is.js alternatives and similar libraries
Based on the "Validation" category.
Alternatively, view is.js alternatives based on common mentions on social networks and blogs.
-
Parsley.js
Validate your forms, frontend, without writing a single line of javascript -
FormValidation
The best @jquery plugin to validate form fields. Designed to use with Bootstrap + Zurb Foundation + Pure + SemanticUI + UIKit + Your own frameworks. -
jQuery.validationEngine v2.6.2
jQuery form validation plugin -
Validator, for Bootstrap 3
A user-friendly HTML5 form validation jQuery plugin for Bootstrap 3 -
validate.js
Lightweight JavaScript form validation library inspired by CodeIgniter. -
BootstrapValidator
For anyone who want to use the previous version (BootstrapValidator) -
FieldVal
multipurpose validation library. Supports both sync and async validation. -
rdf-validate-shacl
Validate RDF data purely in JavaScript. An implementation of the W3C SHACL specification on top of the RDFJS stack.
SurveyJS - Open-Source JSON Form Builder to Create Dynamic Forms Right in Your App
* Code Quality Rankings and insights are calculated and provided by Lumnify.
They vary from L1 to L5 with "L5" being the highest.
Do you think we are missing an alternative of is.js or a related project?
README
is.js
This is a general-purpose check library.
- No dependencies
- AMD, Node & browser ready
Usage:
Node.js:
npm install is_js
Bower:
bower install is_js
Build:
npm run build
Test:
npm test
Contributing:
Thanks for considering to contribute. Check [here](CONTRIBUTING.md)
Contributors:
Many thanks to our contributors: https://github.com/arasatasaygin/is.js/graphs/contributors
Type checks
is.arguments(value:any)
Checks if the given value type is arguments.
interfaces: not, all, any
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)
Checks if the given value type is array.
interfaces: not, all, any
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)
Checks if the given value type is boolean.
interfaces: not, all, any
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.date(value:any)
Checks if the given value type is date.
interfaces: not, all, any
is.date(new Date());
=> true
is.not.date({foo: 'bar'});
=> true
is.all.date(new Date(), 'bar');
=> false
is.any.date(new Date(), 'bar');
=> true
// 'all' and 'any' interfaces can also take array parameter
is.all.date([new Date(), 'foo', 'bar']);
=> false
is.domNode(value:any)
Checks if the given object is a dom node.
interfaces: not, all, any
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
is.error(value:any)
Checks if the given value type is error.
interfaces: not, all, any
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)
Checks if the given value type is function.
interfaces: not, all, any
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)
Checks if the given value type is NaN.
interfaces: not, all, any
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)
Checks if the given value type is null.
interfaces: not, all, any
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)
Checks if the given value type is number.
interfaces: not, all, any
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)
Checks if the given value type is object.
interfaces: not, all, any
is.object({foo: 'bar'});
=> true
// functions are also returning 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)
Checks if the given value type is pure json object.
interfaces: not, all, any
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)
Checks if the given value type is RegExp.
interfaces: not, all, any
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)
Checks if the given value type is string.
interfaces: not, all, any
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)
Checks if the given value type is char.
interfaces: not, all, any
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)
Checks if the given value type is undefined.
interfaces: not, all, any
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, other:any)
Checks if the given value types are same type.
interface: not
is.sameType(42, 7);
=> true
is.sameType(42, '7');
=> false
is.not.sameType(42, 7);
=> false
is.windowObject(value:any)
Checks if the given object is window object.
interfaces: not, all, any
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
Presence checks
is.empty(value:array|object|string)
Checks if the given value is empty.
interfaces: not, all, any
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)
Checks if the given value is existy. (not null or undefined)
interfaces: not, all, any
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)
Checks if the given value is truthy. (existy and not false)
interfaces: not, all, any
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)
Checks if the given value is falsy.
interfaces: not, all, any
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:any)
Checks if the given value is space.
