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-typeschecksduck-typingtype-checkingtypes

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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typetypestype-checktype-checkingduck-typingargumentsparametersvaluesdatacontractassertcheckverifysafesafety

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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typetypestype-checktype-checkingduck-typingargumentsparametersvaluesdatacontractassertcheckverifysafesafety

uncouple

Uncouple constructors and classes methods into functions.
v0.6.0 URL: https://unpkg.com/uncouple@0.6.0/dist/index.umd.min.js
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uncoupleprototypeduck-typingfunctionalfunctional-programming

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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contractpreconditionpostconditioninvariantoffensivedefensiveprogrammingduck-typingcrash earlyfail fastreadableboilerplatedslbrowserifywebpacktypescript