overleaf/services/web/.storybook/preview.js

import './preview.css'

// Storybook does not (currently) support async loading of "stories". Therefore
// the strategy in frontend/js/i18n.js does not work (because we cannot wait on
// the promise to resolve).
// Therefore we have to use the synchronous method for configuring
// react-i18next. Because this, we can only hard-code a single language.
import i18n from 'i18next'
import { initReactI18next } from 'react-i18next'
import en from '../locales/en.json'
i18n.use(initReactI18next).init({
  lng: 'en',

  resources: {
    en: { translation: en },
  },

  react: {
    useSuspense: false,
  },

  interpolation: {
    prefix: '__',
    suffix: '__',
    unescapeSuffix: 'HTML',
    skipOnVariables: true,
    defaultVariables: {
      appName: 'Overleaf',
    },
  },
})

export const parameters = {
  // Automatically mark prop-types like onClick, onToggle, etc as Storybook
  // "actions", so that they are logged in the Actions pane at the bottom of the
  // viewer
  actions: { argTypesRegex: '^on.*' },
  docs: {
    // render stories in iframes, to isolate modals
    inlineStories: false,
  },
}

export const globalTypes = {
  theme: {
    name: 'Theme',
    description: 'Editor theme',
    defaultValue: 'default-',
    toolbar: {
      icon: 'circlehollow',
      items: [
        { value: 'default-', title: 'Default' },
        { value: 'light-', title: 'Light' },
        { value: 'ieee-', title: 'IEEE' },
      ],
    },
  },
}

export const loaders = [
  async ({ globals }) => {
    const { theme } = globals

    return {
      // NOTE: this uses `${theme}style.less` rather than `${theme}.less`
      // so that webpack only bundles files ending with "style.less"
      activeStyle: await import(
        `!!to-string-loader!css-loader!less-loader!../frontend/stylesheets/${
          theme === 'default-' ? '' : theme
        }style.less`
      ),
    }
  },
]

const withTheme = (Story, context) => {
  const { activeStyle } = context.loaded

  return (
    <>
      {activeStyle && <style>{activeStyle.default}</style>}
      <Story {...context} />
    </>
  )
}

export const decorators = [withTheme]

window.ExposedSettings = {
  maxEntitiesPerProject: 10,
  maxUploadSize: 5 * 1024 * 1024,
  enableSubscriptions: true,
  textExtensions: [
    'tex',
    'latex',
    'sty',
    'cls',
    'bst',
    'bib',
    'bibtex',
    'txt',
    'tikz',
    'mtx',
    'rtex',
    'md',
    'asy',
    'latexmkrc',
    'lbx',
    'bbx',
    'cbx',
    'm',
    'lco',
    'dtx',
    'ins',
    'ist',
    'def',
    'clo',
    'ldf',
    'rmd',
    'lua',
    'gv',
    'mf',
  ],
}

window.user = {
  id: 'storybook',
}

window.project_id = 'storybook-project'
window.showNewPdfPreview = true