Will references be preserved?

[davidtlee]

Here is an example object:

    card =                                                                               
      content: 'hi'                                                                      
    room =                                                                               
      card: card                                                                         
      post:                                                                              
        card: card      

In this object, room.card and room.post.card point to the same object. Therefore, if I were to execute room.card.content = "bye", then room.post.card.content would also equal "bye"

My question is whether this is still preserved after saving into $localForage, i.e.

    $localForage.setItem("room_key", room).then ->                                           
      $localForage.getItem("room_key").then (r) ->                                           
        r.card.content = "hrmm"           
        // does r.post.card.content also equal "hrmm"?                                               
        console.log r        

My hope is that it does. When I tested it, it did seem to work, which is great. But that confused me because I thought that it should be saving it as a JSON string and then parsing it back? If that were true, then it seems like the object reference shouldn't be preserved.

So I just wanted to check whether this is true in general, or whether it is some sort of edge case where it's preserved only because I retrieved it immediately after setting it. Thanks!

[gabe0x02]

Looks like it depends on the database you are using. indexedDB supports it.

http://stackoverflow.com/questions/22546304/what-data-types-does-indexeddb-support

Other drivers clearly use JSON in the localForage as you say:
https://github.com/mozilla/localForage/blob/20503c5d844c8884aa69f2328b03fbb064a0625b/src/utils/serializer.js#L127

A jsfiddle that I hacked from the localforage page:
http://jsfiddle.net/ryfo1jk4/47/

[davidtlee]

Ahhhhhhh! Thanks @gabe0x02, makes sense, no wonder!