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import {
type Dispatch,
type FC,
type ReactNode,
type SetStateAction,
createContext,
useMemo,
useCallback,
useEffect,
} from 'react';
import { getDataAttributeFrom } from '../../helpers';
import { useLocalStorage } from '../../hooks';
type MotionContextProps = {
isReduced: boolean;
setIsReduced: Dispatch<SetStateAction<boolean>>;
toggleReducedMotion: () => void;
};
export const MotionContext = createContext<MotionContextProps>({
isReduced: false,
setIsReduced: (value) => value,
toggleReducedMotion: () => null,
});
const validator = (value: unknown): value is boolean =>
typeof value === 'boolean';
export type MotionProviderProps = {
/**
* The attribute name to append to document root.
*/
attribute: string;
/**
* The provider children.
*/
children?: ReactNode;
/**
* Is reduced motion currently active?
*
* @default false
*/
hasReducedMotion?: boolean;
/**
* The key to use in local storage.
*/
storageKey: string;
};
export const MotionProvider: FC<MotionProviderProps> = ({
attribute,
children,
hasReducedMotion = false,
storageKey,
}) => {
const [isReduced, setIsReduced] = useLocalStorage(
storageKey,
hasReducedMotion,
validator
);
const dataAttribute = getDataAttributeFrom(attribute);
useEffect(() => {
if (typeof window !== 'undefined')
document.documentElement.setAttribute(dataAttribute, `${isReduced}`);
return () => {
document.documentElement.removeAttribute(dataAttribute);
};
}, [dataAttribute, isReduced]);
const toggleReducedMotion = useCallback(() => {
setIsReduced((prevState) => !prevState);
}, [setIsReduced]);
const value: MotionContextProps = useMemo(() => {
return { isReduced, setIsReduced, toggleReducedMotion };
}, [isReduced, setIsReduced, toggleReducedMotion]);
return (
<MotionContext.Provider value={value}>{children}</MotionContext.Provider>
);
};
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