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/
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;
/**
* 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 theSET_STORIES
event is emitted, if they differ.
Framework Support
React |
---|
:white_check_mark: |