type checks

is.arguments(value:any) interfaces: not, all, any Checks if the given value type is arguments. var getArguments = function() { return arguments; }; var arguments = getArguments(); is.arguments(arguments); => true is.not.arguments({foo: 'bar'}); => true is.all.arguments(arguments, 'bar'); => false is.any.arguments(['foo'], arguments); => true // 'all' and 'any' interfaces can also take array parameter is.all.arguments([arguments, 'foo', 'bar']); => false

is.array(value:any) interfaces: not, all, any Checks if the given value type is array. is.array(['foo', 'bar', 'baz']); => true is.not.array({foo: 'bar'}); => true is.all.array(['foo'], 'bar'); => false is.any.array(['foo'], 'bar'); => true // 'all' and 'any' interfaces can also take array parameter is.all.array([[1, 2], 'foo', 'bar']); => false

is.boolean(value:any) interfaces: not, all, any Checks if the given value type is boolean. is.boolean(true); => true is.not.boolean({foo: 'bar'}); => true is.all.boolean(true, 'bar'); => false is.any.boolean(true, 'bar'); => true // 'all' and 'any' interfaces can also take array parameter is.all.boolean([true, 'foo', 'bar']); => false

is.error(value:any) interfaces: not, all, any Checks if the given value type is error. is.error(new Error()); => true is.not.error({foo: 'bar'}); => true is.all.error(new Error(), 'bar'); => false is.any.error(new Error(), 'bar'); => true // 'all' and 'any' interfaces can also take array parameter is.all.error([new Error(), 'foo', 'bar']); => false

is.function(value:any) interfaces: not, all, any Checks if the given value type is function. is.function(toString); => true is.not.function({foo: 'bar'}); => true is.all.function(toString, 'bar'); => false is.any.function(toString, 'bar'); => true // 'all' and 'any' interfaces can also take array parameter is.all.function([toString, 'foo', 'bar']); => false

is.nan(value:any) interfaces: not, all, any Checks if the given value type is NaN. is.nan(NaN); => true is.not.nan(42); => true is.all.nan(NaN, 1); => false is.any.nan(NaN, 2); => true // 'all' and 'any' interfaces can also take array parameter is.all.nan([NaN, 'foo', 1]); => false

is.null(value:any) interfaces: not, all, any Checks if the given value type is null. is.null(null); => true is.not.null(42); => true is.all.null(null, 1); => false is.any.null(null, 2); => true // 'all' and 'any' interfaces can also take array parameter is.all.null([null, 'foo', 1]); => false

is.number(value:any) interfaces: not, all, any Checks if the given value type is number. is.number(42); => true is.number(NaN); => false is.not.number('42'); => true is.all.number('foo', 1); => false is.any.number({}, 2); => true // 'all' and 'any' interfaces can also take array parameter is.all.number([42, 'foo', 1]); => false

is.object(value:any) interfaces: not, all, any Checks if the given value type is object. is.object({foo: 'bar'}); => true // functions are also returnin as true is.object(toString); => true is.not.object('foo'); => true is.all.object({}, 1); => false is.any.object({}, 2); => true // 'all' and 'any' interfaces can also take array parameter is.all.object([{}, new Object()]); => true

is.json(value:any) interfaces: not, all, any Checks if the given value type is pure json object. is.json({foo: 'bar'}); => true // functions are returning as false is.json(toString); => false is.not.json([]); => true is.all.json({}, 1); => false is.any.json({}, 2); => true // 'all' and 'any' interfaces can also take array parameter is.all.json([{}, {foo: 'bar'}]); => true

is.regexp(value:any) interfaces: not, all, any Checks if the given value type is RegExp. is.regexp(/test/); => true is.not.regexp(['foo']); => true is.all.regexp(/test/, 1); => false is.any.regexp(new RegExp('ab+c'), 2); => true // 'all' and 'any' interfaces can also take array parameter is.all.regexp([{}, /test/]); => false

is.string(value:any) interfaces: not, all, any Checks if the given value type is string. is.string('foo'); => true is.not.string(['foo']); => true is.all.string('foo', 1); => false is.any.string('foo', 2); => true // 'all' and 'any' interfaces can also take array parameter is.all.string([{}, 'foo']); => false

is.char(value:any) interfaces: not, all, any Checks if the given value type is char. is.char('f'); => true is.not.char(['foo']); => true is.all.char('f', 1); => false is.any.char('f', 2); => true // 'all' and 'any' interfaces can also take array parameter is.all.char(['f', 'o', 'o']); => true

