Env API

The Environment API provides information about the current Epos runtime context.
It helps you detect where your code is running — in a web page, popup, side panel, or background — and identify the active tab.

epos.env.tabId

The numeric ID of the current browser tab. Useful when sending messages or managing tab-specific data.

epos.env.isWeb

true if the code runs inside a web page (including iframes injected by Epos).

epos.env.isPopup

true if running inside the extension popup.

epos.env.isSidePanel

true if running inside the side panel context.

epos.env.isBackground

true if running in the background context (service worker or background frame).