storybook/docs/migration-guide/index.md

title
Migration guide for Storybook 8.0

Storybook 8 focuses on performance and stability.

• 💨 2-4x faster test builds, 25-50% faster React docgen, and SWC support for Webpack projects
• ✨ Improved framework support: you no longer need to install React as a peer dependency when using a non-React renderer
• 🌐 Support for React Server Components (RSC): our experimental solution renders async RSC in the browser and mocks Node code
• ➕ Much, much more

This guide is meant to help you upgrade from Storybook 7.x to 8.0 successfully!

Migrating from Storybook 6.x?

We have a dedicated migration guide for Storybook 6 to 8.

Major breaking changes

The rest of this guide will help you upgrade successfully, either automatically or manually. But first, there are some breaking changes in Storybook 8. Here are the most impactful changes you should know about before you go further:

• storiesOf API has been removed
• *.stories.mdx format has been removed
• Implicit actions (from argTypesRegex) can no longer be used during rendering (e.g. in a play function)
• react-docgen (instead of react-docgen-typescript) is the default for component analysis
• Storyshots has been removed
• Addons API introduced in Storybook 7 is now required
• Ecosystem updates
  • Node 18+ is now required
  • Next.js 13.5+ is now required
  • Vue 3+ is now required
  • Angular 15+ is now required
  • Svelte 4+ is now required
  • Yarn 1 is no longer supported

If any of these changes apply to your project, please read through the linked migration notes before continuing.

If any of these new requirements or changes are blockers for your project, we recommend to continue using Storybook 7.x.

You may wish to read the full migration notes before migrating. Or you can follow the instructions below and we’ll try to take care of everything for you!

Automatic upgrade

To upgrade your Storybook:

<CodeSnippets paths={[ 'common/storybook-upgrade.npm.js.mdx', 'common/storybook-upgrade.pnpm.js.mdx', 'common/storybook-upgrade.yarn.js.mdx' ]} />

This will:

1. Determine that none of the breaking changes apply to your project
   • If they do, you will receive instructions on how to resolve them before continuing
2. Upgrade your Storybook dependencies to the latest version
3. Run a collection of automigrations, which will:
   • Check for common upgrade tasks
   • Explain the necessary changes with links to more information
   • Ask for approval, then perform the task on your behalf

To add Storybook to a project that isn’t currently using Storybook:

<CodeSnippets paths={[ 'common/init-command.npx.js.mdx', 'common/init-command.pnpm.js.mdx', 'common/init-command.yarn.js.mdx' ]} />

This will:

1. Figure out which renderer (React, Vue, Angular, Web Components), builder (Webpack, Vite), or meta-framework (Next.js, SvelteKit) you’re using
2. Install Storybook 8 and auto-configure it to mirror project settings

Manual migrations

In addition to the automated upgrades above, there are manual migrations that might be required to get Storybook 8 working in your project. We’ve tried to minimize this list to make it easier to upgrade. These include:

storiesOf to CSF

Storybook architecture focuses on performance and now needs statically analyzable code. For that reason, it does not work with storiesOf. We provide a codemod which, in most cases, should automatically make the code changes for you (make sure to update the glob to fit your files):

<CodeSnippets paths={[ 'common/storybook-migrate-stories-of-to-csf.npm.js.mdx', 'common/storybook-migrate-stories-of-to-csf.pnpm.js.mdx', 'common/storybook-migrate-stories-of-to-csf.yarn.js.mdx' ]} />

This will transform your stories into CSF 1 stories, which are story functions that don't accept args. These are fully supported in Storybook 8, and will continue to be for the foreseeable future.

However, we recommend writing all new stories in CSF 3, which are story objects that are easier to write, reuse, and maintain.

storiesOf to dynamically created stories

If you are using storiesOf for its ability to create stories dynamically, you can build your own "storiesOf" implementation by leveraging the new (experimental) indexer API. A proof of concept (with a deeper explanation of the implementation) can be seen in this StackBlitz demo.

*.stories.mdx to MDX+CSF

Storybook now requires that MDX pages reference stories written in CSF, rather than the previous .stories.mdx hybrid approach. You can automatically convert your files using the following codemod (make sure to update the glob to fit your files):

<CodeSnippets paths={[ 'common/storybook-migrate-mdx-to-csf.npm.js.mdx', 'common/storybook-migrate-mdx-to-csf.pnpm.js.mdx', 'common/storybook-migrate-mdx-to-csf.yarn.js.mdx' ]} />

You’ll also need to update your stories glob in .storybook/main.js to include the newly created .mdx and .stories.js files if it doesn’t already.

Note: this migration supports the Storybook 6 "CSF stories with MDX docs" recipe.

Troubleshooting

The automatic upgrade should get your Storybook into a working state. If you encounter an error running Storybook after upgrading, here’s what to do:

1. Try running the doctor command to check for common issues (such as duplicate dependencies, incompatible addons, or mismatched versions) and see suggestions for fixing them.
2. If you’re running storybook with the dev command, try using the build command instead. Sometimes build errors are more legible than dev errors!
3. Check the full migration notes, which contains an exhaustive list of noteworthy changes in Storybook 8. Many of these are already handled by automigrations when you upgrade, but not all are. It’s also possible that you’re experiencing a corner case that we’re not aware of.
4. Search Storybook issues on GitHub. If you’re seeing a problem, there’s a good chance other people are too. If so, upvote the issue, try out any workarounds described in the comments, and comment back if you have useful info to contribute.
5. If there’s no existing issue, you can file one, ideally with a reproduction attached. We’ll be on top of Storybook 8 issues as we’re stabilizing the release.

If you prefer to debug yourself, here are a few useful things you can do to help narrow down the problem:

1. Try removing all addons that are not in the @storybook npm namespace (make sure you don't remove the storybook package). Community addons that work well with 7.x might not yet be compatible with 8.0, and this is the fastest way to isolate that possibility. If you find an addon that needs to be upgraded to work with Storybook 8, please post an issue on the addon’s repository, or better yet, a pull request to upgrade it!
2. Another debugging technique is to bisect to older prerelease versions of Storybook to figure out which release broke your Storybook. For example, assuming that the current prerelease of Storybook is 8.0.0-beta.56, you could set the version to 8.0.0-alpha.0 in your package.json and reinstall to verify that it still works (alpha.0 should be nearly identical to 7.6.x). If it works, you could then try 8.0.0-beta.0, then 8.0.0-beta.28 and so forth. Once you’ve isolated the bad release, read through its CHANGELOG entry and perhaps there’s a change that jumps out as the culprit. If you find the problem, please submit an issue or pull request to the Storybook monorepo and we’ll do our best to take care of it quickly.

Optional migrations

In addition to the automigrations and manual migrations above, there are also optional migrations that you should consider. These are features that we’ve deprecated in Storybook 8 (but remain backwards compatible), or best practices that should help you be more productive in the future.

These include:

CSF 2 to CSF 3

There are many good reasons to convert your stories from CSF 2 to CSF 3. We provide a codemod which, in most cases, should automatically make the code changes for you (make sure to update the glob to fit your files):

<CodeSnippets paths={[ 'common/storybook-migrate-csf-2-to-3.npm.js.mdx', 'common/storybook-migrate-csf-2-to-3.pnpm.js.mdx', 'common/storybook-migrate-csf-2-to-3.yarn.js.mdx' ]} />