Function nodeAtJson

repos/effect/packages/effect/src/ConfigProvider.ts:732–756

(root: unknown, path: Path)

 * **When to use**
 *
 * Use when you need deterministic config from an in-memory JavaScript value,
 * such as in tests, embedded config, or parsed JSON.
 *
 * **Details**
 *
 * Path traversal follows standard JS rules: string segments index into object
 * keys, numeric segments index into arrays. Returns `undefined` for any
 * path that cannot be resolved. Never fails with `SourceError`.
 *
 * Primitive values (`number`, `boolean`, `bigint`) are stringified via
 * `String(...)`.
 *
 * Literal empty strings are treated as missing values when loaded as values by
 * default. Pass `{ preserveEmptyStrings: true }` to keep empty strings as
 * explicit values.
 *
 * **Gotchas**
 *
 * Object keys and array lengths reflect the original input shape. A leaf value
 * of `""` is treated as missing when that leaf is loaded, but the parent
 * container still reports its original keys or length.
 *
 * **Example** (Providing config from a plain object)
 *
 * ```ts import.meta.vitest
 * import { Config, ConfigProvider, Effect } from "effect"
 *
 * const provider = ConfigProvider.fromUnknown({