# Announcing Hotwire Spark: live reloading for Rails applications

DevFeed: [Announcing Hotwire Spark: live reloading for Rails applications](<https://devfeed.tech/articles/announcing-hotwire-spark-live-reloading-for-rails-applications-33499.md>)

Original publisher: [Read original article](<https://dev.37signals.com/announcing-hotwire-spark-live-reloading-for-rails/>)

Author: Jorge Manrubia

Published: 2024-12-18T18:00:00Z

Content type: release

Language: en

Sources: [37signals Dev](<https://devfeed.tech/sources/37signals-dev.md>)

Topics: [Hotwire](<https://devfeed.tech/topics/hotwire.md>), [Rails](<https://devfeed.tech/topics/rails.md>), [Stimulus](<https://devfeed.tech/topics/stimulus.md>), [Front end](<https://devfeed.tech/topics/frontend.md>)

Tags: [css](<https://devfeed.tech/tags/css.md>), [frontend](<https://devfeed.tech/tags/frontend.md>), [hotwire](<https://devfeed.tech/tags/hotwire.md>), [html](<https://devfeed.tech/tags/html.md>), [rails](<https://devfeed.tech/tags/rails.md>), [stimulus](<https://devfeed.tech/tags/stimulus.md>)

## AI overview

37signals announces Hotwire Spark, a live-reloading system for Rails applications. It automatically updates the current page when HTML, CSS, or Stimulus controller source changes, using smooth page morphing, stylesheet reloads, and controller replacement without bundling or frontend build tooling.

## Source excerpt

Improve your feedback loop with smooth automatic page updates.