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26 lines
606 B
TypeScript
26 lines
606 B
TypeScript
export interface Rect {
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width: number;
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height: number;
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x?: number;
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y?: number;
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}
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/**
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* Efficiently observe size changes on an element. Depends on the `ResizeObserver` api,
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* and polyfills are needed in older browsers.
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*
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* ```ts
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* const [ref, attachRef] = useCallbackRef(null);
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*
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* const rect = useResizeObserver(ref);
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*
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* return (
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* <div ref={attachRef}>
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* {JSON.stringify(rect)}
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* </div>
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* )
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* ```
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*
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* @param element The DOM element to observe
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*/
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export default function useResizeObserver<TElement extends Element>(element: TElement | null | undefined): Rect | null;
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