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Detect whether or not an object is a Typed Array
unist utility to check if a node passes a test
ES2015-compliant shim for Number.isNaN - the global isNaN returns false positives.
Type check values
Detect the file type of a Buffer/Uint8Array/ArrayBuffer
Returns true if an object was created by the `Object` constructor, or Object.create(null).
Check if the process is running inside Windows Subsystem for Linux (Bash on Windows)
Determines if an object can be used as an array
Are these two values conceptually equal?
Get the native type of a value.
Returns true if a number or string value is a finite number. Useful for regex matches, parsing, user input, etc.
Returns `true` if the given string looks like a glob pattern or an extglob pattern. This makes it easy to create code that only uses external modules like node-glob when necessary, resulting in much faster code execution and initialization time, and a bet
Check if a value is a plain object
Standard assertion utilities.
- stdlib
- stdassert
- assertion
- assert
- expectation
- expect
- utilities
- utility
- utils
- util
- test
- check
- validate
- validation
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Check if a path is a file, directory, or symlink
Check if the process is running inside a Docker container
Returns true if the value is an object and not an array or null.
Check if your package was installed globally
Function argument validation for humans
- type
- types
- check
- checking
- guard
- guards
- assert
- assertion
- predicate
- predicates
- is
- validate
- validation
- utility
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A pseudo-class for matching elements in a selector list