Xtypejs – Efficient data-validating pseudo types for JavaScript

In plain words

Xtypejs is a JavaScript library that provides efficient data validation through pseudo types. It allows developers to validate data structures and types in their JavaScript applications with a focus on performance and clean syntax. The tool is designed for JavaScript developers who need reliable data validation without heavy overhead. Its main strength is combining elegant code patterns with computational efficiency for type checking and data validation tasks.

written from the facts on this page · September 2026

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