is.undefined(value:any) interfaces: not, all, any Checks if the given value type is undefined. is.undefined(undefined); => true is.not.undefined(null); => true is.all.undefined(undefined, 1); => false is.any.undefined(undefined, 2); => true // 'all' and 'any' interfaces can also take array parameter is.all.undefined([{}, undefined]); => false

is.sameType(value:any, value:any) interface: not Checks if the given value types are same. is.sameType(42, 7); => true is.sameType(42, '7'); => false is.not.sameType(42, 7); => false

presence checks

is.empty(value:object|array|string) interfaces: not, all, any Checks if the given value is empty. is.empty({}); => true is.empty([]); => true is.empty(''); => true is.not.empty(['foo']); => true is.all.empty('', {}, ['foo']); => false is.any.empty([], 42); => true // 'all' and 'any' interfaces can also take array parameter is.all.empty([{}, 'foo']); => false

is.existy(value:any) interfaces: not, all, any Checks if the given value is existy. (not null or undefined) is.existy({}); => true is.existy(null); => false is.not.existy(undefined); => true is.all.existy(null, ['foo']); => false is.any.existy(undefined, 42); => true // 'all' and 'any' interfaces can also take array parameter is.all.existy([{}, 'foo']); => true

is.truthy(value:any) interfaces: not, all, any Checks if the given value is truthy. (existy and not false) is.truthy(true); => true is.truthy(null); => false is.not.truthy(false); => true is.all.truthy(null, true); => false is.any.truthy(undefined, true); => true // 'all' and 'any' interfaces can also take array parameter is.all.truthy([{}, true]); => true

is.falsy(value:any) interfaces: not, all, any Checks if the given value is falsy. is.falsy(false); => true is.falsy(null); => true is.not.falsy(true); => true is.all.falsy(null, false); => true is.any.falsy(undefined, true); => true // 'all' and 'any' interfaces can also take array parameter is.all.falsy([false, true, undefined]); => false

is.space(value:string) interfaces: not, all, any Checks if the given value is space. is.space(' '); => true is.space('foo'); => false is.not.space(true); => true is.all.space(' ', 'foo'); => false is.any.space(' ', true); => true // 'all' and 'any' interfaces can also take array parameter is.all.space([' ', 'foo', undefined]); => false

regexp checks

is.url(value:any) interfaces: not, all, any Checks if the given value matches url regexp. is.url('http://www.test.com'); => true is.url('foo'); => false is.not.url(true); => true is.all.url('http://www.test.com', 'foo'); => false is.any.url('http://www.test.com', true); => true // 'all' and 'any' interfaces can also take array parameter is.all.url(['http://www.test.com', 'foo', undefined]); => false

is.email(value:any) interfaces: not, all, any Checks if the given value matches email regexp. is.email('test@test.com'); => true is.email('foo'); => false is.not.email('foo'); => true is.all.email('test@test.com', 'foo'); => false is.any.email('test@test.com', 'foo'); => true // 'all' and 'any' interfaces can also take array parameter is.all.email(['test@test.com', 'foo', undefined]); => false

is.creditCard(value:any) interfaces: not, all, any Checks if the given value matches credit card regexp. is.creditCard(378282246310005); => true is.creditCard(123); => false is.not.creditCard(123); => true is.all.creditCard(378282246310005, 123); => false is.any.creditCard(378282246310005, 123); => true // 'all' and 'any' interfaces can also take array parameter is.all.creditCard([378282246310005, 123, undefined]); => false

is.alphaNumeric(value:any) interfaces: not, all, any Checks if the given value matches alpha numeric regexp. is.alphaNumeric('alphaNu3er1k'); => true is.alphaNumeric('*?'); => false is.not.alphaNumeric('*?'); => true is.all.alphaNumeric('alphaNu3er1k', '*?'); => false is.any.alphaNumeric('alphaNu3er1k', '*?'); => true // 'all' and 'any' interfaces can also take array parameter is.all.alphaNumeric(['alphaNu3er1k', '*?']); => false

is.timeString(value:any) interfaces: not, all, any Checks if the given value matches time string regexp. is.timeString('13:45:30'); => true is.timeString('90:90:90'); => false is.not.timeString('90:90:90'); => true is.all.timeString('13:45:30', '90:90:90'); => false is.any.timeString('13:45:30', '90:90:90'); => true // 'all' and 'any' interfaces can also take array parameter is.all.timeString(['13:45:30', '90:90:90']); => false

