumeric(1);
isNumeric(new Number(1));
isNumeric("1.0");
isNumeric(new String("-1.234e+8"))
isNumeric(BigInt(1234567890));
isNumeric(Infinity);
Non-numeric values
`javascript`
// returns false
isNumeric(NaN);
isNumeric(Infinity);
isNumeric("12000n");
isNumeric("1*2");
Returns boolean true if the value is a numeric value; false otherwise.
Meta
* since: 1.0.0
#### isObject
Determines whether the value is an Object.
##### Parameters
* value any The value to check.
##### Examples
Object values
`javascript`
// returns true
isObject({a: 1, b: 2});
isObject(["a", "b"]);
isObject(new Object());
isObject(new Number(1));
isObject(function() {});
Non-object values
`javascript`
// returns false
isObject(null);
isObject("abc");
isObject(Symbol("abc"));
isObject(1);
isObject(BigInt(1));
Returns boolean true if the value is an Object; false otherwise.
Meta
* since: 1.0.0
#### isPlainObject
Determines whether the value is a plain object created using object literal or by the Object constructor.
##### Parameters
* value any The value to check.
##### Examples
Plain object values
`javascript`
// returns true
isPlainObject({a: 1, b: 2});
isPlainObject(new Object());
Non-plain-object values
`javascript`
// returns false
isPlainObject(null);
isPlainObject("abc");
isPlainObject([1, 2]);
isPlainObject(new Number(1));
Returns boolean true if the value is a plain object; false otherwise.
Meta
* since: 1.0.0
#### isCyclic
Determines whether the value is an cyclic object with a circular reference.
A cycle object has an enumerable property (or a sub-property) whose value points
to the object itself or a property of the object.
##### Parameters
* value any The value to check.
##### Examples
Cyclic object
`javascript
// returns true
var obj = {};
obj.ref = obj;
isCyclic(obj);
`
Non-cyclic values
`javascript`
// returns false
isCyclic({a: 1, b: 2});
isCyclic([1, 2, 3]);
isCyclic("abc");
isCyclic(function() {});
Returns boolean true if the value is a cyclic object with a circular reference; false otherwise.
Meta
* since: 1.2.0
#### isIterable
* See: Iterable
Determines whether the value is iterable which can be used in a for..of operator.
##### Parameters
* value any The value to check.
##### Examples
Iterable values
`javascript`
// returns true
isIterable([1, 2, 3]);
isIterable("abc");
isIterable(new Map());
isIterable(new Set());
isIterable({[Symbol.iterator]: function() {}});
Non-iterable values
`javascript`
// returns false
isIterable({a: 1, b: 2});
isIterable(12345);
Returns boolean true if the value is iterable; false otherwise.
Meta
* since: 1.0.0
#### isFunction
Determines whether the value is a Function object.
##### Parameters
* value any The value to check.
##### Examples
Function values
`javascript`
// returns true
isFunction(function() {});
isFunction(Object);
Non-function values
`javascript`
// returns false
isFunction(null);
isFunction(new Object());
isFunction("function() {}");
Returns boolean true if the value is a Function object; false otherwise.
Meta
* since: 1.0.0
#### isDate
* See: Date
Determines whether the value is a Date object.
##### Parameters
* value any The value to check.
##### Examples
Date values
`javascript`
// returns true
isDate(new Date());
isDate(new Date(""));
Non-date values
`javascript`
// returns false
isDate("2001-01-01T00:00:00.000Z");
isDate(978307200000);
Returns boolean true if the value is a Date object; false otherwise.
Meta
* since: 1.0.0
#### isValidDate
* See: Date
Determines whether the value is a valid Date object.
##### Parameters
* value any The value to check.
##### Examples
Valid Date objects
`javascript`
// returns true
isValidDate(new Date());
isValidDate(new Date("2001-01-01T00:00:00.000Z"));
isValidDate(new Date(-1));
Invalid Date & non-date values
`javascript`
// returns false
isValidDate(new Date(""));
isValidDate("2001-01-01T00:00:00.000Z");
isValidDate(978307200000);
Returns boolean true if the value is a valid Date object; false otherwise.
Meta
* since: 1.3.0
#### isInvalidDate
* See: Date
Determines whether the value is an invalid Date object.
##### Parameters
* value any The value to check.
