ReActionView adds real reactivity to your existing .html.erb templates, no Hotwire, no Stimulus, no JavaScript you have to write yourself. That is the part that got me.

Hotwire already does a lot for us, but it still asks you to write a Stimulus controller once the interaction gets specific, and Marco’s demo showed a page that updates itself because the server understands the template better than an ERB compiler ever has.

In this article, I cover what Marco showed at Rails World: how ReActionView builds on Herb, why the view layer needed this, how it fits next to Hotwire and the wider field of server-driven reactivity, and what shipped in the release he pushed out the same day as the talk.

Read more here: Rails World ‘26: Herb and ReActionView