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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argumentsarraybooleancheckdatefunctionisis-typeis-type-ofkindkind-ofnumberobjectofregexpstringtesttypetype-oftypeoftypes

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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castcheckcoercecoercionfiniteintegerisisnanis-nanis-numis-numberisnumberisfiniteistypekindmathnannumnumbernumericparseFloatparseInttesttypetypeofvalue

is-plain-object

Returns true if an object was created by the `Object` constructor, or Object.create(null).
v5.0.0 URL: https://unpkg.com/is-plain-object@5.0.0/dist/is-plain-object.js
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checkisis-objectisobjectjavascriptkindkind-ofobjectplaintypetypeofvalue

isobject

Returns true if the value is an object and not an array or null.
v4.0.0 URL: https://unpkg.com/isobject@4.0.0/index.cjs.js
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checkisis-objectisobjectkindkind-ofkindofnativeobjecttypetypeofvalue

@sindresorhus/is

Type check values
v7.0.2 URL: https://unpkg.com/@sindresorhus/is@7.0.2/distribution/index.js
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typetypesischeckcheckingvalidatevalidationutilityutiltypeofinstanceofobjectassertassertiontestkindprimitiveverifycomparetypescripttypeguardstypes