There's actually no need for that anymore. JavaScript as is supported right now in the latest Chrome, Firefox and Safari is already pretty good. You can get quite far without any backend tooling these days.
The only thing which I believe is still needed is a bundler when your project grows to a certain size. Fetching a complex graph of thousands of files will likely never be fast.
The only thing which I believe is still needed is a bundler when your project grows to a certain size. Fetching a complex graph of thousands of files will likely never be fast.