@lucid-softworks/object-path-set

Immutably write through a string path or property-key segment array, cloning only traversed branches. Missing arrays and objects are created automatically.

import { setPath } from "@lucid-softworks/object-path-set";

const next = setPath(state, "users[0].name", "Ada");

For prototype-pollution safety, __proto__, prototype, and constructor segments throw UnsafeObjectPathError. Numeric segments must be non-negative safe integers. Own enumerable string and symbol properties are copied without assignment-based prototype mutation.