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128 packages found
Test if a value is a number having a finite negative value.
- stdlib
- stdassert
- assertion
- assert
- utilities
- utility
- utils
- util
- number
- numeric
- negative
- is
- isnumber
- isnumeric
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Validates if a value is a number primitive, excluding NaN.
A collection of JavaScript type checks.
Test if a value is a number having a finite positive value.
- stdlib
- stdassert
- assertion
- assert
- utilities
- utility
- utils
- util
- number
- numeric
- positive
- is
- isnumber
- isnumeric
- View more
JavaScript library to check data types
- types
- type
- check
- type-check
- type-checker
- typechecker
- isBoolean
- isObject
- isNull
- isDate
- isFunction
- isRegExp
- isArray
- isNumber
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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
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TypeScript typeof utility helper with no dependencies.
- typescript
- util
- typeof
- type guards
- isArray
- isBase64
- isBoolean
- isDate
- isDateValid
- isDefined
- isError
- isFunction
- isGuid
- isInfinity
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ExtremeJS Utilities
The `util.is*` functions introduced in Node v0.12.
check if the argument is a number or not
Common typescript ready prototypes available in both CommonJS and ECMAScript
- server-side
- client-side
- common
- typescript
- prototype
- array
- all
- any
- append
- average
- chunk
- clone
- compact
- contains
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Validates if a value is a number primitive and an integer.
Simple and light-weight JavaScript type checker that brings convenience!
- is-array
- isArray
- is-bigint
- isBigint
- is-blob
- isBlob
- is-boolean
- isBoolean
- is-date
- isDate
- is-error
- isError
- is-file
- isFile
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Validates if a value is a positive number primitive.
A utility function to fix and extend the built-in ''typeof'' operator of JavaScript.
js各种类型判断工具/A type tool for javascript
- isWindow
- isNumber
- isDef
- isUnDef
- isObject
- isEmpty
- isDate
- isNull
- isNullAndUnDef
- isNullOrUnDef
- isPromise
- isString
- isFunction
- isBoolean
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The `util.is*` functions introduced in Node v0.12. Now with React Native support.
Returns true if a number or string value is a finite number. Useful for regex matches, parsing, user input, etc.
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
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Curried TypeScript type guards for primitive types and classes