Read-only cancels the refresh on visitor browser

Yes this is a known bug that is on the list for the free version. For now the visitor must refresh the page in order to view latest/new chat messages.

I hope this helps, let me know if I can provide any further information.

I used code to hide textbox to visitors, So they can not submit ??
Another issue that sound alert not always played in mobile devices, I use 8 seconds sound.

ul#sac-messages li.sac-chat-message::before { content: "[ 'attr(data-time)' ]"; color: #777; }

This code is not working well, This is the output [‘attr(data-time)’]

I don’t think the plugin has any audio clips that are 8 seconds long. Try just using one of the provided sound fx should work normally in all devices/browsers.

I have uploaded custom message audio file and renamed it.
What should be it maximum length?
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ul#sac-messages li.sac-chat-message::before { content: "[ 'attr(data-time)' ]"; color: #777; }

The code above do not show the time and hour but this text : [‘attr(data-time)’]

1. “I have uploaded custom message audio file and renamed it.
   What should be it maximum length?”

There are no specific min/max limits. The goal though, to work well in all browsers and devices, is to keep the file size as small as possible. For example, look at the file sizes (not length, but size) of the default audio files to get a better idea of what to aim for.

2. “The code above do not show the time and hour but this text : [‘attr(data-time)’]”

I’m not remembering that code, can you let me know where you found it? I may be able to help but need more context.

This code is taken from the FAQ in order to see time and date near each message

Thanks, I just tested and it’s working fine. Maybe check to make sure all the quotes are straight and not fancy/curly.