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For basic popup structure see Popups.
The message popup may contain a checkbox, allowing the user to declare a statement, e.g. I understand or Don’t show this again.
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Placement and Positioning
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A message popup is very intrusive. Use it only for important messages or long help messages. For lower-priority messages → use a Toast.
Keep the title short and informative.
Keep the message text short and informative.
A common use is when the user tries to leave a page without saving their work. In this case, a warning popup will appear:
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Design
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