is.usZipCode(value:any) interfaces: not, all, any Checks if the given value matches US zip code regexp. is.usZipCode('02201-1020'); => true is.usZipCode('123'); => false is.not.usZipCode('123'); => true is.all.usZipCode('02201-1020', '123'); => false is.any.usZipCode('02201-1020', '123'); => true // 'all' and 'any' interfaces can also take array parameter is.all.usZipCode(['02201-1020', '123']); => false

is.caPostalCode(value:any) interfaces: not, all, any Checks if the given value matches Canada postal code regexp. is.caPostalCode('L8V3Y1'); => true is.caPostalCode('123'); => false is.not.caPostalCode('123'); => true is.all.caPostalCode('L8V3Y1', '123'); => false is.any.caPostalCode('L8V3Y1', '123'); => true // 'all' and 'any' interfaces can also take array parameter is.all.caPostalCode(['L8V3Y1', '123']); => false

is.ukPostCode(value:any) interfaces: not, all, any Checks if the given value matches UK post code regexp. is.ukPostCode('B184BJ'); => true is.ukPostCode('123'); => false is.not.ukPostCode('123'); => true is.all.ukPostCode('B184BJ', '123'); => false is.any.ukPostCode('B184BJ', '123'); => true // 'all' and 'any' interfaces can also take array parameter is.all.ukPostCode(['B184BJ', '123']); => false

is.nanpPhone(value:any) interfaces: not, all, any Checks if the given value matches North American numbering plan phone regexp. is.nanpPhone('609-555-0175'); => true is.nanpPhone('123'); => false is.not.nanpPhone('123'); => true is.all.nanpPhone('609-555-0175', '123'); => false is.any.nanpPhone('609-555-0175', '123'); => true // 'all' and 'any' interfaces can also take array parameter is.all.nanpPhone(['609-555-0175', '123']); => false

is.eppPhone(value:any) interfaces: not, all, any Checks if the given value matches extensible provisioning protocol phone regexp. is.eppPhone('+90.2322456789'); => true is.eppPhone('123'); => false is.not.eppPhone('123'); => true is.all.eppPhone('+90.2322456789', '123'); => false is.any.eppPhone('+90.2322456789', '123'); => true // 'all' and 'any' interfaces can also take array parameter is.all.eppPhone(['+90.2322456789', '123']); => false

is.socialSecurityNumber(value:any) interfaces: not, all, any Checks if the given value matches social security number regexp. is.socialSecurityNumber('017-90-7890'); => true is.socialSecurityNumber('123'); => false is.not.socialSecurityNumber('123'); => true is.all.socialSecurityNumber('017-90-7890', '123'); => false is.any.socialSecurityNumber('017-90-7890', '123'); => true // 'all' and 'any' interfaces can also take array parameter is.all.socialSecurityNumber(['017-90-7890', '123']); => false

is.affirmative(value:any) interfaces: not, all, any Checks if the given value matches affirmative regexp. is.affirmative('yes'); => true is.affirmative('no'); => false is.not.affirmative('no'); => true is.all.affirmative('yes', 'no'); => false is.any.affirmative('yes', 'no'); => true // 'all' and 'any' interfaces can also take array parameter is.all.affirmative(['yes', 'y', 'true', 't', 'ok', 'okay']); => true

is.hexadecimal(value:any) interfaces: not, all, any Checks if the given value matches hexadecimal regexp. is.hexadecimal('f0f0f0'); => true is.hexadecimal(2.5); => false is.not.hexadecimal('string'); => true is.all.hexadecimal('ff', 'f50'); => true is.any.hexadecimal('ff5500', true); => true // 'all' and 'any' interfaces can also take array parameter is.all.hexadecimal(['fff', '333', 'f50']); => true

is.hexColor(value:any) interfaces: not, all, any Checks if the given value matches hexColor regexp. is.hexColor('#333'); => true is.hexColor('#3333'); => false is.not.hexColor(0.5); => true is.all.hexColor('fff', 'f50'); => true is.any.hexColor('ff5500', 0.5); => false // 'all' and 'any' interfaces can also take array parameter is.all.hexColor(['fff', '333', 'f50']); => true

