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Addon Background Toggle
Storybook addon support global toggles
npm install storybook-addon-toggles
Last updated 12 months ago
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Storybook Addon Toggle

This addon is used to add a list of user defined global toggles that are accessible and customizable at the story level. All options are explained below, see Parameters section below.

Test it out at https://nickofthyme.github.io/storybook-addon-toggles/

Screen Recording 2023-05-26 at 11 24 24 AM

Compatibility

This version is compatible with storybook version >6.x.

As of storybook 6.3.0 global parameters are synced with the url as query search params (storybookjs/storybook#15056). As such this will lock-in the default global and be persisted between stories. If you want to avoid this behavior you should use storybook@~6.2.0.

Installation

yarn

yarn add -D storybook-addon-toggles

npm

npm i -D storybook-addon-toggles

Getting started

Once installed, add this addon to the addons array in storybooks main.js file:

// main.js
module.exports = {
  addons: [
    'storybook-addon-toggles'
  ],
};

See the storybook documentation for more information.

Parameters

The parameters for this plugin are under the toggles key and are defined below.

export interface Parameters<ToggleId extends string = string> {
  /**
   * Ignores global values in url params
   *
   * @default true
   */
  ignoreQueryParams?: false;
  /**
   * Toggle options
   */
  options: ToggleOptions<ToggleId>[];
  /**
   * Toggle default overrides from story level
   */
  overrides: Record<ToggleId, boolean>;
  /**
   * Enabled clearing all toggles to default values
   *
   * @default true
   */
  clearable?: boolean;
  /**
   * Addon is disabled at story level
   *
   * @default false
   */
  disabled?: boolean;
  /**
   * Override icon used in toolbar
   * See https://github.com/storybookjs/storybook/blob/release/6.2/lib/components/src/icon/icons.tsx
   *
   * @default 'form'
   */
  icon?: IconsProps['icon'];
  /**
   * A callback that will be executed when the toggles change
   */
  onChange?: (Toggles?: Toggles) => void;
}

The ToggleOptions type is defined below.

export type ToggleKey = string;
export type ToggleValue = boolean
export type Toggles = Record<string, ToggleValue>;

export interface ToggleOptions<T extends string = string> {
  /**
   * id of the toggle
   */
  id: T;
  /**
   * Title of the toggle in Selector UI
   */
  title?: string;
  /**
   * Description of the toggle, shows in title on hover
   */
  description?: string;
  /**
   * Default value
   */
  defaultValue: ToggleValue;
  /**
   * Disable toggle by boolean or list of dependent toggles
   */
  disabled?: boolean | Toggles;
}

Configuration

Global level

You can configure the toggles at the global level in the storybook preview.(ts|js) file as demonstrated below.

// preview.ts

import type { TogglesParameter } from 'storybook-addon-toggles';

type Parameters = TogglesParameter & {
  // other global types
};

export const parameters: Parameters = {
  toggles: {
    ignoreQueryParams: false,
    icon: 'form',
    options: [
      {
        id: 'option-1',
        title: 'Option 1',
        description: 'Some description of option 1',
        defaultValue: false,
      },
      {
        id: 'option-2',
        title: 'Option 2',
        defaultValue: true,
      },
      {
        id: 'option-3',
        title: 'Option 3',
        defaultValue: true,
        disabled: {
          "option-2": false
        }
      },
    ],
  }
};

Story level

All properties defined in TogglesParameter are capable of being overridden at the story level. However, it is only advisable to override some of the parameters to prevent defining parameters that could negatively affect the addon behavior across all stories. The acceptable properties include overrides, options, disabled, ignoreQueryParams and clearable. The BackgroundStoryParameter type is a helper that should be used to limit what properties are overridden at the story level.

// story.stories.tsx

import type { StoryTogglesParameter } from 'storybook-addon-toggles';

const Example = () => <span>Hello!</span>;

Example.parameters = {
  toggles: {
    overrides: {
      'option-1': false,
    }
  }
} as StoryTogglesParameter;

Usage of globals context

Storys

Each story is rendered with two parameters, the first is the args from Story.bind(myArgs), the second is the StoryContext. The StoryContext gives us direct access to the globals.

// story.stories.tsx

const Example = (args, context) => {
  return <span>Value of Option 1: ${context.globals.toggles['option-1']}</span>
};

Decorators

Global storybook Decorators can be used for a multitude of things. As such it is important to have access to the toggles inside the decorators. This is the primary reason for chosing to use globals to maintain the state of the toggles.

Below is a simple example of how you could access the toggles via the context.globals.

// preview.tsx

import React from "react";

import type { DecoratorFunction } from "@storybook/addons";
import type { TogglesGlobals } from 'storybook-addon-toggles';

const Decorator: DecoratorFunction<JSX.Element> = (Story, context) => {
  const globals = context.globals as TogglesGlobals;
  const toggles = globals.toggles; // object of all toggle values

  return (
    <div>
      <Story {...context} />
      <br />
      <pre>
        // Toggle values
        {JSON.stringify(toggles, null, 2)}
      </pre>
    </div>
  );
};

export const decorators = [Decorator];

See a full example of this in .storybook/Decorator.tsx.

Globals are currently not correctly initialized by storybook, meaning they always return {} as the initial value. To correct this, we update globals with the default/initial toggles once the SET_STORIES event is emitted, if they differ.

Framework Support

React
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