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window.CharacterData is undefined, but when dragonfly is open, it's native function, how to fix it?

  • I'm trying to access the window.CharacterData, when I do it using the Dragonfly console, no problems, it exists and return the native function.

    But when I close the Dragonfly console, and reload the page, the same window.CharacterData return as undefined.

    How it can be fixed? I need that it return the native function with debugger closed.