docs: function( cb ) {
  
  		// If we are running in node.js replace the THREE.js XHRLoader
  		// with an offline version.
  		var isBrowser=new Function("try {return this===window;}catch(e){ return false;}"); // browser exclude
  		if (!isBrowser()) {
  
  			// Expose 'THREE' for non-compatible scripts
  			global.THREE = THREE;
  
  			// Override XHR Loader
  			global.THREE.XHRLoader = require('./lib/FileXHRLoader');
  
  		}
  
  		// Trigger callback
  		if (cb) cb();
  
  	}