is.ip(value:any) interfaces: not, all, any Checks if the given value matches ip regexp. is.ip('198.156.23.5'); => true is.ip('1.2..5'); => false is.not.ip('8:::::::7'); => true is.all.ip('0:1::4:ff5:54:987:C', '123.123.123.123'); => true is.any.ip('123.8.4.3', '0.0.0.0'); => true // 'all' and 'any' interfaces can also take array parameter is.all.ip(['123.123.23.12', 'A:B:C:D:E:F:0:0']); => true

is.ipv4(value:any) interfaces: not, all, any Checks if the given value matches ipv4 regexp. is.ipv4('198.12.3.142'); => true is.ipv4('1.2..5'); => false is.not.ipv4('8:::::::7'); => true is.all.ipv4('198.12.3.142', '123.123.123.123'); => true is.any.ipv4('255.255.255.255', '850..1.4'); => true // 'all' and 'any' interfaces can also take array parameter is.all.ipv4(['198.12.3.142', '1.2.3']); => false

is.ipv6(value:any) interfaces: not, all, any Checks if the given value matches ipv6 regexp. is.ipv6('2001:DB8:0:0:1::1'); => true is.ipv6('985.12.3.4'); => true is.not.ipv6('8:::::::7'); => true is.all.ipv6('2001:DB8:0:0:1::1', '1:50:198:2::1:2:8'); => true is.any.ipv6('255.255.255.255', '2001:DB8:0:0:1::1'); => true // 'all' and 'any' interfaces can also take array parameter is.all.ipv6(['2001:DB8:0:0:1::1', '1.2.3']); => false

string checks

is.include(value:string, value:substring) interface: not Checks if the given string contains a substring. is.include('Some text goes here', 'text'); => true is.include('test', 'text'); => false is.not.include('test', 'text'); => true

is.upperCase(value:string) interfaces: not, all, any Checks if the given string is UPPERCASE. is.upperCase('YEAP'); => true is.upperCase('nope'); => false is.not.upperCase('Nope'); => true is.all.upperCase('YEAP', 'nope'); => false is.any.upperCase('YEAP', 'nope'); => true // 'all' and 'any' interfaces can also take array parameter is.all.upperCase(['YEAP', 'ALL UPPERCASE']); => true

is.lowerCase(value:string) interfaces: not, all, any Checks if the given string is lowercase. is.lowerCase('yeap'); => true is.lowerCase('NOPE'); => false is.not.lowerCase('Nope'); => true is.all.lowerCase('yeap', 'NOPE'); => false is.any.lowerCase('yeap', 'NOPE'); => true // 'all' and 'any' interfaces can also take array parameter is.all.lowerCase(['yeap', 'all lowercase']); => true

is.startWith(value:string, value:substring) interface: not Checks if the given string starts with substring. is.startWith('yeap', 'ye'); => true is.startWith('nope', 'ye'); => false is.not.startWith('nope not that', 'not'); => true

is.endWith(value:string, value:substring) interfaces: not Checks if the given string ends with substring. is.endWith('yeap', 'ap'); => true is.endWith('nope', 'no'); => false is.not.endWith('nope not that', 'not'); => true is.endWith('yeap that one', 'one'); => true

is.capitalized(value:string) interfaces: not, all, any Checks if the given string is capitalized. is.capitalized('Yeap'); => true is.capitalized('nope'); => false is.not.capitalized('nope not capitalized'); => true is.capitalized('Yeap Capitalized'); => true is.all.capitalized('Yeap', 'All', 'Capitalized'); => true is.any.capitalized('Yeap', 'some', 'Capitalized'); => true // 'all' and 'any' interfaces can also take array parameter is.all.capitalized(['Nope', 'not']); => false

is.palindrome(value:string) interfaces: not, all, any Checks if the given string is palindrome. is.palindrome('testset'); => true is.palindrome('nope'); => false is.not.palindrome('nope not palindrome'); => true is.not.palindrome('tt'); => false is.all.palindrome('testset', 'tt'); => true is.any.palindrome('Yeap', 'some', 'testset'); => true // 'all' and 'any' interfaces can also take array parameter is.all.palindrome(['Nope', 'testset']); => false

arithmetic checks

is.equal(value:any, value:any) interfaces: not Checks if the given values are equal. is.equal(42, 40 + 2); => true is.equal('yeap', 'yeap'); => true is.equal(true, true); => true is.not.equal('yeap', 'nope'); => true

