code: function _transform() {
  	var codeIn = $('#codeIn').val();
  	try {
  		var codeOut = Streamline.transform(codeIn, {
  			runtime: _generators ? "generators" : "callbacks",
  		});
  		$('#codeOut').val(codeOut);
  		info("ready");
  	} catch (ex) {
  		console.error(ex);
  		error(ex.message);
  	}
  }
docs: define demo if user does not execute intro