Themezly

It is vcard now , without x-

https://github.com/WordPress/WordPress/blob/6fd8080e7ee7599b36d4528f72a8ced612130b8c/wp-includes/class-phpmailer.php#L3600-L3601

so this works

function _thz_enable_vcard_upload( $mime_types ){
  	$mime_types['vcf'] = 'text/vcard';
	$mime_types['vcard'] = 'text/vcard';
  	return $mime_types;
}
add_filter('upload_mimes', '_thz_enable_vcard_upload' );

• This reply was modified 5 years, 9 months ago by Themezly. Reason: code fix

Well that was timing ??
No problem.
I managed to find the filter and made gist in case others need it

https://gist.github.com/danyj/ec00057550fd6f73995ab2f8fc8b729f

• This reply was modified 6 years, 1 month ago by Themezly.

Testing on wamp w10, php 7.2 , all images are 403, no bugs no errors

?? thnx!

I hope you dont mind this one,
everything is perfect but the wait time for the first time pageload is bit slower which is understandable , what I did on my joomla cache plugin ( it resembles your 99% ) was a scan pages button that lets admin scan all menu pages via ajax and this way initiates and eliminates that first time load
Process is very simple , get all menu url’s loop and open those pages via ajax

here it is in action https://screencast.com/t/5L8bpAH5

It would be great if you would have time to add something like this.

Great bud , thnx much for clarifying!

Unyson is a framework for developing themes and primarily focused on simplicity and options to extend it. To add ID , class or anything you need , all you have to do is add an option type and output it in the view. It is a 10sec process. Here is my version of adding classes https://prntscr.com/8jjlvr , this is the output, https://prntscr.com/8jjktm .
I am glad that dev team did not do this since my way of doing things might be different than others. They gave us an awesome framework and huge array of options to extend it. Don’t be afraid to get your hands dirty.