Turbopack is optimized to give you an extremely fast development server. We considered these features indispensable.
Turbopack supports Hot Module Replacement out of the box. Because of our incremental architecture, we are hyper-optimized for delivering fast updates.
Fast Refresh builds on top of HMR by providing a framework-level integration to preserve state across updates. Changes to a
<Count /> component, for instance, would preserve the component's internal
count across changes.
Turbopack supports Fast Refresh out of the box for React. Support for other frameworks will be added over time.