@beisen/storybook-react/src/server/framework-preset-react.js

Storybook for React: Develop React Component in isolation with Hot Reloading.

export function babelDefault(config) {
  return {
    ...config,
    presets: [
      ...config.presets,
      require.resolve('@babel/preset-react'),
      require.resolve('@babel/preset-flow'),
    ],
  };
}