What Shadow DOM is and why it's a game-changer for web development How to implement Shadow DOM to isolate third-party HTML content Real-world techniques for embedding HTML templates without CSS ...
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There may come a time when you find it important to trap focus within a DOM node — so that when a user hits Tab or Shift+Tab or clicks around, she can't escape a certain cycle of focusable elements.
The "New"-menu allows to create new entries or upload files, it is also possible for other apps to register their own actions here. It is possible to provide your own sidebar tabs for the files app.