is.even(value:number) interfaces: not, all, any Checks if the given value is even. is.even(42); => true is.not.even(41); => true is.all.even(40, 42, 44); => true is.any.even(39, 42, 43); => true // 'all' and 'any' interfaces can also take array parameter is.all.even([40, 42, 43]); => false

is.odd(value:number) interfaces: not, all, any Checks if the given value is odd. is.odd(41); => true is.not.odd(42); => true is.all.odd(39, 41, 43); => true is.any.odd(39, 42, 44); => true // 'all' and 'any' interfaces can also take array parameter is.all.odd([40, 42, 43]); => false

is.positive(value:number) interfaces: not, all, any Checks if the given value is positive. is.positive(41); => true is.not.positive(-42); => true is.all.positive(39, 41, 43); => true is.any.positive(-39, 42, -44); => true // 'all' and 'any' interfaces can also take array parameter is.all.positive([40, 42, -43]); => false

is.negative(value:number) interfaces: not, all, any Checks if the given value is negative. is.negative(-41); => true is.not.negative(42); => true is.all.negative(-39, -41, -43); => true is.any.negative(-39, 42, 44); => true // 'all' and 'any' interfaces can also take array parameter is.all.negative([40, 42, -43]); => false

is.above(value:number, min) interface: not Checks if the given value is above minimum value. is.above(41, 30); => true is.not.above(42, 50); => true

is.under(value:number, max) interface: not Checks if the given value is under maximum value. is.under(30, 35); => true is.not.under(42, 30); => true

is.within(value:number, min, max) interface: not Checks if the given value is within minimum and maximum values. is.within(30, 20, 40); => true is.not.within(40, 30, 35); => true

is.decimal(value:number) interfaces: not, all, any Checks if the given value is decimal. is.decimal(41.5); => true is.not.decimal(42); => true is.all.decimal(39.5, 41.5, -43.5); => true is.any.decimal(-39, 42.5, 44); => true // 'all' and 'any' interfaces can also take array parameter is.all.decimal([40, 42.5, -43]); => false

is.integer(value:number) interfaces: not, all, any Checks if the given value is integer. is.integer(41); => true is.not.integer(42.5); => true is.all.integer(39, 41, -43); => true is.any.integer(-39, 42.5, 44); => true // 'all' and 'any' interfaces can also take array parameter is.all.integer([40, 42.5, -43]); => false

is.finite(value:number) interfaces: not, all, any Checks if the given value is finite. is.finite(41); => true is.not.finite(42 / 0); => true is.all.finite(39, 41, -43); => true is.any.finite(-39, Infinity, 44); => true // 'all' and 'any' interfaces can also take array parameter is.all.finite([Infinity, -Infinity, 42.5]); => false

is.infinite(value:number) interfaces: not, all, any Checks if the given value is infinite. is.infinite(Infinity); => true is.not.infinite(42); => true is.all.infinite(Infinity, -Infinity, -43 / 0); => true is.any.infinite(-39, Infinity, 44); => true // 'all' and 'any' interfaces can also take array parameter is.all.infinite([Infinity, -Infinity, 42.5]); => false

object checks

is.propertyCount(value:object, count) interface: not Checks if the objects' property count is equal to given count. is.propertyCount({this: 'is', 'sample': object}, 2); => true is.propertyCount({this: 'is', 'sample': object}, 3); => false is.not.propertyCount({}, 2); => true

is.propertyDefined(value:object, property) interface: not Checks if the given property is defined on object. is.propertyDefined({yeap: 'yeap'}, 'yeap'); => true is.propertyDefined({yeap: 'yeap'}, 'nope'); => false is.not.propertyDefined({}, 'nope'); => true

is.windowObject(value:window) interface: not, all, any Checks if the given object is window object. is.windowObject(window); => true is.windowObject({nope: 'nope'}); => false is.not.windowObject({}); => true is.all.windowObject(window, {nope: 'nope'}); => false is.any.windowObject(window, {nope: 'nope'}); => true // 'all' and 'any' interfaces can also take array parameter is.all.windowObject([window, {nope: 'nope'}]); => false

is.domNode(value:object) interface: not, all, any Checks if the given object is a dom node. var obj = document.createElement('div'); is.domNode(obj); => true is.domNode({nope: 'nope'}); => false is.not.domNode({}); => true is.all.domNode(obj, obj); => true is.any.domNode(obj, {nope: 'nope'}); => true // 'all' and 'any' interfaces can also take array parameter is.all.domNode([obj, {nope: 'nope'}]); => false

