The **node‑is‑nullish** package provides a tiny utility function `isNull(value)` that determines whether a value should be considered *nullish*—i.e., `null`, `undefined`, the empty string, `NaN`, or any object/function that has no non‑nullish enumerable properties. It’s aimed at JavaScript/Node developers who need a more nuanced “empty” check than simple falsiness when validating inputs or cleaning data.