A collection of React hooks used at Studio Lumio to enhance our development workflow.
🚩The API may be changed without prior notice.
$ yarn add @studio-lumio/hooks
$ npm i @studio-lumio/hooksuseOnClickOutside – Trigger a callback when the user clicks outside a reference node.
useOnClickOutside(ref, () => console.log('clicked outside'))
useDebug – returns true if #debug is present in the url.
const debug = useDebug()
useDocumentReadyState – returns true if document is ready.
const ready = useDocumentReadyState()
useFrame – runs callback on every frame
useInterval – create and dispose intervals.
useInterval(() => {
setCount(count + 1)
},1000)
// Delay in milliseconds or null to stop it
useIsClient – returns true if window is defined.
const isclient = useIsClient()
useIsTouchDevice – returns true if client is using a touch-capable device.
const isTouch = useIsTouchDevice()
useIsVisible – returns true if a reference node is in the viewport.
const { ref, inView } = useIsVisible({ threshold: 0.5, once: true, rootMargin: '0px', root: null })
useMediaQuery – css-like media query support in Javascript.
const match = useMediaQuery('(min-width: 1024px)')
useRect – Get getBoundingClientRect.
const { top, bottom } = useRect(elRef)
useSlots – A React hook for extracting the children of specified component types from a component’s children.
Parameters
• types (array): An array of component types to extract children from. Default: [].
• children (array): The children from which to extract the specified component types. Default: [].
Returns
• An array of children of the specified component types.
const Header = ({ children }) => <header>{children}</header>;
const Footer = ({ children }) => <footer>{children}</footer>;
const MyComponent = ({ children }) => {
const [headerContent, footerContent] = useSlots([Header, Footer], children);
return (
<div>
<div className="header-content">
{headerContent || 'Default Header Content'}
</div>
<div className="footer-content">
{footerContent || 'Default Footer Content'}
</div>
</div>
);
};
const App = () => (
<MyComponent>
<Header>My Header</Header>
<Footer>My Footer</Footer>
</MyComponent>
);
useFoucFix – temporary fix for FOUC bug from Next js
useWindowSize – returns window dimensions
const { width, height } = useWindowSize()
useIntersectionObserver – Observe element visibility using IntersectionObserver
Parameters
• root (HTMLElement | null): Viewport for checking visibility.
• rootMargin (string): Margin around the root.
• threshold (number): Visibility threshold (0 to 1).
• once (boolean): Disconnect after first intersection.
• lazy (boolean): Update state lazily.
• callback (function): Function called on visibility change.
const App = () => {
const [setElement, entry] = useIntersectionObserver({ threshold: 0.5 });
return <div ref={setElement}>Observe me</div>;
};
useIsomorphicLayoutEffect – identical to useEffect, but fires synchronously after all DOM mutations.
useIsomorphicLayoutEffect(() => {
console.log(useIsomorphicLayoutEffect)
}, [])
useCopyToClipboard – provides a copy method to save a string in the clipboard and the copied value
const [value, copy] = useCopyToClipboard()
const handleClick = () => {
copy('copy me', callback)
}
<button onClick={handleClick}>Meh</button>
useResizeObserver – A React hook for observing element dimensions using ResizeObserver, with optional debouncing and lazy state updates.
Parameters
• lazy (boolean): If true, returns a getter for the current entry instead of state. Default: false.
• debounce (number): Delay in ms between resize events. Default: 500.
• box (string): Box model to observe ('border-box', 'content-box'). Default: 'border-box'.
• callback (function): Called on resize with ResizeObserverEntry. Default: () => {}.
const MyComponent = () => {
const [setElement, entry] = useResizeObserver({
debounce: 300,
callback: (entry) => {
console.log('Resized:', entry);
},
});
useEffect(() => {
if (entry) {
console.log('Current entry:', entry);
}
}, [entry]);
return (
<div ref={setElement} style={{ resize: 'both', overflow: 'auto', width: 200, height: 200 }}>
Resize me!
</div>
);
};
useRealViewport – Set CSS variables for viewport units on browsers.
CSS Variables
• --vw: Viewport width.
• --dvh: Dynamic viewport height.
• --svh: Small viewport height.
• --lvh: Logical viewport height (1vh).
const App = () => {
useRealViewport();
return <YourComponent />;
};
useEventListener – it does what the name says. Pass in an event and a callback function as the second parameter
const elRef = useRef<HTMLElement>(null)
const documentRef = useRef<Document>(document)
// for window based event
useEventListener('scroll', () => console.log('scroll'))
// for document based event
useEventListener('visibilitychange', () => console.log('visibilitychange'), documentRef)
// for element based event
useEventListener('click', () => console.log('clicked'), elRef)
useDebounce – uses an internal timer to update the variable every x seconds (2nd parameter)
const [value, setValue] = useState<string>('')
const debouncedValue = useDebounce<string>(value, 500)
useDebounceFn – uses an internal timer to execute the callback function every x seconds (2nd parameter)
const debouncedFn = useDebounceFn(() => {
console.log('This function is debounced!');
}, 500);
useLazyState – A React hook for lazy state management with a callback on state updates.
Parameters:
• initialValue (T): Initial state value.
• callback ((newValue: T, oldValue: T) => void): Function called on state change.
Returns:
• get (() => T): Get current state.
• set ((value: T | ((prevState: T) => T)) => void): Set state.
const [getState, setState] = useLazyState(0, (newValue, oldValue) => {
console.log(`State changed from ${oldValue} to ${newValue}`);
});
setState(1); // Logs: "State changed from 0 to 1"
const currentState = getState(); // currentState is 1
useEffectOnce – useEffect that's executed only one time, on mount.
useEffectOnce(() => {
console.log('Triggered only on mount')
})
useUpdateEffect – useEffect that ignores the first invocation (e.g. on mount)
useUpdateEffect(() => {
console.log('ignores on mount', data)
}, [data])
useIsMounted – it returns a callback that returns true if the component is mounted
const isMounted = useIsMounted()
useFirstMountState – it returns true if component is just mounted.
const isFirstMountState = useFirstMountState()
useLocalStorage – it is used similarly to the useState hook. It takes in 2 parameters, the key and the initial value.
const [value, setValue, removeValue] = useLocalStorage('valueKey', [])
useSessionStorage – pretty much the same as useLocalStorage just for session storage
const [value, setValue] = useSessionStorage('valueKey', [])
const [value, setValue] = useSessionStorage('valueKey', [])
const {isVisible} = useIOSToolbarState()
useScript(url)
useFavicon(url);
useKeySequence({ sequence: 'sequence', callback: () => console.log('yay') })
const idle = useIdle(5000);
useDocumentTitle('new title');
const orientation = useOrientation();
usePageLeave(() => {
console.log('come back')
});
const [value, updateCookie, deleteCookie] = useCookie(cookieName: string);
export default function App() {
const [ref, hovering] = useHover();
return (
<div ref={ref}>
IsHovering? {hovering ? "Yes" : "No"}
</div>
);
}
const [list, { set, push, removeAt, insertAt, updateAt, clear }] = useList([
"one",
"two",
"three",
]);
console.log(list)
const random = () => {
set([1, 2, 3])
push([1, 2, 3])
removeAt(1)
insertAt(1, "okay")
updateAt(1, "okay")
clear()
}
- Etuk Josiah Benjamin (@jobenetuk) – Studio Lumio