array check

is.inArray(value:array) interface: not Checks if the given item is in array. is.inArray(2, [1, 2, 3]); => true is.inArray(4, [1, 2, 3]); => false is.not.inArray(4, [1, 2, 3]); => true

is.sorted(value:array) interfaces: not, all, any Checks if the given array is sorted. is.sorted([1, 2, 3]); => true is.sorted([1, 2, 4, 3]); => false is.not.sorted([5, 4, 3]); => true is.all.sorted([1, 2], [3, 4]); => true is.any.sorted([1, 2], [5, 4]); => true // 'all' and 'any' interfaces can also take array parameter is.all.sorted([[1, 2], [5, 4]]); => false

environment checks

Environment checks are not available as node module.

is.ie(value:number) interface: not Checks if the current browser is ie. Parameter is optional version number of browser. is.ie(); => true if current browser is ie is.ie(6); => hopefully false is.not.ie(); => false if current browser is ie

is.edge() interface: not Checks if the current browser is edge. is.edge(); => true if current browser is edge is.not.edge(); => false if current browser is edge

is.chrome() interface: not Checks if the current browser is chrome. is.chrome(); => true if current browser is chrome is.not.chrome(); => false if current browser is chrome

is.firefox() interface: not Checks if the current browser is firefox. is.firefox(); => true if current browser is firefox is.not.firefox(); => false if current browser is firefox

is.opera() interface: not Checks if the current browser is opera. is.opera(); => true if current browser is opera is.not.opera(); => false if current browser is opera

is.safari() interface: not Checks if the current browser is safari. is.safari(); => true if current browser is safari is.not.safari(); => false if current browser is safari

is.ios() interface: not Checks if the current device has ios. is.ios(); => true if current device is iPhone, iPad or iPod is.not.ios(); => true if current device is not iPhone, iPad or iPod

is.iphone() interface: not Checks if the current device is iPhone. is.iphone(); => true if current device is iPhone is.not.iphone(); => true if current device is not iPhone

is.ipad() interface: not Checks if the current device is iPad. is.ipad(); => true if current device is iPad is.not.ipad(); => true if current device is not iPad

is.ipod() interface: not Checks if the current device is iPod. is.ipod(); => true if current device is iPod is.not.ipod(); => true if current device is not iPod

is.android() interface: not Checks if the current device has Android. is.android(); => true if current device has Android OS is.not.android(); => true if current device has not Android OS

is.androidPhone() interface: not Checks if the current device is Android phone. is.androidPhone(); => true if current device is Android phone is.not.androidPhone(); => true if current device is not Android phone

is.androidTablet() interface: not Checks if the current device is Android tablet. is.androidTablet(); => true if current device is Android tablet is.not.androidTablet(); => true if current device is not Android tablet

is.blackberry() interface: not Checks if the current device is Blackberry. is.blackberry(); => true if current device is Blackberry is.not.blackberry(); => true if current device is not Blackberry

is.windowsPhone() interface: not Checks if the current device is Windows phone. is.windowsPhone(); => true if current device is Windows phone is.not.windowsPhone(); => true if current device is not Windows Phone

is.windowsTablet() interface: not Checks if the current device is Windows tablet. is.windowsTablet(); => true if current device is Windows tablet is.not.windowsTablet(); => true if current device is not Windows tablet

is.windows() interface: not Checks if the current OS is Windows. is.windows(); => true if current OS is Windows is.not.windows(); => true if current OS is not Windows

is.mac() interface: not Checks if the current OS is Mac OS X. is.mac(); => true if current OS is Mac OS X is.not.mac(); => true if current OS is not Mac OS X

is.linux() interface: not Checks if the current OS is linux. is.linux(); => true if current OS is linux is.not.linux(); => true if current OS is not linux

is.desktop() interface: not Checks if the current device is desktop. is.desktop(); => true if current device is desktop is.not.desktop(); => true if current device is not desktop

is.mobile() interface: not Checks if the current device is mobile.

iPhone, iPod, Android Phone, Windows Phone, Blackberry. is.mobile(); => true if current device is mobile is.not.mobile(); => true if current device is not mobile

is.tablet() interface: not Checks if the current device is tablet.

