* @property {string} reload=undefined currently the values defined are `onshow` and `always`. The default `onshow` removes the IntersectionObserver. This means that the content is only loaded once. reloading of the content does not occur.
* @property {string} reloadonshow, always
* @property {string} filter=undefined dom selectors to search for elements, if undefined then everything is taken
* @property {string} filter css selector
* @property {Object[]} processors
* @property {Object} fetch fetch options for the request
* @property {Object} fetch Fetch [see Using Fetch mozilla.org](https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Fetch)