# Knockout-Contrib/Knockout-Validation

A validation library for Knockout JS

Repository: https://github.com/Knockout-Contrib/Knockout-Validation
Canonical: https://ross.abutalabs.com/products/knockout-validation
Language: JavaScript
License Family: other
Topics: knockoutjs, javascript, knockout-validation, validation-library, knockoutjs-plugin
Last push: 2022-07-27T14:27:26+00:00

## Health v2 (maintenance only)
Score: 23/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 8, longevity 100
- inputs: {"age_days": 5427, "days_push": 1498, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1012, forks 366 (observed 2026-08-28T04:03:13.384813+00:00)

## What it is
A Knockout.js plugin that adds model and property validation to Knockout observables and view models. It supports declarative validation rules like required, minLength, and pattern via observable extenders.

## Use cases
- validate knockout observables
- form validation in knockoutjs apps
- check if view model properties are valid
- add required field rules to observables
- pattern and length validation for javascript models

## When to choose
- you already use Knockout.js and need observable-level validation
- you want declarative, chainable validation rules on view models

## When to avoid
- you use React, Vue, or Angular instead of Knockout
- you need a actively developed validation library with recent updates

## Facets
- artifact type: plugin
- maturity: maintenance
- function: form-handling, ui-components
- domain: web-development, frontend
- platform: browser
- tags: knockoutjs, validation-library, javascript, observable-validation, mvvm, nodejs

## Member repositories
- Knockout-Contrib/Knockout-Validation (main) score 23

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:03:13.384813+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T07:11:43.065174+00:00, confidence not recorded.
  - readme: https://github.com/Knockout-Contrib/Knockout-Validation (fetched 2026-08-28T04:03:13.384813+00:00, sha b2fd69286c2c)
- Data as of 2026-08-30T08:39:29.467469+00:00.