To check in mobile/Web you can just disconnect your internet connection.In the tool box you will get the webblock like above screenshot drag and drop that in the screen provide the neccessary input (for every screen to check I prefer used that in the bottom bar)Input parameters:
CSSBackgroundOffline (text):Give the css class to show offline colors.
CSSBackgroundOnline (text): Give the CSS class to show online colors.
OnlineMessage: Pass the Message to show online message
OfflineMessage: Pass the Message to show offline message
ContainerCSS : Give the CSS if you want to give for both situtation online as well as offline (Example in both situtation I am showing the same text color white so pass the single text)
TimetoShowMessage (Integer) (ms): Time to show the message for how many seconds to show. means it will automatically disappers in few (given seconds) seconds
This App shows you online and offline notifications immediately after you switch networks.As updated version, just remove the unneeded dependency of outsystems Chart and Outsystems MAP