imbrn/v8n

Health v2 · maintenance only

Adoption not part of the score

4143 stars · 105 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

v8n is a fluent, chainable JavaScript validation library for validating any kind of data, from primitives to objects and arrays. It offers 30+ built-in rules, custom rule extension, async validation, and reusable validation schemas with TypeScript support.

Use cases

• validate user form input in javascript
• check that a string matches length and character rules
• validate arrays of numbers with fluent chaining
• create reusable custom validation rules
• run asynchronous data validation
• validate api request payloads in nodejs

When to choose

• you want a readable, English-like chainable validation API
• you need lightweight validation without a form framework
• you want to define and reuse custom validation rules across modules
• you need both sync and async validation strategies

When to avoid

• you need schema-based validation with type inference like zod or joi
• you are validating complex nested object schemas with detailed error reporting
• your project requires a library with frequent maintenance releases

Facets

library · maturity stable

testing developer-tools web-development developer-tools frontend browser cross-platform validation fluent-api chainable typescript-support data-validation nodejs

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