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23 lines
839 B
TypeScript
23 lines
839 B
TypeScript
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/// <reference types="react" />
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declare type CallbackRef<T> = (ref: T | null) => void;
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declare type Ref<T> = React.MutableRefObject<T> | CallbackRef<T>;
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export declare function mergeRefs<T>(refA?: Ref<T> | null, refB?: Ref<T> | null): (value: T | null) => void;
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/**
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* Create and returns a single callback ref composed from two other Refs.
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*
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* ```tsx
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* const Button = React.forwardRef((props, ref) => {
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* const [element, attachRef] = useCallbackRef<HTMLButtonElement>();
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* const mergedRef = useMergedRefs(ref, attachRef);
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*
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* return <button ref={mergedRef} {...props}/>
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* })
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* ```
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*
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* @param refA A Callback or mutable Ref
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* @param refB A Callback or mutable Ref
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* @category refs
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*/
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declare function useMergedRefs<T>(refA?: Ref<T> | null, refB?: Ref<T> | null): (value: T | null) => void;
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export default useMergedRefs;
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