ReactJs hook that joins an Array of Elements with a separating Element.

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ReactJs hook that joins an Array of Elements with a separating Element.

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Last edited Jul 12, 2021

Created on Dec 30, 2021

This example demonstrates a React hook that inserts a separator element between each item in an array of JSX elements, producing a new array where the original items and separators alternate. The hook, `useArrayJoin`, uses `useMemo` to cache the result and relies on `Array.reduce` to iterate through the input array, placing the join element—generated by a callback function—between consecutive items. The code specifically leverages React’s JSX type system and the `useMemo` API to optimize re-renders, with the separator receiving a unique key based on the current index.

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