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

es-to-primitive

ECMAScript “ToPrimitive” algorithm. Provides ES5 and ES2015 versions.

v1.2.1 URL: https://unpkg.com/es-to-primitive@1.2.1/index.js

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primitive abstract ecmascript es5 es6 es2015 toPrimitive coerce type object string number boolean symbol null undefined

valgen

Fast runtime type validator, converter and io (encoding/decoding) library

v5.12.0 URL: https://unpkg.com/valgen@5.12.0/cjs/index.js

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validate validation validator check encoding decoding coerce convert converter transform type

@thi.ng/args

Declarative, functional & typechecked CLI argument/options parser, value coercions etc.

v2.3.48 URL: https://unpkg.com/@thi.ng/args@2.3.48/index.js

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ansi argument cli coerce color conversion declarative functional hex logger no-browser nodejs parser tuple typescript validate

ensurism

A validation and conditional assignment utility belt

v0.7.0 URL: https://unpkg.com/ensurism@0.7.0/index.js

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ensure coerce assert configuration environment