Comment by frontendbeauty

There are a few options. Easiest is to just render HTML strings on the server, not actual DOM. But, you can also use a DOM implementation if you want to, like jsdom or PhantomJS, and then capture the outerHTML of an element as an HTML string to serve. But, that is slower. React.js has a nice middleground approach; it has a fast pure-JavaScript DOM abstraction that can emit either DOM (browser) or HTML (server).