PopUp from a tags value change

How could I achieve making a popup open when a boolean goes true then close when it goes false?

Gateway tag change script, then use system.perspective.getSessionInfo to get a list of all the active sessions, which you can then use to open the popup on b passing the session id to the open popup function.
You could do it in a tag’s on change event as well

There are actually several posts on this topic already, here are a few…

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