[Tracking]: Storybook 8 - Breaking Changes

[valentinpalkovic]

This issue serves to monitor and document the non-backwards compatible changes that will be introduced in Storybook's major update to version 8. It provides a platform for the contributors to list the expected breaking changes, discuss their impact, propose migration strategies, and collaborate on the development and transition process.

Features and Upgrades

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1. Decouple compilers from webpack5-builder #25172
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2. Upgrade minimum supported Node.js version to v18 #25174
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3. Support Vite 5 #25127
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4. Upgrade to MDX 3 #25182
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5. Upgrade Prettier, Eslint and Remark #25128
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Removals

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1. Remove @storybook/addon-storyshots #25185
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2. Drop StoryStoreV6 support (Remove features storyStoreV7 and buildStoriesJson) #25117
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3. Drop Vue2 support
4. Drop Next.js < 13.5 support (Next.js: Drop Next.js < v13.5 support #25104
5. Drop Angular 14 support (Angular: Drop v14.x support #25101)
6. Drop Svelte 3 support #25330
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7. Migration Doc: Drop Yarn1 support #25358
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8. Find deprecations and remove them #25331
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Explicit Action args

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1. Runtime error when action args generated from docgen are used in story rendering or the play function.
2. Remove the TS magic of making required action args optional
3. Make sure play function errors out when event handlers fail
4. Remove argTypesRegex from sb init
5. Remove any @storybook/jest occurences and use @storybook/test exclusively #25583
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[valentinpalkovic]

@shilman I guess we don't want to have any @storybook/jest references in 8.0. Should I add another task to replace @storybook/jest by @storybook/test? We are still using @storybook/jest in some stories and it is also added for the sandboxes.

[shilman]

@valentinpalkovic good call! 👍

[valentinpalkovic]

@shilman Let's drop Ember < 4.12 support since it is no longer maintained: https://emberjs.com/releases/lts/
WDYT?

[shilman]

@valentinpalkovic I'd rather not rock the boat on Ember until we have a path forward to work with the community. Let's discuss after 8.0 unless you feel strongly this needs to be dealt with now.