Implement Document.GarbageCollect in JS SDK

[hackerwins]

Not long ago we introduced the Garbage Collection feature in Yorkie.

• About Garbage Collection in Yorkie: Garbage collection yorkie#3

And we implemented Document.GarbageCollect in Go.

• Document.GarbageCollect: Add Document.GarbageCollect yorkie#55

We also need to implement Document.GarbageCollect function in JS SDK. Then we need to add logic to execute GarbageCollect by receiving the MinSyncedTicket in PushPull's response.

• https://github.com/yorkie-team/yorkie/blob/0597a6275ede944012fc7d19cb59f4bf8b4d2996/pkg/document/document.go#L135
• https://github.com/yorkie-team/yorkie-js-sdk/blob/master/src/document/document.ts#L141

[mojosoeun]

@hackerwins Hello. Could I try this issue?

[hackerwins]

@mojosoeun Yes of course. Please let me know if you need help.

[semin-park]

How is this going?
I'm also interested in this issue, so if there's anything I can help with, please let me know!

[mojosoeun]

I havent started this issue but I will start it soon due to some other work.

I will let you know if I need help! Thanks!

[mojosoeun]

@hackerwins I found this issue, I was wondering this issue affects implementing garbage collection in JS SDK?

[hackerwins]

@mojosoeun Since GC is performed independently for each replica, It seems that the GC issue does not directly affect the JS SDK.

However, when we actually remove an element marked for deletion, we should be careful not to leave a reference to the removed element in the clone. If there are no references to the deleted object left, the object is likely to be deleted by the JavaScript runtime.