##### Examples
Invalid Date objects
`javascript`
// returns true
isInvalidDate(new Date(""));
isInvalidDate(new Date(NaN));
Valid Date & non-date values
`javascript`
// returns false
isInvalidDate(new Date());
isInvalidDate("2001-01-01T00:00:00.000Z");
isInvalidDate(978307200000);
Returns boolean true if the value is an invalid Date object; false otherwise.
Meta
* since: 1.3.0
#### isRegExp
* See: RegExp
Determines whether the value is a RegExp object.
##### Parameters
* value any The value to check.
##### Examples
RegExp values
`javascript`
// returns true
isRegExp(/[a-z]/);
isRegExp(new RegExp("[a-z]"));
Non-RegExp values
`javascript`
// returns false
isRegExp("[a-z]");
isRegExp("/[a-z]/");
Returns boolean true if the value is a RegExp object; false otherwise.
Meta
* since: 1.0.0
#### isPromise
* See: Promise
Determines whether the value is a Promise object.
##### Parameters
* value any The value to check.
##### Examples
Promise values
`javascript`
// returns true
isPromise(new Promise(resolve, reject));
isPromise(Promise.resolve());
isPromise(Promise.reject());
Non-promise values
`javascript`
// returns false
isPromise({then: function() {}, catch: function() {}});
Returns boolean true if the value is a Promise object; false otherwise.
Meta
* since: 1.0.0
#### isPromiseLike
* See: Promise API Reference
Determines whether the value is an object that defines then and catch methods.
##### Parameters
* value any The value to check.
##### Examples
Promise-like objects
`javascript`
// returns true
isPromiseLike(new Promise(resolve, reject));
isPromiseLike({then: function() {}, catch: function() {}});
Non-promise-like values
`javascript`
// returns false
isPromiseLike({then: function() {}});
isPromiseLike({then: true, catch: true});
Returns boolean true if the value is a Promise-like object; false otherwise.
Meta
* since: 1.0.0
#### isThenable
Determines whether the value is an object that defines a then method.
##### Parameters
* value any The value to check.
##### Examples
Thenable objects
`javascript`
// returns true
isThenable(new Promise(resolve, reject));
isThenable({then: function() {}});
Non-thenable values
`javascript`
// returns false
isThenable(null);
isThenable({then: true});
Returns boolean true if the value is a thenable object; false otherwise.
Meta
* since: 1.1.0
#### isError
* See: Error
Determines whether the value is an Error object.
##### Parameters
* value any The value to check.
##### Examples
Error objects
`javascript`
// returns true
isError(new Error("Validation error"));
isError(new TypeError("Expected a number, but found: " + value));
Non-Error values
`javascript`
// returns false
isError(null);
isError(NaN);
isError(Promise.reject());
isError({name: "TypeError", message: "Expected a number"});
Returns boolean true if the value is an Error object; false otherwise.
Meta
* since: 1.0.0
#### isArray
Determines whether the value is an Array object.
##### Parameters
* value any The value to check.
##### Examples
Array values
`javascript`
// returns true
isArray(["a", "b"]);
isArray(new Array());
Non-array values
`javascript`
// returns false
isArray("abc");
isArray({length: 0});
isArray(new Int8Array());
Returns boolean true if the value is an Array object; false otherwise.
Meta
* since: 1.0.0
#### isArrayOf
Determines whether the value is a non-empty array and all elements in the array have the specified type.
##### Parameters
* value any The value to check.type
* (string | Function | null | undefined | Array) The type of elements
##### Examples
Matching values
`javascript`
// returns true
isArrayOf([1, 2, 3], "number");
isArrayOf(["a", "b", null], ["string", null]);
isArrayOf([{a: 1}, {b: 2}], Object);
Non-matching values
`javascript`
// returns false
isArrayOf([1, 2, "c"], "number");
isArrayOf([], undefined);
Returns boolean true if the value is a non-empty array and and all elements in the array have the specified type; false otherwise.
Meta
* since: 1.1.0
#### isArrayLike
Determines whether the value is an array-like object with a "length" property
whose value is an integer and is within 0 ~ Number.MAX\_SAFE\_INTEGER (both inclusive).
##### Parameters
* value any The value to check.
##### Examples
Array-like objects
`javascript`
// returns true
isArrayLike([]);
isArrayLike("abc");
isArrayLike({length: 0});
isArrayLike(new Int8Array());
Non-array-like values
`javascript`
// returns false
isArrayLike({});
isArrayLike({length: -1})
isArrayLike(new Set());
isArrayLike(Array);
Returns boolean true if the value is an array-like object; false otherwise.
