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Troubleshooting ajax/js
I installed a paid theme on my Vanillaforums 2.1. This broke some parts of the forum, although I've gotten around most of it.
The problem I am trying to fix is that with this new theme, the user must refresh the page to see its own reply to threads.
Before, on other themes, it used to "flow" downwards the page and be visible instantly. This is so cool, I want to try and get it back.
I am wondering where I should start to troubleshoot this?
I am not well versed in jQuery/ajax/js, so bear with me please 
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Most browser have a console an inspect tool for debugging. That would be your first bet.
grep is your friend.
I found the source, although the Firefox Dev Console didn't help me, it gave some arcane errors
"TypeError: $(...).iCheck is not a function 56756:720:0
Use of Mutation Events is deprecated. Use MutationObserver instead. jquery.js:3:0
Use of getPreventDefault() is deprecated. Use defaultPrevented instead."
When I disabled the Wysihtml editor, posts started "flowing" again
edit:
it wasn't Wysihtml editor's fault, the new theme doesn't work with any editor.
I would run away from this theme like my life depended on it.
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Almost everyone I've seen selling themes provides support on their own site.
Wouldn't this be the best way to contact them.
At the same time, you might want to warn other people that "such and such theme" causes problems if the author of the theme can't help you after a reasonable amount of time
I may not provide the completed solution you might desire, but I do try to provide honest suggestions to help you solve your issue.