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webpackFinal

Type: async (config: Config, options: WebpackOptions) => Config

Customize Storybook's Webpack setup when using the webpack builder.

.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)'],
  async webpackFinal(config, { configType }) {
    if (configType === 'DEVELOPMENT') {
      // Modify config for development
    }
    if (configType === 'PRODUCTION') {
      // Modify config for production
    }
    return config;
  },
};
 
export default config;

`Options`

Type: { configType?: 'DEVELOPMENT' | 'PRODUCTION' }

There are other options that are difficult to document here. Please introspect the type definition for more information.