Color Scheme Switcher

Description

This package facilitates toggling the color scheme of a react app between dark and light mode.

This can be done either manually or automatically.

If done automatically, it can either follow the system color scheme, or follow daylight in the user's location.

This library is careful not to request geolocation permissions, which could be intrusive to users, unless it will be used.

Installation

npm i color-scheme-switcher

Note: react and react-dom are peer dependencies.

Usage

Provider Options

Option	Type	Optional?	Default	Description
defaultColorSchemeIsLight	boolean	Yes	false	This sets whether the default color scheme is light mode or dark mode before the page has fully loaded.
setColorSchemeIsLightCallback	(value: boolean) => void	Yes	None	This is a function which will be run whenever the color scheme changes.

Integration

See src/examples for other examples.

1. In your _app.tsx (or similar) file, wrap children with the color-scheme-switcher provider.

   Note: if your component library's theme provider can use the colorSchemeIsLight boolean from this library directly, wrap the theme provider in a component that calls the useColorSchemeSwitcher hook and pass it in directly (not demonstrated here).

   import { ColorSchemeSwitcherProvider } from "color-scheme-switcher";
   import { SomeComponentLibraryProvider } from "some-component-library";
   
   const App: AppType = ({ Component, pageProps }) => {
     const defaultColorSchemeIsLight = true;
     const [colorScheme, setColorScheme] = useState<"light" | "dark">(
       defaultColorSchemeIsLight ? "light" : "dark"
     );
   
     const setColorSchemeIsLightCallback = (colorSchemeIsLight: boolean) => {
       setColorScheme(colorSchemeIsLight ? "light" : "dark");
     };
   
     return (
       <ColorSchemeSwitcherProvider
         defaultColorSchemeIsLight={defaultColorSchemeIsLight}
         setColorSchemeIsLightCallback={setColorSchemeIsLightCallback}
       >
         <SomeComponentLibraryProvider colorScheme={colorScheme}>
           <Component {...pageProps} />
         </SomeComponentLibraryProvider>
       </ColorSchemeSwitcherProvider>
     );
   };
   
   export default App;

2. In a component or page (or similar), use the context from this package.

   import { useColorSchemeSwitcher } from "color-scheme-switcher";
   import { Checkbox } from "@/components";
   
   interface HomePageProps {}
   
   const HomePage: React.FC<HomePageProps> = () => {
     const {
       colorSchemeIsLight,
       colorSchemeIsManual,
       colorSchemeFollowsSun,
       setColorSchemeIsLight,
       setColorSchemeIsManual,
       setColorSchemeFollowsSun,
     } = useColorSchemeSwitcher();
   
     return (
       <div
         sx={{
           color: colorSchemeIsLight ? "black" : "white",
           backgroundColor: colorSchemeIsLight ? "white" : "black",
         }}
       >
         <Checkbox
           label="Color Scheme is Manual"
           value={colorSchemeIsManual}
           setValue={setColorSchemeIsManual}
         />
   
         {colorSchemeIsManual ? (
           <Checkbox
             label="Color Scheme is Light"
             value={colorSchemeIsLight}
             setValue={setColorSchemeIsLight}
           />
         ) : (
           <Checkbox
             label="Color Scheme Follows Sun"
             value={colorSchemeFollowsSun}
             setValue={setColorSchemeFollowsSun}
           />
         )}
   
         <p>{`Color scheme is light? ${colorSchemeIsLight ? "yes" : "no"}`}</p>
         <p>{`Color scheme is manual? ${
           colorSchemeIsManual ? "yes" : "no"
         }`}</p>
         <p>{`Color scheme follows sun? ${
           colorSchemeFollowsSun ? "yes" : "no"
         }`}</p>
       </div>
     );
   };
   
   export default HomePage;

To-Do

• Document exported utils.
• Add options for changing other defaults.

Development

1. Fork this repository.

2. Install development dependencies.

   npm i -D

3. Start build and test watchers.

   npm run build:watch

   npm run test:watch

4. Modify code.

5. Ensure all tests pass.

6. Push code to your fork.

7. Submit a merge request into the development branch of this repository.