@mikaelb/storybook-addon-theme-toggle
    TypeScript icon, indicating that this package has built-in type declarations

    0.2.0 • Public • Published

    Storybook Addon Theme Toggle

    This addon is inspired by @storybook/addon-backgrounds and storybook-addon-themes and builds a smoother and more feature rich implementation. Also see storybook-addon-background-toggle.

    This addon can be used to add a custom HTML class(es) to one or many target HTML elements. All options are explained below, see Parameters section below.

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

    https://user-images.githubusercontent.com/19007109/128076049-7aca13a8-9e5e-4ce2-9bc0-9f82ab662418.mp4

    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 can use storybook@~6.2.0.

    Installation

    yarn

    yarn add -D storybook-addon-theme-toggle

    npm

    npm i -D storybook-addon-theme-toggle

    Getting started

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

    // main.js
    module.exports = {
      addons: ["storybook-addon-theme-toggle"],
    };

    See the storybook documentation for more information.

    Parameters

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

    interface Parameters {
      /**
       * Ignores global values in url params
       *
       * @default true
       */
      ignoreQueryParams?: false;
      /**
       * Tefault theme id
       */
      default?: string;
      /**
       * Theme options to be applied
       */
      themes: Theme[];
      /**
       * Selected theme is clearable
       *
       * @default true
       */
      clearable?: boolean;
      /**
       * Disable addon at story level
       *
       * @default false
       */
      disable?: boolean;
      /**
       * Persist theme selection between stories
       *
       * @default false
       */
      persist?: boolean;
      /**
       * Blur tooltip on theme selection
       *
       * @default true
       */
      blurOnSelect?: boolean;
      /**
       * Override icon used in toolbar
       * See https://next--storybookjs.netlify.app/official-storybook/?path=/story/basics-icon--labels
       *
       * @default 'mirror'
       */
      icon?: IconsProps["icon"];
      /**
       * A callback that will be executed when the theme changes
       */
      onChange?: (theme: Theme) => void;
      /**
       * A function that if defined it overrides values in global settings for backgrounds
       * to sync with theme
       */
      toBackgroundValue?: (theme?: Theme) => string;
      /**
       * Target element selector(s) to apply class(es)
       *
       * @default 'body'
       */
      selector?: string | string[];
    }

    The Theme type is defined below.

    interface Theme {
      /**
       * id of the theme
       */
      id: string;
      /**
       * Title of the theme in theme selector ui
       *
       * @default {@link Theme#id}
       */
      title?: string;
      /**
       * Class or classes to be applied to targeted element(s) via selector(s)
       */
      class?: string | string[];
      /**
       * Badge color in the theme selector ui
       */
      color: string;
      /**
       * Url of image to display over color swatch on theme selector
       */
      imageUrl?: string;
    }

    Configuration

    Global level

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

    // preview.ts
    
    import type { ThemeParameter } from "storybook-addon-theme-toggle";
    
    type Parameters = ThemeParameter & {
      // other global parameter types
    };
    
    export const parameters: Parameters = {
      theme: {
        default: "light",
        selector: "body",
        onChange(theme) {
          // handle new theme
        },
        themes: [
          {
            id: "light",
            title: "Light",
            class: "light",
            color: "#fff",
          },
          {
            id: "dark",
            title: "Dark",
            class: "dark",
            color: "#000",
          },
        ],
      },
    };

    Story level

    All properties defined in ThemeParameter 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 default, blurOnSelect, disable, ignoreQueryParams and clearable. The ThemeStoryParameter type is a helper that should be used to limit what properties are overridden at the story level;

    // story1.stories.tsx
    
    import type { ThemeStoryParameter } from 'storybook-addon-theme-toggle';
    
    const Example = () => <span>Hello!</span>;
    
    Example.parameters: ThemeStoryParameter = {
      theme: {
        default: 'dark',
      }
    };

    Usage in Decorators

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

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

    // preview.tsx
    
    import React from "react";
    
    import type { DecoratorFunction } from "@storybook/addons";
    import type { ThemeGlobals } from "storybook-addon-theme-toggle";
    
    const Decorator: DecoratorFunction<JSX.Element> = (Story, context) => {
      const globals = context.globals as ThemeGlobals;
      const selectedTheme = globals.theme;
    
      return (
        <div>
          <Story {...context} />
          <br />
          <pre>
            Theme: {selectedTheme}
            {JSON.stringify(globals, 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 theme id once the SET_STORIES event is emitted, if they differ.

    Framework Support

    React

    Install

    npm i @mikaelb/storybook-addon-theme-toggle

    DownloadsWeekly Downloads

    3

    Version

    0.2.0

    License

    MIT

    Unpacked Size

    56 kB

    Total Files

    41

    Last publish

    Collaborators

    • mikaelb