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9DB Raid Finder: Fix focus detection

Fixes the focus detection on the 9DB Pokémon GO Raid Finder

  1. // ==UserScript==
  2. // @name        9DB Raid Finder: Fix focus detection
  3. // @namespace   m43v6blcjzeaiq6oh9
  4. // @match       https://9db.jp/pokego/data/62
  5. // @match       https://9db.jp/pokemongo/data/9906
  6. // @grant       none
  7. // @version     1.0
  8. // @description Fixes the focus detection on the 9DB Pokémon GO Raid Finder
  9. // @run-at      document-start
  10. // @inject-into content
  11. // @license     MIT
  12. // ==/UserScript==
  13.  
  14. (function () {
  15. 	"use strict";
  16.  
  17. 	const { CustomEvent } = window, { WeakSet } = globalThis;
  18.  
  19. 	// Block blur/focus events on window,
  20. 	// except the fake ones we create
  21. 	const whitelistedEvents = new WeakSet();
  22. 	const filterEvents = (event) => {
  23. 		// .delete() returns true if the element was actually removed
  24. 		if (!whitelistedEvents.delete(event)) {
  25. 			event.stopImmediatePropagation?.();
  26. 		}
  27. 	};
  28.  
  29. 	window.addEventListener("blur",  filterEvents, { passive: true });
  30. 	window.addEventListener("focus", filterEvents, { passive: true });
  31.  
  32. 	// Convert visibility events to blur/focus events
  33. 	window.addEventListener("visibilitychange", function () {
  34. 		const fakeEvent = new CustomEvent((document.visibilityState === "hidden") ? "blur" : "focus");
  35.  
  36. 		whitelistedEvents.add(fakeEvent);
  37. 		this.dispatchEvent(fakeEvent);
  38. 	});
  39. })();