Install

shell npm install --save detect-node

Usage:

```js var isNode = require('detect-node');

if (isNode) { console.log("Running under Node.JS"); } else { alert("Hello from browser (or whatever not-a-node env)"); } ```

The check is performed as: ```js module.exports = false;

// Only Node.JS has a process variable that is of [[Class]] process try { module.exports = Object.prototype.toString.call(global.process) === '[object process]' } catch(e) {}

```

Thanks to Ingvar Stepanyan for the initial idea. This check is both the most reliable I could find and it does not use process env directly, which would cause browserify to include it into the build.