Storybook 8.5 has been released with improved accessibility, testing, and code coverage

Storybook has launched version 8.5 of its frontend workshop, enhancing its capabilities for building, documenting, and testing UI components. This release significantly improves accessibility by upgrading the a11y add-on to run Axe accessibility checks across all stories during development, streamlining the process of meeting accessibility guidelines.

The update also introduces project code coverage, allowing developers to measure which lines and branches of UI code are executed during testing, aiding in the completeness of test suites. Focused Tests, another new feature, enables testing of specific stories or components within Storybook's hierarchical sidebar, facilitating targeted testing while maintaining comprehensive CI test coverage.

Additionally, the React Native Web Vite (RNW-Vite) framework is now officially supported, offering browser rendering of React Native stories with full compatibility with Storybook's extensive range of add-ons. This framework will replace the previously community-maintained, Webpack-based RNW add-on.

Storybook 8.5 also includes support for React 19, Vite 6, and Angular 19, along with experimental support for Bun and Nuxt, Svelte Storybook test support, and introduces a new code add-on panel, among other features, enhancements, and bug fixes.