Major 3.0 (#118)

Co-authored-by: Maison da Silva <maisonmdsgreen@hotmail.com>

utils/watchTabSelection.ts

@@ -0,0 +1,20 @@
+import { Unwatch } from "wxt/storage";
+
+export default function watchTabSelection(onChange: TabSelectChangeHandler): Unwatch
+{
+	const handleTabSelection = async () =>
+	{
+		const highlightedTabs = await browser.tabs.query({
+			currentWindow: true,
+			highlighted: true
+		});
+		onChange(highlightedTabs.length > 1 ? "selected" : "all");
+	};
+
+	handleTabSelection();
+	browser.tabs.onHighlighted.addListener(handleTabSelection);
+
+	return () => browser.tabs.onHighlighted.removeListener(handleTabSelection);
+}
+
+export type TabSelectChangeHandler = (selection: "all" | "selected") => void;