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@stdlib/assert-is-empty-string
Test if a value is an empty string.
stdlib stdassert assertion assert utilities utility utils util empty is isstring string str isstr
is-empty
Check whether a value is "empty".
array check empty file is map object set value
has-value
Returns true if a value exists, false if empty. Works with deeply nested values using object paths.
array boolean check deep empty function has hasOwn is-empty nested null number object object path
is-extglob
Returns true if a string has an extglob.
bash braces check exec expression extglob glob globbing globstar is match matches pattern regex
kind-of
Get the native type of a value.
arguments array boolean check date function is is-type is-type-of kind kind-of number object of
empty-dir
Check if a directory is empty.
empty is-empty directory folder check
is-valid-glob
Return true if a value is a valid glob pattern or patterns.
array check glob is match pattern patterns read test valid validate
type-check
type-check allows you to check the types of JavaScript values at runtime with a Haskell like type syntax.
type check checking library
is-glob
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
bash braces check exec expression extglob glob globbing globstar is match matches pattern regex
has-flag
Check if argv has a specific flag
has check detect contains find flag cli command-line argv process arg args argument arguments
is-number
Returns true if a number or string value is a finite number. Useful for regex matches, parsing, user input, etc.
cast check coerce coercion finite integer is isnan is-nan is-num is-number isnumber isfinite istype
is-valid-path
Returns true if a file path does not contain any invalid characters.
bash braces character check exec expression extglob file filepath glob globbing globstar invalid match
is-ip
Check if a string is an IP address
ip ipv6 ipv4 regex regexp match test find text pattern internet protocol address validate
is-plain-object
Returns true if an object was created by the `Object` constructor, or Object.create(null).
check is is-object isobject javascript kind kind-of object plain type typeof value
has-glob
Returns `true` if an array has a glob pattern.
bash braces check exec expression extglob glob globbing globstar has match matches pattern regex
is-primitive
Returns `true` if the value is a primitive.
boolean check is number primitive string symbol type typeof util
isobject
Returns true if the value is an object and not an array or null.
check is is-object isobject kind kind-of kindof native object type typeof value
is-invalid-path
Returns true if a windows file path has invalid characters.
bash braces character check exec expression extglob file filepath glob globbing globstar invalid is
is-extendable
Returns true if a value is a plain object, array or function.
array assign check date extend extendable extensible function is object regex test
is-alphanumeric
Check if a string only contains alphanumeric characters
numbers numeric alphabet alphabetic check is detect latin alphanumeric string text letters digit arabic