The main caveat is that you have to create alternative paths for situation where the thing is rendered on the server and client side - browser APIs are not avai

The main caveat is that you have to create alternative paths for situation where the thing is rendered on the server and client side - browser APIs are not available in the former case. As for other options: Vue.js offers something like this with Nuxt.js. There's also this: https://sapper.svelte.dev https://sapper.svelte.dev Interesting and pleasant, but still 0.x.x, so caveat emptor.