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43 packages found
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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ES2015-compliant shim for Number.isNaN - the global isNaN returns false positives.
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
The ts-is-number a utility npm package that checks if a given input is a valid finite number or a string that can be converted to a valid finite number.
ExtremeJS Utilities
Collection of methods for check
- isArray
- isBoolean
- isDate
- isFunction
- isNull
- isNumber
- isObject
- isString
- isUndefined
- isElement
- isEmpty
- isEmail
- isNaN
- isRegExp
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A simple utility to Check the value is number or can convert to a number, for example string ' 123 ' can be converted to 123.
Returns sensible integer value of a given variable. Unlike parseInt it will never return NaN and you can set a default value to be returned in case the variable is undefined! Hence you can write even cleaner code. So if it's supposed to be an integer, cas
- intval
- int val
- int value
- integer value
- int
- integer
- parseint
- parse int
- parse integer
- number
- numeric
- type
- typecast
- isnan
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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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locore is a Standard library. the library with basic JavaScript methods to improve development efficiency.
- locore
- lodash
- typescripts
- qianduanka
- type
- isPrimitive
- isNumber
- isString
- isBoolean
- isNull
- isUndefined
- isBigInt
- isSymbol
- isPureObject
- View more
MDN polyfills
Validates if a value is NaN.
The lodash method `_.isNaN` exported as a module.
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Validates if a value is a NaN primitive.
ES2015-compliant shim for Number.isNaN - the global isNaN returns false positives.
Provides type detection and analysis for ANY Javascript object (including custom types) in any environment, even where native operators falter.
- get-type
- get-type-of
- getTypeOf
- typeanalyser
- type-analyzer
- typeOf
- type-introspection
- type-check
- type-checker
- type-details
- type-detect
- type-detection
- javascript-types
- type-validation
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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.