27 packages found
ES2015-compliant shim for Number.isNaN - the global isNaN returns false positives.
Returns true if a number or string value is a finite number. Useful for regex matches, parsing, user input, etc.
Test if a double-precision floating-point numeric value is NaN.
- stdlib
- stdmath
- assertion
- assert
- utilities
- utility
- utils
- util
- math
- mathematics
- ieee754
- floating-point
- float
- number
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Test if a value is NaN.
Test if a single-precision floating-point numeric value is NaN.
- stdlib
- stdmath
- assertion
- assert
- utilities
- utility
- utils
- util
- math
- mathematics
- ieee754
- floating-point
- float
- number
- View more
Test if a value is an array-like object containing only NaN values.
- stdlib
- stdassert
- assertion
- assert
- utilities
- utility
- utils
- util
- typed
- array
- typed array
- is
- istypedarray
- istyped
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This is a JavaScript utility. It returns `true` if the value is a string number written in fixed notation and in decimal base.
This is a JavaScript utility. It returns `true` if the value is a number or plain number string (not in scientific exponential notation or hexadecimal notation for instance).
Collection of methods for check
- isArray
- isBoolean
- isDate
- isFunction
- isNull
- isNumber
- isObject
- isString
- isUndefined
- isElement
- isEmpty
- isEmail
- isNaN
- isRegExp
Widely supported version of Number.isNaN. Checks whether a value is a number and that it's not NaN.
Widely supported version of Number.isFinite. Checks whether a value is a finite number.
a collection of javascript prototype extensions that make your javascript coding very easy and hanndy.
- prototype
- extension
- methods
- toDateTime
- trimAll
- toCamelCase
- toKebabCase
- toPascalCase
- toSnakeCase
- left
- right
- mid
- reverse
- sort
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Simple type checker in JavaScript.
- utils
- util
- type checking
- type checker
- type
- checker
- isAlpha
- isAlphanumeric
- isArguments
- isArray
- isBoolean
- isDate
- isDecimal
- isDefined
- View more
MDN polyfills
Oh my type! Tiny and robust type checker.
- javascript
- types
- utility
- isString
- isNumber
- isBoolean
- isUndefined
- isNull
- isNaN
- isObject
- isArray
- isSymbol
- isFunction
Simple type checker in JavaScript.
- utils
- util
- type checking
- type checker
- type
- checker
- isAlpha
- isAlphanumeric
- isArguments
- isArray
- isBoolean
- isDate
- isDecimal
- isDefined
- View more
A very simple "typeof" detection
Validates if a value is NaN.
The lodash method `_.isNaN` exported as a module.
A very simple "typeof" detection