connective

combine predicate (bool returning) functions with propositional logic connectives (and, or, not)

v1.0.0 URL: https://unpkg.com/connective@1.0.0/index.js

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functional predicate higher order functions boolean propositional logic

logica

a compile-to-javascript predicate logic language

v0.2.6 URL: https://unpkg.com/logica@0.2.6/index.js

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logic predicate boolean jison dsl altjs language

is-boolean

Predicate that returns true for "boolean" values.

v0.0.2 URL: https://unpkg.com/is-boolean@0.0.2/is-boolean.js

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predicate boolean

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

es-to-primitive

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

v1.3.0 URL: https://unpkg.com/es-to-primitive@1.3.0/index.js

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