check-types

A little library for asserting types and values, with zero dependencies.

v11.2.3 URL: https://unpkg.com/check-types@11.2.3/src/check-types.js

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type types type-check type-checking duck-typing arguments parameters values data contract assert check verify safe safety

check-more-types

Large collection of predicates.

v2.24.0 URL: https://unpkg.com/check-more-types@2.24.0/dist/check-more-types.js

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check-types checks duck-typing type-checking types

check-types-2

A little library for asserting types and values, with zero dependencies. Follower for check-types (archived).

v11.8.1 URL: https://unpkg.com/check-types-2@11.8.1/src/check-types.js

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type types type-check type-checking duck-typing arguments parameters values data contract assert check verify safe safety

offensive

Fast and boilerplate-free precondition checks for javascript.

v3.6.0 URL: https://unpkg.com/offensive@3.6.0/index.js

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contract precondition postcondition invariant offensive defensive programming duck-typing crash early fail fast readable boilerplate dsl browserify webpack typescript

@gloch96/typed-getters

Unlike default EcmaScript (JavaScript) constructors such as `String() defaults to '' | Number() defaults to 0 | Symbol() defaults to Symbol() | Boolean() defaults to false` . Instead, using `typed-getters` we can maintain consistency among JavaScript prim

v2.0.1 URL: https://unpkg.com/@gloch96/typed-getters@2.0.1/index.js

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ecmascript javascript primitives types no-typescript type-checking duck-typing