README.md

Storybook Jotai Addon

A Storybook v8 addon and decorator for Jotai mocking and displaying current values in a Storybook panel.

If you want to setup parameters to be strongly typed, see @alexgorbatchev/storybook-parameters.

Install

npm i --save-dev @alexgorbatchev/storybook-addon-jotai

Register the addon in .storybook/main.js

export default {
  stories: ['../stories/**/*.stories.tsx'],
  addons: ['@alexgorbatchev/storybook-addon-jotai'],
};

Important

Please keep in mind that the addon wraps everything with Provider from jotai package. It's important that your story components don't include the Provider, otherwise the addon won't be able to see and set atom values.

Usage

Given a simple component:

import { useAtom, atom } from 'jotai';

const userAtom = atom(null);

export const Header = () => {
  const [user] = useAtom(userAtom);

  return (
    <div>
      {user ? (
        <div>
          <div>{`Logged in as ${user.name}`}</div>
          <Button size="small" label="Log out" onClick={() => setUser(null)} />
        </div>
      ) : (
        <div>
          <div>No one is signed in</div>
          <Button size="small" label="Log in" onClick={() => setUser({ name: 'John' })} />
        </div>
      )}
    </div>
  );
};

You can write a story as

import { atomsForStorybook } from '@alexgorbatchev/storybook-addon-jotai';
import { Meta, StoryObj } from '@storybook/react';

import { User, userAtom } from './User';

type Story = StoryObj<typeof Header>;

const meta: : Meta<typeof Header> = {
  title: 'User',
  component: User,
};

export default meta;

export const JohnLoggedIn: Story = {
  parameters: {
    jotai: atomsForStorybook({
      atoms: {
        user: userAtom,
      },
      values: {
        user: {
          name: 'John Doe',
        },
      },
    }),
  },
};

// `jotai`, `atoms`, and `values` each can be a function for deferred evaluation.
export const JaneLoggedIn: Story = {
  parameters: {
    jotai: () => atomsForStorybook({
      atoms: () => ({
        user: userAtom,
      }),
      values: () => ({
        user: {
          name: 'Jane Doe',
        },
      }),
    }),
  };
};

export const LoggedOut: Story = {};

Strongly typed example:

import { Meta, StoryObj } from '@alexgorbatchev/storybook-parameters';
import { JotaiParameters } from '@alexgorbatchev/storybook-addon-jotai';

import { User, userAtom } from './User';

interface StoryParameters extends JotaiParameters {}

const meta: Meta<typeof Header, StoryParameters> = {
  title: 'Header',
  component: Header,
};

export default meta;

type Story = StoryObj<typeof Header, StoryParameters>;

export const JohnLoggedIn: Story = {
  parameters: {
    // `jotai` is strongly typed
    jotai: atomsForStorybook({
      atoms: {
        user: userAtom,
      },
      values: {
        user: {
          name: 'Jane Doe',
        },
      },
    }),
  },
};

Development Scripts

• npm run storybook starts Storybook
• tsup build ./dist