pop/src/getKey.js

Pop is a [Hyperapp](https://github.com/hyperapp/hyperapp) / [Ultradom](https://github.com/ultradom/ultradom) spin-off project — yet another micro-framework for creating graphical user interfaces. This is not the final title, but let's go with that for now

export function getKey(node) {
  return node ? node.key : null
}