[hungrymagnum]

This can be applied for a success (change the button to a green tick mark) or an unsuccessful action (change the button to a red x mark).

But what if you want to give details on why the action was unsuccessful? How do you show it near the button or change the button itself?

[chao-]

>How do you show it near the button?

What stops you from placing these details you want as near as is reasonable to a button? Alternatively, placing the details near or in some container for the data/entity/element that the button relates to?

[wildrhythms]

Good idea, but impossible to do when the user switches away from where the initial async interaction began.