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/compact.md.
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    compact (Functional Programming) es-toolkit

    Creates a function that removes falsey values from an array. Use it with pipe.

    const result = pipe(array, compact());
    Info

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

    Usage

    compact removes false, null, undefined, 0, -0, 0n, an empty string, and NaN. It is lazy-capable inside pipe, so a trailing take can stop the walk early.

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

pipe([0, 1, false, 2, '', 3], compact()); // => [1, 2, 3]

    Parameters

    This function takes no arguments; call it as compact().

    Returns

    A function that maps a readonly T[] to an array without falsey values.

    (array: readonly T[]) => Array<NotFalsey<T>>
    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.