See [1] and [2] for an assessment of when (not) to use them. They are particularly ineffective for protecting the user against errors, except on systems which

See [1] and [2] for an assessment of when (not) to use them. They are particularly ineffective for protecting the user against errors, except on systems which use them very sparingly (such as in the web, thanks to browsers adopting non-modal bars for most warnings and search actions.) We older netizens remember the nightmare that was every other web page throwing a modal alert(); that blocked the browser on all the open tabs.) [1] https://en.wikipedia.org/wiki/Modal_window#Design https://en.wikipedia.org/wiki/Modal_window#Design [2] https://en.wikipedia.org/wiki/Mode_(computer_interface)#Assessment https://en.wikipedia.org/wiki/Mode_(computer_interface)#Asse...