Express Partial Response Middleware

express-partial-response is an Express.js middleware designed to filter parts of JSON responses based on a `fields` query-string parameter. It mimics the "Partial Response" feature found in Google APIs, allowing clients to request only a subset of data from an API endpoint, thereby reducing bandwidth and processing on the client side. The current stable version is 1.0.4. The project appears to be in a maintenance state, with no recent major updates mentioned, suggesting a stable and complete feature set rather than active development. Its core functionality is powered by the `json-mask` library, which handles the actual JSON object filtering according to the specified field syntax. This middleware differentiates itself by providing a direct, out-of-the-box integration for Express applications, simplifying the implementation of partial responses without requiring manual integration of `json-mask` into every route.