Forums

See: https://www.group-technical.com/forums
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Mostly the forums work, but the search and upload functions are broken by some kind of collision raising modal dialogs. When I change the theme on that site to protostar, which does not use bootstrap, the ChronoForums modal dialogs work great.
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How can I remove or change the dialog function so it works with the existing bootstrap code please?

Are there any errors in your javascript console?

Yes, but I can't make sense of them.
They only appear when the them I made which uses bootstrap is used.
Am I correct in thinking ChronoForums doesn't use bootstrap at all?
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Here's the log:
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bootstrap.js:1207 Uncaught TypeError: data[option] is not a function
    at HTMLDivElement.<anonymous> (bootstrap.js:1207)
    at Function.each (jquery.min.js?abd87c2fb15e4acf925a65046a20a926:2)
    at a.fn.init.each (jquery.min.js?abd87c2fb15e4acf925a65046a20a926:2)
    at a.fn.init.Plugin [as modal] (bootstrap.js:1201)
    at Object.$.G2.actions2.fns (g2.actions2.js:70)
    at Object.<anonymous> (g2.actions2.js:305)
    at Function.each (jquery.min.js?abd87c2fb15e4acf925a65046a20a926:2)
    at Object.$.G2.actions2.run (g2.actions2.js:304)
    at Object.success (g2.actions2.js:276)
    at u (jquery.min.js?abd87c2fb15e4acf925a65046a20a926:2)
(anonymous) @ bootstrap.js:1207
each @ jquery.min.js?abd87c2fb15e4acf925a65046a20a926:2
each @ jquery.min.js?abd87c2fb15e4acf925a65046a20a926:2
Plugin @ bootstrap.js:1201
$.G2.actions2.fns @ g2.actions2.js:70
(anonymous) @ g2.actions2.js:305
each @ jquery.min.js?abd87c2fb15e4acf925a65046a20a926:2
$.G2.actions2.run @ g2.actions2.js:304
success @ g2.actions2.js:276
u @ jquery.min.js?abd87c2fb15e4acf925a65046a20a926:2
fireWith @ jquery.min.js?abd87c2fb15e4acf925a65046a20a926:2
C @ jquery.min.js?abd87c2fb15e4acf925a65046a20a926:2
n @ jquery.min.js?abd87c2fb15e4acf925a65046a20a926:2
XMLHttpRequest.send (async)
send @ jquery.min.js?abd87c2fb15e4acf925a65046a20a926:2
ajax @ jquery.min.js?abd87c2fb15e4acf925a65046a20a926:2
$.G2.actions2.fns @ g2.actions2.js:197
(anonymous) @ g2.actions2.js:305
each @ jquery.min.js?abd87c2fb15e4acf925a65046a20a926:2
$.G2.actions2.run @ g2.actions2.js:304
(anonymous) @ g2.actions2.js:320
dispatch @ jquery.min.js?abd87c2fb15e4acf925a65046a20a926:2
v.handle @ jquery.min.js?abd87c2fb15e4acf925a65046a20a926:2

Ouch nasty. Some templates let you attach different versions of bootstrap, or have it in no conflict mode, is that a possibility with your template at all?

Hi & thanks for your help. Nope, because its my own template :-) Bootstrap is needed for is the menu module, which I didn't write and actually does have an option to override bootstrap CSS, but nothing else. I think the clue to this is to recognise it only goes wrong when there is a dialog from ChronoForums, such as uploading a file, doing a search etc, and that's because it wants to dim the background and make the dialog the focus. I am not very strong on JS, but can see in those circumstances the page source is modified such that the page's <body> tag becomes

<body class="modal-open">

for my template with chronoforums, yet when I use the protostar template for example, which doesn't show the error, the line becomes

<body class="site com_chronoforums2 view-board no-layout no-task itemid-218 dimmable dimmed">

You can see this at the test site I mentioned earlier. I'm ironing out all these issues before I go live on the actual site.
If anyone has tips on what I can look for now I'd be very grateful.

Sorry but if you've made the template then you're going to have to stop it from conflicting. Not sure this is one I can help with sorry, you could ask the dev using the contact link above

I made some progress. I did a clean Joomla install, and installed only chronoforums and the bootstrap menu which is here btw https://github.com/joomdigi/mod_bootstrapnav. I know its old but it does exactly what I want. Anyway, with that setup there is no problem. So either it's another module or the way I've customised that one, which is quite extensively. Thanks - I'm not there yet, but I'm sure you're familiar with how this detective work goes!
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Hey whilst I'm here I just love Chronoforums and the way it looks & acts. It's perfect for what I plan to use it for.