Version Details and Security Vulnerabilities

TypeScript 5.5.4 is a minor release following version 5.5.3, both iterations of Microsoft's language for application-scale JavaScript development. While the core description remains consistent, subtle differences in build characteristics and release timing emerge. The newer 5.5.4 version was released on July 22, 2024, while 5.5.3 arrived earlier on July 1, 2024. A key difference lies in the unpacked size of the package: 5.5.4 weighs in at 21,870,234 bytes compared to 5.5.3's 21,861,616 bytes, a slight increase suggesting bug fixes, performance improvements or minor feature additions.

For developers, both versions continue to leverage a robust suite of development dependencies, including tools for testing (mocha, chai, c8), linting (eslint, @typescript-eslint), build processes (esbuild), and utilities (glob, which, minimist). Notably, major dependency versions like @typescript-eslint and eslint are aligned between the two, potentially easing the upgrade process. The inclusion of @dprint suggests ongoing efforts toward code formatting and consistency. Developers should investigate the changelog for the exact list of changes and bugfixes of the newer version to evaluate if the upgrade is worth it for their specific usecase. Since the dependency list is identical the upgrade should be painless and without breaking changes.