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1769 packages found
Detect whether or not an object is a Typed Array
unist utility to check if a node passes a test
Type check values
mdast utility to check if a node is phrasing content
hast utility to check if a node is a (certain) element
A simple utility to Check the value is number or can convert to a number, for example string ' 123 ' can be converted to 123.
Standard assertion utilities.
- stdlib
- stdassert
- assertion
- assert
- expectation
- expect
- utilities
- utility
- utils
- util
- test
- check
- validate
- validation
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Function argument validation for humans
- type
- types
- check
- checking
- guard
- guards
- assert
- assertion
- predicate
- predicates
- is
- validate
- validation
- utility
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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 a string.
pvtsutils is a set of common utility functions used in various Peculiar Ventures TypeScript based projects.
Neo-Async is a drop-in replacement for Async, it almost fully covers its functionality and runs faster
micromark utility to classify whether a character is whitespace or punctuation
Returns true if a file path is absolute. Does not rely on the path module and can be used as a polyfill for node.js native `path.isAbolute`.
Test if a value is a collection.
- stdlib
- stdassert
- assertion
- assert
- utilities
- utility
- utils
- util
- array
- typed array
- collection
- float64array
- float32array
- int32array
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Returns `true` if the value is a primitive.
Test if a value is a regular expression string.
- stdlib
- stdassert
- assertion
- assert
- utils
- util
- utilities
- utility
- isregexp
- regular expression
- regexp
- regex
- regular
- expression
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Type predicate functions for checking if a value is of a specific type or asserting that it is.
hast utility to check if a node is inter-element whitespace