you don't have to make a monolith web app, or use React, Angular et.al, or transpilers, not even JQuery. State can be managed by observable pattern or event lis

you don't have to make a monolith web app, or use React, Angular et.al, or transpilers, not even JQuery. State can be managed by observable pattern or event listeners. example: app.on("new_private_msg", updateMsgBadge); app.on("new_chat_msg", updateMsgBadge); function updateMsgBadge() { this.badge.newMessages = PRIVATE_MSG.reduce(msg => msg.unread) + CHAT_MSG.reduce(msg => msg.unread); } Parts of the app can be abstracted into micro-services. For example the signup can be it's own micro-service. Or using the plugin pattern each widget can be independent/untangled.