www programming

p.s The first version will be released maybe in this way but if i can i will improve immediately ... to not overload WP it's possible to load mChat only when chat button clicked.
That's the right way. If an user isn't chatting, there is no need to overload the server in WP side with not useful mChat instances.
A nice preloader when chat button clicked will show: and mChat will load and so presented.
When [i]Close Chat[/i] button clicked, the action should not only toggle the little chat window, but also close any active instance.

if(parent.location.href.indexOf(wordpress_url_page_forum) > -1){
parent.w3all_ajaxup_from_phpbb(w3appendevents); 
}

ok, sorry little delay ... in trouble with an account swap into a site, that make me crazy between siteground cache and more mess ... wow ... last time i was feeling like a stupid, This time i'm feeling lost in the fog like a stupid ahahah ( but it's my birthday :o ... so it's ok )

this error can be resolved (also) in this way:
[code]
if(parent.location.href.indexOf(wordpress_url_page_forum) > -1){
parent.w3all_ajaxup_from_phpbb(w3appendevents);
}[/code]
the code not need to execute when not in page forum, because the js function
[i]w3all_ajaxup_from_phpbb[/i]
come out on wp header html output, only on page forum (with code as is)

but the call to this function is done within overall_footer.html of phpBB, which is called on mchat instances, all over wp if mchat active, also when you're not on page forum.

little delay on releasing new plugin version.
I see any time something to add or improve and not going to the clue due to some other issue that come out maybe into a site i'm following.
Sorry again guys, doing my best in this little trouble days!

Just report, we'll fix!

Uncaught TypeError: parent.w3all_ajaxup_from_phpbb is not a function
    at window.onload (mchat:1525)
window.onload @ mchat:1525
load (async)
(anonymous) @ mchat:1515

ok, that error is removed and this one pop-ups

[code]Uncaught TypeError: parent.w3all_ajaxup_from_phpbb is not a function
at window.onload (mchat:1525)
window.onload @ mchat:1525
load (async)
(anonymous) @ mchat:1515[/code]

// check for # short links like on FAQ page
if ( href.charAt(0) == '#' ){
 return;
}

i now remember what this line has been changed in
it is now:
[code]// check for # short links like on FAQ page
if ( href.charAt(0) == '#' ){
return;
}[/code]
the code line was in the way you report above, but it has been changed and reduced to this to be ok for any link like these (#).

The mChat code and css, has been moved to a separated file: so it can be changed to whatever needed, under any aspect, JS and/or CSS with easy. I will try to throw out the new plugin version within today if possible

Looks like this is a browser specific issue with push notifications within iFrame.

if ( href.charAt(0) == '#' ){

if ( typeof href !== 'undefined' && href.charAt(0) == '#' ){

if not wrong, on actual v3 js code, the unique line that contain this instruction is:
[code]if ( href.charAt(0) == '#' ){[/code]
and if the case, i've not check this, so i've not i've not understand the issue at moment and on what code you get in this: but so the it should just be in case:
[code]if ( typeof href !== 'undefined' && href.charAt(0) == '#' ){[/code]

while on latest mChat code, this code nor exist.
What code are you using?

What action/link you click to have this result?

Code mChat: https://www.axew3.com/w3/forums/viewtopic.php?f=2&t=904#p3397
Code v3 iframe: https://www.axew3.com/w3/2018/12/phpbb-wordpress-template-integration-iframe-v3/