validate.io-undefined

Validates if a value is undefined.

v1.0.3 URL: https://unpkg.com/validate.io-undefined@1.0.3/lib/index.js

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validate.io validate validation validator undefined void is type check isundefined valid

@stdlib/assert-is-undefined-or-null

Test if a value is undefined or null.

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

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stdlib stdassert assertion assert utilities utility utils util undefined void null is isundefined isnull isvoid type check valid validate test

@stdlib/assert-is-undefined

Test if a value is undefined.

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

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stdlib stdassert assertion assert utilities utility utils util undefined void is isundefined isvoid type check valid validate test

typeov

👺 weak but accurate type checking that returns a string representation of input's type

v1.2.6 URL: https://unpkg.com/typeov@1.2.6/dist/typeov.js

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type types coerce coercion checker check flow typing typeof typeov detection ispromise isnumber isinfinity isnull isundefined isbool isboolean isarray isobject isstring whatis kindof assert is what

check-defined

Simple utility function for checking isDefined for complex objects with long property paths

v1.0.1 URL: https://unpkg.com/check-defined@1.0.1/index.js

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check-defined check-undefined defined isdefined isundefined undefined util utilities utility