---
title: 'Storybook 6.4 - December 2021'
---

## [Smaller, faster, interactive](https://github.com/storybookjs/storybook/issues/15355)

SB6.4 adds adds interaction testing and performance re-architecture ahead of a huge 7.0 release.

- ▶️ [**Interactive stories**](https://storybook.js.org/blog/interactive-stories-beta/) to simulate user behavior and tools to debug it
- ⚡️ [**On-demand architecture**](https://storybook.js.org/blog/storybook-on-demand-architecture/) for smaller builds and faster load times
- ⛸ **Automigrate + versioned documentation** for easier upgrades
- 📋 [**Linter**](https://github.com/storybookjs/eslint-plugin-storybook) to enforce Storybook best practices
- 💯 **Hundreds more fixes** and quality of life improvements

---

6.4 contains hundreds more fixes, features, and tweaks. Browse the [changelogs](https://github.com/storybookjs/storybook/blob/next/CHANGELOG.md) matching `6.4.0-alpha.*`, `6.4.0-beta.*`, and `6.4.0-rc.*` for the full list of changes. See [Storybook 6 migration guide](https://storybook.js.org/blog/storybook-6-migration-guide/) to upgrade from `5.x` or [MIGRATION.md](https://github.com/storybookjs/storybook/blob/next/MIGRATION.md) for detailed migration instructions.
