# Developer Guide Everything you need to set up, understand, and contribute to `quantem.widget`. Each widget has a Python backend (data processing, GPU computation) and a JavaScript frontend (rendering, user interaction), connected by [anywidget](https://anywidget.dev). For contributing to the core `quantem` library, see [ophusgroup/dev](https://github.com/ophusgroup/dev). ```{toctree} :maxdepth: 2 getting-started building-widgets reference ```