The **phantomjs‑polyfill‑object‑assign** package adds the missing `Object.assign` method to PhantomJS environments. It’s a small JavaScript polyfill that can be installed via npm and included (e.g., in a Karma test setup) to enable ES‑6 style object property copying when running tests or scripts in PhantomJS. It’s intended for developers using PhantomJS—particularly those writing front‑end unit tests with Karma—who need `Object.assign` support.