interfaces: not, all, any
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)
Checks if the given value matches url regexp.
interfaces: not, all, any
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)
Checks if the given value matches email regexp.
interfaces: not, all, any
is.email('[email protected]');
=> true
is.email('foo');
=> false
is.not.email('foo');
=> true
is.all.email('[email protected]', 'foo');
=> false
is.any.email('[email protected]', 'foo');
=> true
// 'all' and 'any' interfaces can also take array parameter
is.all.email(['[email protected]', 'foo', undefined]);
=> false
is.creditCard(value:any)
Checks if the given value matches credit card regexp.
interfaces: not, all, any
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)
Checks if the given value matches alpha numeric regexp.
interfaces: not, all, any
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)
Checks if the given value matches time string regexp.
interfaces: not, all, any
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.dateString(value:any)
Checks if the given value matches date string regexp.
interfaces: not, all, any
is.dateString('11/11/2011');
=> true
is.dateString('10-21-2012');
=> true
is.dateString('90/11/2011');
=> false
is.not.dateString('90/11/2011');
=> true
is.all.dateString('11/11/2011', '90/11/2011');
=> false
is.any.dateString('11-11-2011', '90/11/2011');
=> true
// 'all' and 'any' interfaces can also take array parameter
is.all.dateString(['11/11/2011', '90/11/2011']);
=> false
is.usZipCode(value:any)
Checks if the given value matches US zip code regexp.
interfaces: not, all, any
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)
Checks if the given value matches Canada postal code regexp.
interfaces: not, all, any
is.caPostalCode('L8V3Y1');
=> true
is.caPostalCode('L8V 3Y1');
=> 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)
Checks if the given value matches UK post code regexp.
interfaces: not, all, any
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)
Checks if the given value matches North American numbering plan phone regexp.
interfaces: not, all, any
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)
Checks if the given value matches extensible provisioning protocol phone regexp.
interfaces: not, all, any
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)
Checks if the given value matches social security number regexp.
interfaces: not, all, any
is.socialSecurityNumber('017-90-7890');
=> true
is.socialSecurityNumber('017907890');
=> true
is.socialSecurityNumber('123');
=> false
is.not.socialSecurityNumber('123');
=> true
is.all.socialSecurityNumber('017-90-7890', '123');
=> false
is.any.socialSecurityNumber('017907890', '123');
=> true
// 'all' and 'any' interfaces can also take array parameter
is.all.socialSecurityNumber(['017-90-7890', '123']);
=> false
is.affirmative(value:any)
Checks if the given value matches affirmative regexp.
interfaces: not, all, any
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)
Checks if the given value matches hexadecimal regexp.
interfaces: not, all, any
is.hexadecimal('f0f0f0');
=> true
is.hexadecimal('0xf0f0f0');
=> true
is.hexadecimal(2.5);
=> false
is.not.hexadecimal('string');
=> true
is.all.hexadecimal('ff', 'f50');
=> true
is.any.hexadecimal('0xff5500', true);
=> true
// 'all' and 'any' interfaces can also take array parameter
is.all.hexadecimal(['fff', '333', 'f50']);
=> true
is.hexColor(value:any)
Checks if the given value matches hexcolor regexp.
interfaces: not, all, any
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)
Checks if the given value matches ip regexp
interfaces: not, all, any
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)
Checks if the given value matches ipv4 regexp
interfaces: not, all, any
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)
Checks if the given value matches ipv6 regexp
interfaces: not, all, any
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, target:string)
Checks if the given string contains a substring.
interface: not
is.include('Some text goes here', 'text');
=> true
is.include('test', 'text');
=> false
is.not.include('test', 'text');
=> true
is.upperCase(value:string)
Checks if the given string is UPPERCASE.
interfaces: not, all, any
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)
Checks if the given string is lowercase.
interfaces: not, all, any
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, target:string)
Checks if the given string starts with substring.
