# Specma

_Simple, reusable and composable validation_

Specma is a Javascript library to validate any type of value against a **simple, reusable and composable spec**.

- Collection specs defined with the exact **same shape as the value**!
- Based on **predicate functions** of type `true || "reason"`
- **Composable specs** with intuitive `and`/`or` operators
- Easy **cross-validation** between multiple fields
- User defined **customized invalid reasons**
- **Async validation** out of the box
- Very **small footprint**

[View complete documentation](https://davidsavoie1.github.io/specma)