Check if you're running in Edge Runtime vs Node.js

env-check.ts

export function getRuntimeEnvironment() {
  // Check for Edge Runtime
  if (typeof EdgeRuntime !== 'undefined') {
    return 'edge';
  }
  
  // Check for Node.js
  if (typeof process !== 'undefined' && process.versions?.node) {
    return 'node';
  }
  
  // Check for Browser
  if (typeof window !== 'undefined') {
    return 'browser';
  }
  
  // Check for Deno
  if (typeof Deno !== 'undefined') {
    return 'deno';
  }
  
  // Check for Bun
  if (typeof Bun !== 'undefined') {
    return 'bun';
  }
  
  return 'unknown';
}

// Usage
console.log('Running in:', getRuntimeEnvironment());