Missing reference list Icons

[SaoiBain]

The library is great, however it would be possible to list the group of icons available for use with the alert windows; since when trying to use other icons these are not shown possibly because they are not in the icon library.

[SanderVerkuil]

Icons are not provided by this library, and it depends on which icon library you use. The default configuration appears to be for font awesome, so take a look at FontAwesome 5 Cheatsheet if using their version 5.