Is there a Stack Exchange WebSocket action for multiple tags?

Question

I'm developing an app to show all new questions for any tags that user is watching in realtime. So instead of using the REST API, I want to use the WebSocket at: wss://qa.sockets.stackexchange.com.

I'm able to observe for any tag with this action: <siteid>-questions-newest-tag-<tagname>

And (looks like) I can observe as many as I need without limit. But when I send multiple actions for multiple tags, and IF a question has multiple tags of my choice together, The server respond me multiple times for a single question. For example javascript and jquery

My current solution is to keep the id of the responds and remove duplicates locally.

So THE QUESTION IS: Is there a built in way to remove duplicates? Like a unique action to get multiple tags or etc. Just like the original site itself.

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Pseudo action desired just for more clarification:

<siteid>-questions-newest-any-tags-<tagname>;<tagname>;<tagname> // any

<siteid>-questions-newest-all-tags-<tagname>;<tagname>;<tagname> // all

Answer 1

No, there is no such way. The unofficial documentation doesn't list such a method, and if you check which websockets are active on a page showing the search results for [tag X] or [tag Y] you'll see it subscribes to two separate tag feed websockets:

The way you describe is also the way I do it for a system which notifies me of potentially interesting questions across the network.