react-dnd/dist/hooks/useDrop/useAccept.js

Drag and Drop for React

import { invariant } from '@react-dnd/invariant';
import { useMemo } from 'react';
/**
 * Internal utility hook to get an array-version of spec.accept.
 * The main utility here is that we aren't creating a new array on every render if a non-array spec.accept is passed in.
 * @param spec
 */ export function useAccept(spec) {
    const { accept  } = spec;
    return useMemo(()=>{
        invariant(spec.accept != null, 'accept must be defined');
        return Array.isArray(accept) ? accept : [
            accept
        ];
    }, [
        accept
    ]);
}

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