ensl_gathers/app/javascripts/components/menubar.js

const MenubarMixin = exports.MenubarMixin = {
	getInitialState() {
		return {
			show: false
		}
	},

	toggleShow() {
		this.setState({ show: !this.state.show });
	},

	componentClass() {
		let componentClass = ["dropdown", "messages-menu"];
		if (this.state.show) componentClass.push("open");
		return componentClass.join(" ");
	}
};