# `stable` Addon When generating class names, `nano-css` stringifies CSS-like objects to compute a hash and generate a unique class name. By default it uses `JSON.stringify`, which is not stable. This addon makes `nano-css` use [`fastest-stable-stringify`](https://github.com/streamich/fastest-stable-stringify) to generate fast predictable hashes across JavaScript runtimes. ## Installation Simply install `stable` addon. Read more about the [Addon Installation](./Addons.md#addon-installation).