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core

Type:

{
  builder?: string | { name: string; options?: BuilderOptions };
  channelOptions?: ChannelOptions;
  crossOriginIsolated?: boolean;
  disableProjectJson?: boolean;
  disableTelemetry?: boolean;
  disableWebpackDefaults?: boolean;
  disableWhatsNewNotifications?: boolean;
  enableCrashReports?: boolean;
  renderer?: RendererName;
}

Configures Storybook's internal features.

`builder`

Type:

| '@storybook/builder-vite' | '@storybook/builder-webpack5'
| {
    name: '@storybook/builder-vite' | '@storybook/builder-webpack5';
    options?: BuilderOptions;
  }

Configures Storybook's builder, Vite or Webpack.

With the new Framework API, framework.options.builder is now the preferred way to configure the builder.

You should only use core.builder.options if you need to configure a builder that is not part of a framework.

.storybook/main.ts

// Replace your-framework with the framework you are using (e.g., react-webpack5, vue3-vite)
import type { StorybookConfig } from '@storybook/your-framework';
 
const config: StorybookConfig = {
  framework: '@storybook/your-framework',
  stories: ['../src/**/*.mdx', '../src/**/*.stories.@(js|jsx|mjs|ts|tsx)'],
  core: {
    builder: {
      name: '@storybook/builder-vite',
      options: {
        viteConfigPath: '../../../vite.config.js',
      },
    },
  },
};
 
export default config;

`channelOptions`

Type: ChannelOptions

{
  allowClass: boolean;
  allowDate: boolean;
  allowFunction: boolean;
  allowRegExp: boolean;
  allowSymbol: boolean;
  allowUndefined: boolean;
  lazyEval: boolean;
  maxDepth: number;
  space: number | undefined;
}

Configures the channel used by Storybook to communicate between the manager and preview.

Only two properties are likely to be used:

`channelOptions.allowFunction`

Type: boolean

Default: false

Enables serializing functions across the channel, which can be a security risk.

`channelOptions.maxDepth`

Type: number

Default: 3

The maximum depth of nested objects to serialize across the channel. Larger values will be slower.

`crossOriginIsolated`

Type: boolean

Enable CORS headings to run document in a "secure context". See SharedArrayBuffer security requirements

This enables these headers in development-mode:

Cross-Origin-Opener-Policy: same-origin
Cross-Origin-Embedder-Policy: require-corp

.storybook/main.ts

// Replace your-framework with the framework you are using (e.g., react-webpack5, vue3-vite)
import type { StorybookConfig } from '@storybook/your-framework';
 
const config: StorybookConfig = {
  framework: '@storybook/your-framework',
  stories: ['../src/**/*.mdx', '../src/**/*.stories.@(js|jsx|mjs|ts|tsx)'],
  core: {
    crossOriginIsolated: true,
  },
};
 
export default config;

`disableProjectJson`

Type: boolean

Disables the generation of project.json, a file containing Storybook metadata

.storybook/main.ts

// Replace your-framework with the framework you are using (e.g., react-webpack5, vue3-vite)
import type { StorybookConfig } from '@storybook/your-framework';
 
const config: StorybookConfig = {
  framework: '@storybook/your-framework',
  stories: ['../src/**/*.mdx', '../src/**/*.stories.@(js|jsx|mjs|ts|tsx)'],
  core: {
    disableProjectJson: true,
  },
};
 
export default config;

`disableTelemetry`

Type: boolean

Disables Storybook's telemetry collection.

.storybook/main.ts

// Replace your-framework with the framework you are using (e.g., react-webpack5, vue3-vite)
import type { StorybookConfig } from '@storybook/your-framework';
 
const config: StorybookConfig = {
  framework: '@storybook/your-framework',
  stories: ['../src/**/*.mdx', '../src/**/*.stories.@(js|jsx|mjs|ts|tsx)'],
  core: {
    disableTelemetry: true,
  },
};
 
export default config;

`disableWebpackDefaults`

Type: boolean

Disables Storybook's default Webpack configuration.

.storybook/main.ts

// Replace your-framework with the framework you are using (e.g., react-webpack5, vue3-vite)
import type { StorybookConfig } from '@storybook/your-framework';
 
const config: StorybookConfig = {
  framework: '@storybook/your-framework',
  stories: ['../src/**/*.mdx', '../src/**/*.stories.@(js|jsx|mjs|ts|tsx)'],
  core: {
    disableWebpackDefaults: true,
  },
};
 
export default config;

`disableWhatsNewNotifications`

Type: boolean

Disables the "What's New" notifications in the UI for new Storybook versions and ecosystem updates (e.g., addons, content, etc.).

.storybook/main.ts

// Replace your-framework with the framework you are using (e.g., react-webpack5, vue3-vite)
import type { StorybookConfig } from '@storybook/your-framework';
 
const config: StorybookConfig = {
  framework: '@storybook/your-framework',
  stories: ['../src/**/*.mdx', '../src/**/*.stories.@(js|jsx|mjs|ts|tsx)'],
  core: {
    disableWhatsNewNotifications: true,
  },
};
 
export default config;

`enableCrashReports`

Type: boolean

Enable crash reports to be sent to Storybook telemetry.

.storybook/main.ts

// Replace your-framework with the framework you are using (e.g., react-webpack5, vue3-vite)
import type { StorybookConfig } from '@storybook/your-framework';
 
const config: StorybookConfig = {
  framework: '@storybook/your-framework',
  stories: ['../src/**/*.mdx', '../src/**/*.stories.@(js|jsx|mjs|ts|tsx)'],
  core: {
    enableCrashReports: true, // 👈 Appends the crash reports to the telemetry events
  },
};
 
export default config;

`renderer`

Type: RendererName