interface: not
is.startWith('yeap', 'ye');
=> true
is.startWith('nope', 'ye');
=> false
is.not.startWith('nope not that', 'not');
=> true
is.endWith(value:string, target:string)
Checks if the given string ends with substring.
interfaces: not
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)
Checks if the given string is capitalized.
interfaces: not, all, any
is.capitalized('Yeap');
=> true
is.capitalized('nope');
=> false
is.not.capitalized('nope not capitalized');
=> true
is.not.capitalized('nope 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)
Checks if the given string is palindrome.
interfaces: not, all, any
is.palindrome('testset');
=> true
is.palindrome('A man, a plan, a canal - Panama!');
=> 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, other:any)
Checks if the given values are equal.
interfaces: not
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)
Checks if the given value is even.
interfaces: not, all, any
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)
Checks if the given value is odd.
interfaces: not, all, any
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)
Checks if the given value is positive.
interfaces: not, all, any
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)
Checks if the given value is negative.
interfaces: not, all, any
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:number)
Checks if the given value is above minimum value.
interface: not
is.above(41, 30);
=> true
is.not.above(42, 50);
=> true
is.under(value:number, max:number)
Checks if the given value is under maximum value.
interface: not
is.under(30, 35);
=> true
is.not.under(42, 30);
=> true
is.within(value:number, min:number, max:number)
Checks if the given value is within minimum and maximum values.
interface: not
is.within(30, 20, 40);
=> true
is.not.within(40, 30, 35);
=> true
is.decimal(value:number)
Checks if the given value is decimal.
interfaces: not, all, any
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)
Checks if the given value is integer.
interfaces: not, all, any
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)
Checks if the given value is finite.
interfaces: not, all, any
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)
Checks if the given value is infinite.
interfaces: not, all, any
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:number)
Checks if objects' property count is equal to given count.
interface: not
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:string)
Checks if the given property is defined on object.
interface: not
is.propertyDefined({yeap: 'yeap'}, 'yeap');
=> true
is.propertyDefined({yeap: 'yeap'}, 'nope');
=> false
is.not.propertyDefined({}, 'nope');
=> true
Array checks
is.inArray(value:any, array)
Checks if the given item is in array?
interface: not
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, sign:string)
Checks if the given array is sorted. Sign is optional parameter.
interfaces: not, all, any
is.sorted([1, 2, 3]);
=> true
is.sorted([1, 2, 4, 3]);
=> false
is.sorted([1, 1, 2, 2], '>=');
=> true
is.sorted([1, 2, 3, 4], '>');
=> true
is.sorted([4, 3, 3, 1], '<=');
=> true
is.sorted([4, 3, 2, 1], '<');
=> true
is.sorted([1, 2, 3, 3], '>');
=> false
is.not.sorted([5, 4, 3]);
=> true
is.not.sorted([5, 4, 3], '<');
=> false
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(range:number|string)
Checks if current browser is ie. Parameter is optional version range (or number) of browser.
interface: not
is.ie();
=> true if current browser is ie
is.not.ie();
=> false if current browser is ie
// also supports version number
is.ie(10);
=> true if current version of ie is 10
is.ie('>=10');
=> true if current version of ie is greater than or equal to 10
is.not.ie('<9');
=> true if current version of ie is not less than 9
is.chrome(range:number|string)
Checks if current browser is chrome. Parameter is optional version range (or number) of browser.
interface: not
is.chrome();
=> true if current browser is chrome
is.not.chrome();
=> false if current browser is chrome
// also supports version number
is.chrome(50);
=> true if current version of chrome is 50
is.chrome('>=40');
=> true if current version of chrome is greater than or equal to 40
is.not.chrome('<30');
=> true if current version of chrome is not less than 30
is.firefox(range:number|string)
Checks if current browser is firefox. Parameter is optional version range (or number) of browser.
