For AI agents: the complete documentation index is available at /llms.txt, the full documentation bundle is available at /llms-full.txt, and this page is available as Markdown at /reference/fp/chunk.md.
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    chunk (Functional Programming) es-toolkit

    Creates a function that splits an array into sub-arrays of a given length. Use it with pipe.

    const result = pipe(array, chunk(size));
    Info

    Prefer the original es-toolkit chunk in ordinary code. Use this fp variant when composing transformations with pipe.

    Usage

    chunk divides an array into sub-arrays, each of length size. When the array cannot be divided evenly, the final chunk holds the remaining elements.

    import { chunk, pipe } from 'es-toolkit/fp';

pipe([1, 2, 3, 4, 5], chunk(2)); // => [[1, 2], [3, 4], [5]]

// A size larger than the array yields a single chunk.
pipe([1, 2, 3], chunk(10)); // => [[1, 2, 3]]

    Parameters

    sizenumberrequired

    The length of each chunk. Must be a positive integer.

    Returns

    A function that maps a readonly T[] to an array of chunks.

    (array: readonly T[]) => T[][]

    Throws

    Throws an error if size is not a positive integer.

    Source: es-toolkit

    Re-exported verbatim from es-toolkit. Implementation, edge cases, and performance behavior are owned upstream. This page mirrors the documentation at the pinned version; the linked source is authoritative.