Install
npm install --save detect-node

## Usage:

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:

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.