Can’t find variable: jQuery ?

Hi there,

Your server is using mod_pagespeed, therefore although FVM is installed, you still have most JS and CSS files on the HTML. In other words, FVM is there, but it’s not doing anything much, because mod_pagespeed on the server side, is trying to do the same as FVM.

Notice here, how even the files generated by FVM are being overwritten by mod_pagespeed
https://pasteboard.co/HFFroJr.png

Having said that, your theme seems to have been customized in a way that it tries to use jQuery before it’s actually enqueued on the page.

Here you can see it, the highlighted jQuery call… but before that, a jquery.js should have been included. https://pasteboard.co/HFFsB72.png

I’m guessing you have some other plugin or some code, trying to move javascript to the footer… so this kind of thing will happen.

My suggestion for you… if you are not a developer, disable the mod_pagespeed and stop trying to optimize the site by moving scripts around to the footer.
FVM alone, without pagespeed module and without moving scripts to the footer is much better than mod_pagespeed and other hacks.

Alternatively, removing FVM and keeping only mod_pagespeed may work… so don’t try to duplicate things, by using multiple plugins that do the same thing, or by using server and plugins that do the same (they will conflict).

Please hire a developer to help you do speed optimization… or keep it as simple as possible.

Yes, but apart from disabling pagespeed there may be a lot of things going on.

You may have a conflict due to merging JS or css files, so kindly read the faqs on how to use the ignore list: https://ww.wp.xz.cn/plugins/fast-velocity-minify/#faq

Or your theme may have had modifications that do not follow the wordpress api standards.

Things like double minification (ie: your theme is minifying js files, or you have other plugins doing it), or the simple act of merging js files together (even by copy paste), can cause conflicts.

Of course in those situations, disabling FVM will fix it, but again, your files are no longer merged. And the same is true to any other plugin that does the same thing.

Kindly review the faqs on how to use the ignore list, disable pagespeed module and try it again.

You may simply be lacking the skill to configure the plugin properly, so hiring a developer may be the best option.

Alternatively, I suggest using the autoptimize plugin, as it is usually easier to use and sometimes, achieve similar results depending on your site.

If your message is specifically about not finding the variable jQuery, you are probably using the option to defer javascript. That message is telling you, that jQuery is not found because you have deferred it.

You will need to deselect the option to defer javascript on the plugin settings for your site to work. It’s not a plugin issue… but rather a requirement for your theme or plugins (render blocking javascript).

Again, a developer may be the only option to achieve better rankings.