env-sentinel/dist/validation/validate-number.js

Zero-dependency tool that auto-validates .env files against schema.env, with optional fallback and secure warnings.

export function validateNumber(key, value) {
    const errorMessage = `Invalid number for ${key}`;
    if (value.trim() === '') {
        return errorMessage;
    }
    return isNaN(Number(value)) ? errorMessage : true;
}