@tanstack/react-router/dist/cjs/utils.cjs

Modern and scalable routing for React applications

const require_runtime = require("./_virtual/_rolldown/runtime.cjs");
let react = require("react");
react = require_runtime.__toESM(react);
/**
* React.use if available (React 19+), undefined otherwise.
* Use dynamic lookup to avoid Webpack compilation errors with React 18.
*/
var reactUse = react["use"];
var useLayoutEffect = typeof window !== "undefined" ? react.useLayoutEffect : react.useEffect;
/**
* Taken from https://www.developerway.com/posts/implementing-advanced-use-previous-hook#part3
*/
function usePrevious(value) {
	const ref = react.useRef({
		value,
		prev: null
	});
	const current = ref.current.value;
	if (value !== current) ref.current = {
		value,
		prev: current
	};
	return ref.current.prev;
}
/**
* React hook to wrap `IntersectionObserver`.
*
* This hook will create an `IntersectionObserver` and observe the ref passed to it.
*
* When the intersection changes, the callback will be called with the `IntersectionObserverEntry`.
*
* @param ref - The ref to observe
* @param intersectionObserverOptions - The options to pass to the IntersectionObserver
* @param options - The options to pass to the hook
* @param callback - The callback to call when the intersection changes
* @returns The IntersectionObserver instance
* @example
* ```tsx
* const MyComponent = () => {
* const ref = React.useRef<HTMLDivElement>(null)
* useIntersectionObserver(
*  ref,
*  (entry) => { doSomething(entry) },
*  { rootMargin: '10px' },
*  { disabled: false }
* )
* return <div ref={ref} />
* ```
*/
function useIntersectionObserver(ref, callback, intersectionObserverOptions = {}, options = {}) {
	react.useEffect(() => {
		if (!ref.current || options.disabled || typeof IntersectionObserver !== "function") return;
		const observer = new IntersectionObserver(([entry]) => {
			callback(entry);
		}, intersectionObserverOptions);
		observer.observe(ref.current);
		return () => {
			observer.disconnect();
		};
	}, [
		callback,
		intersectionObserverOptions,
		options.disabled,
		ref
	]);
}
/**
* React hook to take a `React.ForwardedRef` and returns a `ref` that can be used on a DOM element.
*
* @param ref - The forwarded ref
* @returns The inner ref returned by `useRef`
* @example
* ```tsx
* const MyComponent = React.forwardRef((props, ref) => {
*  const innerRef = useForwardedRef(ref)
*  return <div ref={innerRef} />
* })
* ```
*/
function useForwardedRef(ref) {
	const innerRef = react.useRef(null);
	react.useImperativeHandle(ref, () => innerRef.current, []);
	return innerRef;
}
//#endregion
exports.reactUse = reactUse;
exports.useForwardedRef = useForwardedRef;
exports.useIntersectionObserver = useIntersectionObserver;
exports.useLayoutEffect = useLayoutEffect;
exports.usePrevious = usePrevious;

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