marko
A declarative, HTML-based language that makes building web apps fun
... to allow building modern applications in a declarative way. Marko streams content to your users as soon as it’s ready. No waiting for client side JavaScript bundles or data requests to start rendering. HTML, assets, and images are loaded as soon as possible with asynchronous data loading in as it completes. Marko only sends the code for interactive components to the browser. Its compiler automatically detects which components only need to be rendered on the server.