1

Aside from Bootstrap's alerts page I am unable to find any material guidelines for alerts that we can use in the development of a notification bar.

Are there any good guidelines out there based on user behaviour?

3

Material guidelines have 3 types of notification components.

Under the Snackbar section, it recommends which component to use based on the amount of interruption or attention that's needed from the user: enter image description here

I don't know your use case, or your definition of 'Alert', but you have two other options:

Alert Dialog

Alert dialogs interrupt users with urgent information, details, or actions.

Banners

A banner displays an important, succinct message, and provides actions for users to address (or dismiss the banner). It requires a user action to be dismissed.

  • Many thanks for this Mike, that is very useful. The alert I am implementing is a banner with an icon, message and dismissal cross. In our case the banner is above/at the top of the top bar. – Mike Poole Feb 26 at 8:01

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