Unsure of Where to put filter

Thanks for reaching out! Apologies on the delayed response, I’ve been out of town. This would work in your functions.php file, however I don’t think that plugin developer gave you the correct slug. That slug is for a function, not a script, and he is hooking it directly into the wp_head hook.

I took a look through the other plugins code and it looks like they’re using a slug script to enqueue the nicescroll script. Try:

add_filter( 'stf_exclude_scripts', 'stf_custom_header_scripts', 10, 1 );
function stf_custom_header_scripts( $scripts ) {
    $scripts[] = 'script';
    return $scripts;
}

Because they are hooking some in-line javascript directly into the wp_head in addition to this javascript file, it might not work. Once you have this up, check your HTML source and see if the jquery and nicescroll scripts are above the custom javascript output.

Let me know if that doesn’t work!

Cheers,
Joshua

It does not work but thank you so much for trying!

What doesn’t work – the scripts are not outputting in the head or the custom scrollbar doesn’t work? I’d like to confirm that my plugin is working as intended, and I’m happy to help you resolve any issue with it if not.

Assuming that the filter above is working, then the issue is likely that you’ll need some more work with the plugins hooks to get the proper sequencing for the scrollbar to function.

Ideally, it would be in this order: jquery, nicescroll, in-line script.

What is likely happening, with that filter, is: in-line script, jquery, nicescroll.

Because the in-line script is not enqueued, it is being served up separately from the enqueuing processes and isn’t moved by Scripts to Footer. However, the nicescroll javascript is enqueued and so it is being moved (the filter above should place it, and jQuery, in the header).

It’s likely the issue is that the in-line script from your scrollbar plugin is firing prior to Scripts to Footer header scripts (also hooked into wp_head). You could try adding this to your functions.php file, along with the filter from my previous post:

if( function_exists( 'scrollbar_add_scripts_to_head' ) ) {
    remove_action( 'wp_head', 'scrollbar_add_scripts_to_head' );
    add_action( 'wp_head', 'scrollbar_add_scripts_to_head', 15 );
}

This will place that in-line script from the scrollbar plugin below any scripts outputted by Scripts to Footer (the if statement is protection for if you ever deactivate that plugin or update it). This, with the previous filter (assuming that worked for you) should resolve it. Otherwise, I’d recommend reaching out to the scrollbar developer again.

Wanted to follow up on this, where you able to get the above code to work? I really think this is just a sequencing issue.

Anyway, if you have any other issues let me know! I’m going to close this thread for now.

I somehow missed this follow up. Thank you, very cool of you to follow up so well. I really appreciate it. I have not checked yet, but will hopefully within the week. Thanks again and I will follow up.

Hey, no worries! Let me know if you have any issues, and/or if this solution worked for you. Cheers!