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174 lines
3.9 KiB
Plaintext
174 lines
3.9 KiB
Plaintext
---
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title: 'core'
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sidebar:
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order: 8
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title: core
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---
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Parent: [main.js|ts configuration](./main-config.mdx)
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Type:
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```ts
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{
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builder?: string | { name: string; options?: BuilderOptions };
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channelOptions?: ChannelOptions;
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crossOriginIsolated?: boolean;
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disableProjectJson?: boolean;
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disableTelemetry?: boolean;
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disableWebpackDefaults?: boolean;
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disableWhatsNewNotifications?: boolean;
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enableCrashReports?: boolean;
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renderer?: RendererName;
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}
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```
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Configures Storybook's internal features.
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## `builder`
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Type:
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```ts
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| '@storybook/builder-vite' | '@storybook/builder-webpack5'
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| {
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name: '@storybook/builder-vite' | '@storybook/builder-webpack5';
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options?: BuilderOptions;
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}
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```
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Configures Storybook's builder, [Vite](../../builders/vite.mdx) or [Webpack](../../builders/webpack.mdx).
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<Callout variant="info" icon="💡">
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With the new [Framework API](../new-frameworks.mdx), [`framework.options.builder`](./main-config-framework.mdx#optionsbuilder) is now the preferred way to configure the builder.
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You should only use `core.builder.options` if you need to configure a builder that is not part of a framework.
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</Callout>
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{/* prettier-ignore-start */}
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<CodeSnippets path="main-config-core-builder.md" />
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{/* prettier-ignore-end */}
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## `channelOptions`
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Type: `ChannelOptions`
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```ts
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{
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allowClass: boolean;
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allowDate: boolean;
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allowFunction: boolean;
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allowRegExp: boolean;
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allowSymbol: boolean;
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allowUndefined: boolean;
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lazyEval: boolean;
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maxDepth: number;
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space: number | undefined;
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}
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```
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Configures the channel used by Storybook to communicate between the manager and preview.
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Only two properties are likely to be used:
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### `channelOptions.allowFunction`
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Type: `boolean`
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Default: `false`
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Enables serializing functions across the channel, which can be a security risk.
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### `channelOptions.maxDepth`
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Type: `number`
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Default: `3`
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The maximum depth of nested objects to serialize across the channel. Larger values will be slower.
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## `crossOriginIsolated`
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Type: `boolean`
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Enable CORS headings to run document in a "secure context". See [SharedArrayBuffer security requirements](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer#security_requirements)
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This enables these headers in development-mode:
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* `Cross-Origin-Opener-Policy: same-origin`
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* `Cross-Origin-Embedder-Policy: require-corp`
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{/* prettier-ignore-start */}
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<CodeSnippets path="main-config-core-cross-origin-isolated.md" />
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{/* prettier-ignore-end */}
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## `disableProjectJson`
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Type: `boolean`
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Disables the generation of `project.json`, a file containing Storybook metadata
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{/* prettier-ignore-start */}
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<CodeSnippets path="main-config-core-disable-project-json.md" />
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{/* prettier-ignore-end */}
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## `disableTelemetry`
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Type: `boolean`
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Disables Storybook's [telemetry collection](../../configure/telemetry.mdx).
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{/* prettier-ignore-start */}
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<CodeSnippets path="main-config-core-disable-telemetry.md" />
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{/* prettier-ignore-end */}
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## `disableWebpackDefaults`
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Type: `boolean`
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Disables Storybook's default Webpack configuration.
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{/* prettier-ignore-start */}
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<CodeSnippets path="main-config-core-disable-webpack-defaults.md" />
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{/* prettier-ignore-end */}
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## `disableWhatsNewNotifications`
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Type: `boolean`
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Disables the "What's New" notifications in the UI for new Storybook versions and ecosystem updates (e.g., [addons](https://storybook.js.org/integrations/), [content](https://storybook.js.org/blog/), etc.).
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{/* prettier-ignore-start */}
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<CodeSnippets path="main-config-core-disable-update-notifications.md" />
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{/* prettier-ignore-end */}
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## `enableCrashReports`
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Type: `boolean`
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Enable crash reports to be sent to Storybook [telemetry](../../configure/telemetry.mdx).
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{/* prettier-ignore-start */}
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<CodeSnippets path="main-config-core-enable-crash-reports.md" />
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{/* prettier-ignore-end */}
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## `renderer`
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Type: `RendererName`
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{/* TODO: Is this used? Should it be documented? */}
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