Istanbul Middleware for TypeScript

istanbul-middleware-ts is a TypeScript-first middleware designed for integrating Istanbul code coverage reporting into Node.js applications, primarily with Express.js. It provides HTTP endpoints to collect, reset, merge, report, and download code coverage data. The package is currently at version 1.1.4, indicating active maintenance with several recent minor releases, and offers complete TypeScript support with type definitions. Its release cadence appears to be driven by feature additions and bug fixes within the 1.x series. A key differentiator is its modern TypeScript implementation that is compatible with the API of the original `istanbul-middleware`, making it a drop-in replacement for users seeking enhanced type safety and up-to-date Node.js practices. It offers robust functionality for CI/CD pipelines and local development environments by enabling dynamic coverage data management, HTML report generation, and LCOV/ZIP package downloads, alongside features like differential coverage reporting against git targets.