iPad, Android Tablet, Windows Tablet is.tablet(); => true if current device is tablet is.not.tablet(); => true if current device is not tablet

is.online() interface: not Checks if the current device is online. is.online(); => true if current device is online is.not.online(); => true if current device is not online

is.offline() interface: not Checks if the current device is offline. is.offline(); => true if current device is offline is.not.offline(); => true if current device is not offline

is.touchDevice() interface: not Checks if the current device supports touch. is.touchDevice(); => true if current device supports touch is.not.touchDevice(); => true if current device doesn't support touch

time checks

is.today(value:object) interfaces: not, all, any Checks if the given date object indicate today. var today = new Date(); is.today(today); => true var yesterday = new Date(new Date().setDate(new Date().getDate() - 1)); is.today(yesterday); => false is.not.today(yesterday); => true is.all.today(today, today); => true is.any.today(today, yesterday); => true // 'all' and 'any' interfaces can also take array parameter is.all.today([today, yesterday]); => false

is.yesterday(value:object) interfaces: not, all, any Checks if the given date object indicate yesterday. var today = new Date(); is.yesterday(today); => false var yesterday = new Date(new Date().setDate(new Date().getDate() - 1)); is.yesterday(yesterday); => true is.not.yesterday(today); => true is.all.yesterday(yesterday, today); => false is.any.yesterday(today, yesterday); => true // 'all' and 'any' interfaces can also take array parameter is.all.yesterday([today, yesterday]); => false

is.tomorrow(value:object) interfaces: not, all, any Checks if the given date object indicate tomorrow. var today = new Date(); is.tomorrow(today); => false var tomorrow = new Date(new Date().setDate(new Date().getDate() + 1)); is.tomorrow(tomorrow); => true is.not.tomorrow(today); => true is.all.tomorrow(tomorrow, today); => false is.any.tomorrow(today, tomorrow); => true // 'all' and 'any' interfaces can also take array parameter is.all.tomorrow([today, tomorrow]); => false

is.past(value:object) interfaces: not, all, any Checks if the given date object indicate past. var yesterday = new Date(new Date().setDate(new Date().getDate() - 1)); var tomorrow = new Date(new Date().setDate(new Date().getDate() + 1)); is.past(yesterday); => true is.past(tomorrow); => false is.not.past(tomorrow); => true is.all.past(tomorrow, yesterday); => false is.any.past(yesterday, tomorrow); => true // 'all' and 'any' interfaces can also take array parameter is.all.past([yesterday, tomorrow]); => false

is.future(value:object) interfaces: not, all, any Checks if the given date object indicate future. var yesterday = new Date(new Date().setDate(new Date().getDate() - 1)); var tomorrow = new Date(new Date().setDate(new Date().getDate() + 1)); is.future(yesterday); => false is.future(tomorrow); => true is.not.future(yesterday); => true is.all.future(tomorrow, yesterday); => false is.any.future(yesterday, tomorrow); => true // 'all' and 'any' interfaces can also take array parameter is.all.future([yesterday, tomorrow]); => false

is.day(value:object, dayString) interface: not Checks if the given date objects' day equal given dayString parameter. var mondayObj = new Date('01/26/2015'); var tuesdayObj = new Date('01/27/2015'); is.day(mondayObj, 'monday'); => true is.day(mondayObj, 'tuesday'); => false is.not.day(mondayObj, 'tuesday'); => true

is.month(value:object, monthString) interface: not Checks if the given date objects' month equal given monthString parameter. var januaryObj = new Date('01/26/2015'); var februaryObj = new Date('02/26/2015'); is.month(januaryObj, 'january'); => true is.month(februaryObj, 'january'); => false is.not.month(februaryObj, 'january'); => true

is.year(value:object, yearNumber) interface: not Checks if the given date objects' year equal given yearNumber parameter. var year2015 = new Date('01/26/2015'); var year2016 = new Date('01/26/2016'); is.year(year2015, 2015); => true is.year(year2016, 2015); => false is.not.year(year2016, 2015); => true

is.leapYear(value:number) interfaces: not, all, any Checks if the given year number is leapYear. is.leapYear(2016); => true is.leapYear(2015); => false is.not.leapYear(2015); => true is.all.leapYear(2015, 2016); => false is.any.leapYear(2015, 2016); => true // 'all' and 'any' interfaces can also take array parameter is.all.leapYear([2016, 2080]); => true

