is-number

Returns true if a number or string value is a finite number. Useful for regex matches, parsing, user input, etc.

v7.0.0 URL: https://unpkg.com/is-number@7.0.0/index.js

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cast check coerce coercion finite integer is isnan is-nan is-num is-number isnumber isfinite istype kind math nan num number numeric parseFloat parseInt test type typeof value

is-negative-zero

Is this value negative zero? === will lie to you

v2.0.3 URL: https://unpkg.com/is-negative-zero@2.0.3/index.js

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is negative zero negative zero number positive 0 -0

kind-of

Get the native type of a value.

v6.0.3 URL: https://unpkg.com/kind-of@6.0.3/index.js

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arguments array boolean check date function is is-type is-type-of kind kind-of number object of regexp string test type type-of typeof types

typical

Isomorphic, functional type-checking for Javascript

v7.3.0 URL: https://unpkg.com/typical@7.3.0/index.js

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type checking check value valid is detect number object plainobject array like defined string boolean function promise iterable class primitive isstring isclass isiterable isdefined isobject isomorphic async is-async es6 es2015

@stdlib/assert-is-number

Test if a value is a number.

v0.2.2 URL: https://unpkg.com/@stdlib/assert-is-number@0.2.2/lib/index.js

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stdlib stdassert assertion assert utilities utility utils util number numeric is type check isnumber isnumeric primitive object validate valid test