Updating sync changes in client

Question

I've got Gun synchronizing across a couple of clients. On one I'm subscribing to the data using map().on(). On the other I delete an item using map().unset(). My question, when I delete an item the changes pops up on the other client as null - I don't seem to have any other information. Is it possible then to keep my client in-sync with changes i.e. in this case remove the item from the list I am showing on the screen? I don't know which item null is referencing to.

Thanks!

Answer 1

@peter great question! Two things:

1. As a background on what the null is doing for deleting, you probably already saw https://gun.eco/docs/Delete .

2. To answer your question, .on callback has multiple parameters, so .on(function(data, key is what you want. Data will be null and you know which item it was based on the key. Check out the rest of the API here!

   Pro tip: If gun.get('list').map().on((data, key) => ...) grabs all the items then gun.get('list').get(key).on(data => ...) is how to grab only that one item from the table!