Storybook Addon LaunchDarkly

Use LaunchDarkly in your Storybook stories.

Disclamer

This is not official storybook addon. I made this because LD won't for years https://github.com/launchdarkly/react-client-sdk/issues/30.

I can't actively handle the issues which is not in my usecase. and won't because LD officials won't help.

Install

yarn

yarn add --dev storybook-addon-launchdarkly

npm

npm install -D storybook-addon-launchdarkly

Add the addon to your configuration in .storybook/main.js

module.exports = {
  ...config,
  addons: [
    ...your addons
    "storybook-addon-launchdarkly",
  ],
};

Writing your stories with flags

import Example from '.';

const meta = {
  component: Example,
} satisfies Meta<typeof Example>;
export default meta;

export const Default: StoryObj<typeof meta> = {
  parameters: {
    launchdarkly: {
      flags: {
        testFlag: true,
      },
    },
  },
};

Writing your test with flagged stories

Because composeStory dosen't handdle addons, you need to setup. check this comment for referrence.

// setupFile.js
import { setProjectAnnotations } from '@storybook/react';
import globalConfig from '../.storybook/preview';
import addonLaunchdarklyConfig from 'storybook-addon-launchdarkly/preview';

setProjectAnnotations({
  ...globalConfig,
  decorators: [
    ...globalConfig.decorators,
    // not loaded automatically in preset, must add this manually for @storybook/testing-react to pick it up
    ...addonLaunchdarklyConfig.decorators,
  ],
});

// Example.test.tsx
import { composeStories } from '@storybook/react';
import { render, screen } from '@testing-library/react';
import * as stories from './Example.stories';

describe('Example', () => {
  const { True, False } = composeStories(stories);

  test('flag shoud be True', async () => {
    render(<True {...True.args} />);

    expect(screen.queryByText('True')).not.toBeNull();
    expect(screen.queryByText('False')).toBeNull();
  });

  test('flag shoud be False', async () => {
    render(<False {...False.args} />);

    expect(screen.queryByText('True')).toBeNull();
    expect(screen.queryByText('False')).not.toBeNull();
  });
});

Example StoryBook

https://kodai3.github.io/storybook-addon-launchdarkly