Introduction

env-typed-guard is a high-performance runtime safety layer for configuration correctness in Node.js applications.

The Problem

In production, missing or malformed environment variables are silent killers. Typos in .env files or forgotten variables in CI/CD pipelines often lead to runtime crashes that are hard to debug.

Quick Example

import { defineEnv } from "env-typed-guard";

const env = defineEnv({
  PORT: { type: "number", defaultValue: 3000 },
  DATABASE_URL: { type: "string" },
});

console.log(env.PORT); // 3000 (typed as number)