Meta
* since: 1.0.0
#### isArrayLikeOf
Determines whether the value is a non-empty array-like object and all elements in the object have the specified type.
##### Parameters
* value any The value to check.type
* (string | Function | null | undefined | Array) The type of elements
##### Examples
Matching values
`javascript`
// returns true
isArrayLikeOf([1, 2, 3], "number");
isArrayLikeOf({0: "a", 1: "b", length: 2}, "string");
Non-matching values
`javascript`
// returns false
isArrayLikeOf([1, 2, "c"], "number");
isArrayLikeOf({a: 1, b: 2, length: 2}, "number");
Returns boolean true if the value is a non-empty array-like object and all elements in the object have the specified type; false otherwise.
Meta
* since: 1.1.0
#### isPair
Determines whether the value is an array with two elements.
##### Parameters
* value any The value to check.
##### Examples
Pair values
`javascript`
// returns true
isPair([1, 2]);
isPair([null, {}]);
Non-pair values
`javascript`
// returns false
isPair([]);
isPair({a: 1, b: 2});
isPair("ab");
Returns boolean true if the value is an array with two elements; false otherwise.
Meta
* since: 1.2.0
#### isMap
* See: Map
Determines whether the value is a Map object.
##### Parameters
* value any The value to check.
##### Examples
Map values
`javascript`
// returns true
isMap(new Map());
Non-Map values
`javascript`
// returns false
isMap(new WeakMap());
isMap({a: 1, b: 2});
Returns boolean true if the value is a Map object; false otherwise.
Meta
* since: 1.0.0
#### isSet
* See: Set
Determines whether the value is a Set object.
##### Parameters
* value any The value to check.
##### Examples
Set values
`javascript`
// returns true
isSet(new Set());
Non-Set values
`javascript`
// returns false
isSet(new WeakSet());
isSet([1, 2, 3]);
Returns boolean true if the value is a Set object; false otherwise.
Meta
* since: 1.0.0
#### isWeakMap
* See: WeakMap
Determines whether the value is a WeakMap object.
##### Parameters
* value any The value to check.
##### Examples
WeakMap values
`javascript`
// returns true
isWeakMap(new WeakMap());
Non-WeakMap values
`javascript`
// returns false
isWeakMap(new Map());
isWeakMap({a: 1, b: 2});
Returns boolean true if the value is a WeakMap object; false otherwise.
Meta
* since: 1.0.0
#### isWeakSet
* See: WeakSet
Determines whether the value is a WeakSet object.
##### Parameters
* value any The value to check.
##### Examples
WeakSet values
`javascript`
// returns true
isWeakSet(new WeakSet());
Non-WeakSet values
`javascript`
// returns false
isWeakSet(new Set());
isWeakSet([1, 2, 3]);
Returns boolean true if the value is a WeakSet object; false otherwise.
Meta
* since: 1.0.0
#### isNode
* See: Node
Determines whether the value is a DOM Node object.
##### Parameters
* value any The value to check.
##### Examples
Node objects
`javascript`
// returns true
isNode(document);
isNode(document.createElement("div"));
isNode(new DocumentFragment());
Non-Node values
`javascript`
// returns false
isNode(Node);
isNode(window);
Returns boolean true if the value is a DOM Node object; false otherwise.
Meta
* since: 1.1.0
#### isElement
* See: Element
Determines whether the value is a DOM Element object.
##### Parameters
* value any The value to check.
##### Examples
Element objects
`javascript`
// returns true
isElement(document.createElement("div"));
Non-Element values
`javascript`
// returns false
isElement(document);
isElement(window);
isElement(new DocumentFragment());
Returns boolean true if the value is a DOM Element object; false otherwise.
Meta
* since: 1.1.0
#### isFragment
* See: DocumentFragment
Determines whether the value is a DocumentFragment object.
##### Parameters
* value any The value to check.
##### Examples
DocumentFragment objects
`javascript`
// returns true
isFragment(new DocumentFragment());
Non-DocumentFragment values
`javascript``
// returns false
isFragment(document);
isFragment(window);
isFragment(document.createElement("div"));
Returns boolean true if the value is a DocumentFragment object; false otherwise.
Meta
* since: 1.1.0