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並前往https://tech.trivago.com/2020/11/17/exploring-the-page-visibility-api-for-detecting-page-background-state/

Exploring the Page Visibility API for Detecting Page ...

visibilityState attribute inside the event handler. ... it stated that the visibility state change events would be run before the pagehide ...

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查詢 「visibilityState」的人也找了：

  1. Visibilitychange
    2.
  2. Page Visibility API
    3.
  3. Page Lifecycle API
    4.
  4. onVisibilityChange
    5.
  5. Pagehide
    6.
  6. Pageshow
    7.
  7. Document hasFocus
    8.
  8. Pageshow event
    9.