interface: not
is.firefox();
=> true if current browser is firefox
is.not.firefox();
=> false if current browser is firefox
// also supports version number
is.firefox(41);
=> true if current version of firefox is 41
is.firefox('>=40');
=> true if current version of firefox is greater than or equal to 40
is.not.firefox('<30');
=> true if current version of firefox is not less than 30
is.edge(range:number|string)
Checks if current browser is edge. Parameter is optional version range (or number) of browser.
interface: not
is.edge();
=> true if current browser is edge
is.not.edge();
=> false if current browser is edge
// also supports version number
is.edge(13);
=> true if current version of edge is 13
is.edge('>=12');
=> true if current version of edge is greater than or equal to 12
is.not.edge('<13');
=> true if current version of edge is not less than 13
is.opera(range:number|string)
Checks if current browser is opera. Parameter is optional version range (or number) of browser.
interface: not
is.opera();
=> true if current browser is opera
is.not.opera();
=> false if current browser is opera
// also supports version number
is.opera(36);
=> true if current version of opera is 36
is.opera('>=35');
=> true if current version of opera is greater than or equal to 35
is.not.opera('<20');
=> true if current version of opera is not less than 20
is.safari(range:number|string)
Checks if current browser is safari. Parameter is optional version range (or number) of browser.
interface: not
is.safari();
=> true if current browser is safari
is.not.safari();
=> false if current browser is safari
// also supports version number
is.safari(9);
=> true if current version of safari is 9
is.safari('>=8');
=> true if current version of safari is greater than or equal to 8
is.not.safari('<7');
=> true if current version of safari is not less than 7
is.phantom(range:number|string)
Checks if current browser is phantomjs. Parameter is optional version range (or number) of browser.
interface: not
is.phantom();
=> true if current browser is phantomjs
is.not.phantom();
=> false if current browser is phantomjs
// also supports version number
is.phantom(2);
=> true if current version of phantom is 2
is.phantom('>=1');
=> true if current version of phantomjs is greater than or equal to 1
is.not.phantom('<2');
=> true if current version of phantomjs is not less than 2
is.ios()
Checks if current device has ios.
interface: not
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(range:number|string)
Checks if current device is iPhone. Parameter is optional version range (or number) of browser.
interface: not
is.iphone();
=> true if current device is iPhone
is.not.iphone();
=> true if current device is not iPhone
// also supports version number
is.iphone(9);
=> true if current version of iPhone is 9
is.iphone('>=7');
=> true if current version of iPhone is greater than or equal to 7
is.not.iphone('<8');
=> true if current version of iPhone is not less than 8
is.ipad(range:number|string)
Checks if current device is iPad.
interface: not
is.ipad();
=> true if current device is iPad
is.not.ipad();
=> true if current device is not iPad
// also supports version number
is.ipad(9);
=> true if current version of iPad is 9
is.ipad('>=7');
=> true if current version of iPad is greater than or equal to 7
is.not.ipad('<8');
=> true if current version of iPad is not less than 8
is.ipod(range:number|string)
Checks if current device is iPod.
interface: not
is.ipod();
=> true if current device is iPod
is.not.ipod();
=> true if current device is not iPod
// also supports version number
is.ipod(7);
=> true if current version of iPod is 7
is.ipod('>=5');
=> true if current version of iPod is greater than or equal to 5
is.not.ipod('<5');
=> true if current version of iPod is not less than 5
is.android()
Checks if current device has Android.
interface: not
is.android();
=> true if current device has Android OS
is.not.android();
=> true if current device has not Android OS
is.androidPhone()
Checks if current device is Android phone.
interface: not
is.androidPhone();
=> true if current device is Android phone
is.not.androidPhone();
=> true if current device is not Android phone
is.androidTablet()
Checks if current device is Android tablet.
interface: not
is.androidTablet();
=> true if current device is Android tablet
is.not.androidTablet();
=> true if current device is not Android tablet
is.blackberry()
Checks if current device is Blackberry.
