up:fragment:kept
This event is emitted when an existing element has been kept during a page update.
Event listeners can inspect the discarded update through event.$newElement and event.newData and then modify the preserved element when necessary.
event.$newElement
event.newData
The fragment that has been kept.
The discarded element.
The value of the up-data attribute of the discarded element, parsed as a JSON object.
up-data
