June 2011
Intermediate to advanced
344 pages
8h 35m
English
You should never interrupt a user just to inform her that something has happened.[93]

What people are actually seeing in those cases is something like this:

If the information is not particularly important, don’t show it. If it is important but no immediate action is required, show the information in a way that does not interrupt your users. For example, you could use a nonmodal,[94] nonintrusive way of alerting them. Here’s how HP’s webOS shows new messages to the user:
When a new message arrives, ...
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