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Always on focus

Prevents websites from knowing that you switched tabs or unfocused the window

当前为 2023-04-19 提交的版本，查看 最新版本。

  1. // ==UserScript==
  2. // @name          Always on focus
  3. // @namespace     https://github.com/daijro/always-on-focus
  4. // @author        daijro
  5. // @version       1.2
  6. // @description   Prevents websites from knowing that you switched tabs or unfocused the window
  7. // @include       *
  8. // @run-at        document-start
  9. // ==/UserScript==
  10.  
  11.  
  12. unsafeWindow.onblur = null;
  13. unsafeWindow.blurred = false;
  14.  
  15. unsafeWindow.document.hasFocus = () => true;
  16. unsafeWindow.window.onFocus = () => true;
  17.  
  18. // kill dom property names
  19. [
  20.     "hidden",
  21.     "mozHidden",
  22.     "msHidden",
  23.     "webkitHidden"
  24. ].forEach(prop_name => {
  25.     Object.defineProperty(document, prop_name, {value: false});
  26. })
  27.  
  28. Object.defineProperty(document, "visibilityState", {get: () => "visible", value: "visible"});
  29. Object.defineProperty(document, "webkitVisibilityState", {get: () => "visible", value: "visible"});
  30.  
  31. unsafeWindow.document.onvisibilitychange = undefined;
  32.  
  33.  
  34. var event_handler = (event) => {
  35.     if (event.type === 'blur' && event.target instanceof HTMLInputElement) {
  36.         return // exclude input elements
  37.     }
  38.     event.preventDefault();
  39.     event.stopPropagation();
  40.     event.stopImmediatePropagation();
  41. }
  42.  
  43. // kill event listeners
  44. [
  45.     "visibilitychange",
  46.     "webkitvisibilitychange",
  47.     "blur",
  48.     "mozvisibilitychange",
  49.     "msvisibilitychange"
  50. ].forEach(event_name => {
  51.     window.addEventListener(event_name, event_handler, true);
  52.     document.addEventListener(event_name, event_handler, true);
  53. })