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110 packages found
Test if a value is an empty string.
Test whether a string contains only white space characters.
Test whether a string contains only alphanumeric characters.
Test whether a character belongs to the ASCII character set and whether this is true for all characters in a provided string.
Test if a value is an anagram.
- stdlib
- stdassert
- assertion
- assert
- utilities
- utility
- utils
- util
- is
- anagram
- string
- isstring
- isanagram
- type
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Test whether a string contains only numeric digits.
Test if a value is a binary string.
- stdlib
- stdassert
- assertion
- assert
- utilities
- utility
- utils
- util
- is
- binary
- string
- isstring
- isbinary
- binarystring
- View more
Test if a value is an alphagram.
- stdlib
- stdassert
- assertion
- assert
- utilities
- utility
- utils
- util
- string
- alphabetical
- order
- alphagram
- anagram
- sorted
- View more
Test whether a string contains only hexadecimal digits.
Test if a value is a blank string.
A collection of JavaScript type checks.
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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JavaScript utility methods for strings
Simple type checker in JavaScript.
- utils
- util
- type checking
- type checker
- type
- checker
- isAlpha
- isAlphanumeric
- isArguments
- isArray
- isBoolean
- isDate
- isDecimal
- isDefined
- View more
ExtremeJS Utilities
Validates if a value is a string primitive.
A very simple "typeof" detection
The `util.is*` functions introduced in Node v0.12.
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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A utility function to fix and extend the built-in ''typeof'' operator of JavaScript.