is.weekend(value:object) interfaces: not, all, any Checks if the given date objects' day is weekend. var monday = new Date('01/26/2015'); var sunday = new Date('01/25/2015'); var saturday = new Date('01/24/2015'); is.weekend(sunday); => true is.weekend(monday); => false is.not.weekend(monday); => true is.all.weekend(sunday, saturday); => true is.any.weekend(sunday, saturday, monday); => true // 'all' and 'any' interfaces can also take array parameter is.all.weekend([sunday, saturday, monday]); => false

is.weekday(value:object) interfaces: not, all, any Checks if the given date objects' day is weekday. var monday = new Date('01/26/2015'); var sunday = new Date('01/25/2015'); var saturday = new Date('01/24/2015'); is.weekday(monday); => true is.weekday(sunday); => false is.not.weekday(sunday); => true is.all.weekday(monday, saturday); => false is.any.weekday(sunday, saturday, monday); => true // 'all' and 'any' interfaces can also take array parameter is.all.weekday([sunday, saturday, monday]); => false

is.inLastWeek(value:object) interface: not Checks if the given date is between now and 7 days ago. var twoDaysAgo = new Date(new Date().setDate(new Date().getDate() - 2)); var nineDaysAgo = new Date(new Date().setDate(new Date().getDate() - 9)); is.inLastWeek(twoDaysAgo); => true is.inLastWeek(nineDaysAgo); => false is.not.inLastWeek(nineDaysAgo); => true

is.inLastMonth(value:object) interface: not Checks if the given date is between now and a month ago. var tenDaysAgo = new Date(new Date().setDate(new Date().getDate() - 10)); var fortyDaysAgo = new Date(new Date().setDate(new Date().getDate() - 40)); is.inLastMonth(tenDaysAgo); => true is.inLastMonth(fortyDaysAgo); => false is.not.inLastMonth(fortyDaysAgo); => true

is.inLastYear(value:object) interface: not Checks if the given date is between now and a year ago. var twoMonthsAgo = new Date(new Date().setMonth(new Date().getMonth() - 2)); var thirteenMonthsAgo = new Date(new Date().setMonth(new Date().getMonth() - 13)); is.inLastYear(twoMonthsAgo); => true is.inLastYear(thirteenMonthsAgo); => false is.not.inLastYear(thirteenMonthsAgo); => true

is.inNextWeek(value:object) interface: not Checks if the given date is between now and 7 days later. var twoDaysLater = new Date(new Date().setDate(new Date().getDate() + 2)); var nineDaysLater = new Date(new Date().setDate(new Date().getDate() + 9)); is.inNextWeek(twoDaysLater); => true is.inNextWeek(nineDaysLater); => false is.not.inNextWeek(nineDaysLater); => true

is.inNextMonth(value:object) interface: not Checks if the given date is between now and a month later. var tenDaysLater = new Date(new Date().setDate(new Date().getDate() + 10)); var fortyDaysLater = new Date(new Date().setDate(new Date().getDate() + 40)); is.inNextMonth(tenDaysLater); => true is.inNextMonth(fortyDaysLater); => false is.not.inNextMonth(fortyDaysLater); => true

is.inNextYear(value:object) interface: not Checks if the given date is between now and a year later. var twoMonthsLater = new Date(new Date().setMonth(new Date().getMonth() + 2)); var thirteenMonthsLater = new Date(new Date().setMonth(new Date().getMonth() + 13)); is.inNextYear(twoMonthsLater); => true is.inNextYear(thirteenMonthsLater); => false is.not.inNextYear(thirteenMonthsLater); => true

is.quarterOfYear(value:object, quarterNumber) interface: not Checks if the given date is in the parameter quarter. var firstQuarter = new Date('01/26/2015'); var secondQuarter = new Date('05/26/2015'); is.quarterOfYear(firstQuarter, 1); => true is.quarterOfYear(secondQuarter, 1); => false is.not.quarterOfYear(secondQuarter, 1); => true

is.dayLightSavingTime(value:object, quarterNumber) interface: not Checks if the given date is in daylight saving time. // For Turkey Time Zone var january1 = new Date('01/01/2015'); var june1 = new Date('06/01/2015'); is.dayLightSavingTime(june1); => true is.dayLightSavingTime(january1); => false is.not.dayLightSavingTime(january1); => true

configuration methods

is.setRegexp(value:RegExp, regexpString) Override RegExps if you think they suck. is.url('https://www.duckduckgo.com'); => true is.setRegexp(/quack/, 'url'); is.url('quack'); => true