chai

BDD/TDD assertion library for node.js and the browser. Test framework agnostic.

v6.2.1 URL: https://unpkg.com/chai@6.2.1/index.js

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test assertion assert testing chai

@hapi/code

assertion library

v9.0.3 URL: https://unpkg.com/@hapi/code@9.0.3/lib/index.js

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test expect assertion

n4s

Assertion library for form validations

v5.0.28 URL: https://unpkg.com/n4s@5.0.28/dist/umd/n4s.production.js

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vest enforce n4s validation assertion schema validation form validation validation library

@mapbox/fusspot

A tiny runtime library for type assertions

v0.8.1 URL: https://unpkg.com/@mapbox/fusspot@0.8.1/lib/index.js

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yaassertion

Yet another JavaScript assertion/invariant library.

v1.0.2 URL: https://unpkg.com/yaassertion@1.0.2/dist/index.js

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invariant assertion