ealush/vest

Health v2 · maintenance only

Adoption not part of the score

2665 stars · 91 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

Vest is a declarative validation framework for JavaScript/TypeScript that lets you write validation rules like unit tests using a Jest-style suite API. It provides a stateful runtime with focused runs, retained results, and race-safe async validation, usable across React, Vue, Svelte, Angular, and server-side Node.js.

Use cases

• validate form fields incrementally as the user types
• handle async validation race conditions like username availability checks
• share the same validation suite between client and server
• validate multi-step forms with groups and conditional fields
• write type-safe validation with schema inference
• integrate validation with React Hook Form, Angular, or Svelte form libraries

When to choose

• you need stateful, incremental form validation that remembers previous results
• your forms have async checks that can complete out of order
• you want validation logic decoupled from any UI framework
• you need to reuse the same validation rules on both client and server

When to avoid

• you only need simple one-shot synchronous validation of static data
• your framework's built-in validation already covers your needs
• you prefer schema-only validation without a test-like suite API

Facets

library · maturity active

form-handling testing type-system middleware web-development frontend developer-tools apis browser cross-platform validation form-validation async-validation declarative typescript react vue svelte angular standard-schema race-safety jest-like-syntax nodejs web-server

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