interface: not
is.blackberry();
=> true if current device is Blackberry
is.not.blackberry();
=> true if current device is not Blackberry
is.windowsPhone()
Checks if current device is Windows phone.
interface: not
is.windowsPhone();
=> true if current device is Windows phone
is.not.windowsPhone();
=> true if current device is not Windows Phone
is.windowsTablet()
Checks if current device is Windows tablet.
interface: not
is.windowsTablet();
=> true if current device is Windows tablet
is.not.windowsTablet();
=> true if current device is not Windows tablet
is.windows()
Checks if current OS is Windows.
interface: not
is.windows();
=> true if current OS is Windows
is.not.windows();
=> true if current OS is not Windows
is.mac()
Checks if current OS is Mac OS X.
interface: not
is.mac();
=> true if current OS is Mac OS X
is.not.mac();
=> true if current OS is not Mac OS X
is.linux()
Checks if current OS is linux.
interface: not
is.linux();
=> true if current OS is linux
is.not.linux();
=> true if current OS is not linux
is.desktop()
Checks if current device is desktop.
interface: not
is.desktop();
=> true if current device is desktop
is.not.desktop();
=> true if current device is not desktop
is.mobile()
Checks if current device is mobile.
interface: not 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()
Checks if current device is tablet.
interface: not 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()
Checks if current device is online.
interface: not
is.online();
=> true if current device is online
is.not.online();
=> true if current device is not online
is.offline()
Checks if current device is offline.
interface: not
is.offline();
=> true if current device is offline
is.not.offline();
=> true if current device is not offline
is.touchDevice()
Checks if current device supports touch.
interface: not
is.touchDevice();
=> true if current device supports touch
is.not.touchDevice();
=> true if current device does not support touch
Time checks
is.today(value:date)
Checks if the given date object indicate today.
interfaces: not, all, any
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:date)
Checks if the given date object indicate yesterday.
interfaces: not, all, any
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:date)
Checks if the given date object indicate tomorrow.
interfaces: not, all, any
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:date)
Checks if the given date object indicate past.
interfaces: not, all, any
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:date)
Checks if the given date object indicate future.
interfaces: not, all, any
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:date, day:string)
Checks if the given date objects' day equal given dayString parameter.
interface: not
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:date, month:string)
Checks if the given date objects' month equal given monthString parameter.
interface: not
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:date, year:number)
Checks if the given date objects' year equal given yearNumber parameter.
interface: not
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)
Checks if the given year number is a leap year
interfaces: not, all, any
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:date)
Checks if the given date objects' day is weekend.
interfaces: not, all, any
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:date)
Checks if the given date objects' day is weekday.
interfaces: not, all, any
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.inDateRange(value:date, start:date, end:date)
Checks if date is within given range.
interface: not
var saturday = new Date('01/24/2015');
var sunday = new Date('01/25/2015');
var monday = new Date('01/26/2015');
is.inDateRange(sunday, saturday, monday);
=> true
is.inDateRange(saturday, sunday, monday);
=> false
is.not.inDateRange(saturday, sunday, monday);
=> true
is.inLastWeek(value:date)
Checks if the given date is between now and 7 days ago.
interface: not
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:date)
Checks if the given date is between now and a month ago.
interface: not
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:date)
Checks if the given date is between now and a year ago.
interface: not
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:date)
Checks if the given date is between now and 7 days later.
interface: not
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:date)
Checks if the given date is between now and a month later.
interface: not
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:date)
Checks if the given date is between now and a year later.
interface: not
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:date, quarter:number)
Checks if the given date is in the parameter quarter.
interface: not
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:date)
Checks if the given date is in daylight saving time.
interface: not
// 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.setNamespace()
Change namespace of library to prevent name collisions.
var customName = is.setNamespace();
customName.odd(3);
=> true
is.setRegexp(value:regexp, name:string)
Override RegExps if you think they suck.
is.url('https://www.duckduckgo.com');
=> true
is.setRegexp(/quack/, 'url');
is.url('quack');
=> true