Version Details and Security Vulnerabilities

Ts-jest version 26.1.4 is a minor update from 26.1.3, both acting as preprocessors to enable the use of TypeScript with Jest, offering source map support for easier debugging. Both versions share the same core dependencies like json5, mkdirp, semver, bs-logger, jest-util, make-error, buffer-from, yargs-parser, lodash.memoize, and fast-json-stable-stringify. They also use nearly identical devDependencies, which include tools for linting, formatting, testing, and type checking, ensuring code quality and maintainability. The peer dependencies stay the same, meaning that it works with Jest versions 26 and TypeScript version 3.8 or newer, but older than version 4.

The key difference lies in a potentially updated internal implementation, suggested by a slight increase in the unpacked size of the package (from 186637 to 187129 bytes). This update could include bug fixes, performance improvements, or enhancements that don't necessitate changes to the public API or dependencies. Developers upgrading from 26.1.3 to 26.1.4 may experience improved stability or performance of TypeScript testing within their Jest environment. Both packages contain 82 files. The later version was released about 11 days after the first one.