Introducing ReActionView: An ActionView-Compatible ERB Engine
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This talk is the conclusion of a journey I’ve been sharing throughout 2025. At RubyKaigi, I introduced Herb: a new HTML-aware ERB parser and tooling ecosystem. At RailsConf, I released developer tools built on Herb, including a formatter, linter, and language server, alongside a vision for modernizing and improving the Rails view layer.
At Rails World, I’ll debut ReActionView: a new ERB engine built on Herb, fully compatible with .html.erb but with HTML validation, better error feedback, reactive updates, and built-in tooling.
This will be the first public release, exclusive to Rails World, tying together everything from the past talks and even bringing exclusive updates to tools I first showed at Rails World 2023.
Sep 05 - 14:45 to 15:15
Track 1
About the speaker
Marco Roth
Independent Consultant, Toolsday GmbH
Marco is a passionate full-stack Ruby on Rails developer and a dedicated open-source contributor. As a member of the Hotwire and StimulusReflex contributors teams he has been pushing the limits of real-time server-rendered applications using the HTML-over-the-wire (Hotwire) approach. He has actively open-sourced, maintained, and contributed to several key libraries within the Hotwire and Ruby on Rails ecosystem.