The meta tag "apple-touch-icon-precomposed" is deprecated

[khag7]

The meta tag apple-touch-icon-precomposed is inserted when a site icon is defined.

That tag name is deprecated in favor of apple-touch-icon.

A good example of why this matters is to run a Google Lighthouse report on any website using WordPress. Unless they have corrected this issue themselves, a warning is thrown for using this tag name.

This is a 2 second fix, just remove -precomposed from line 31531 of /wp-includes/general-template.php.

In the meantime, I've been using the following filter on all my sites:

add_filter( 'site_icon_meta_tags', function( $mt ){
	return str_replace ( '-precomposed', '', $mt);
});

[swissspidy]

Here's the documentation about this deprecation:

​https://developer.apple.com/library/archive/documentation/AppleApplications/Reference/SafariWebContent/ConfiguringWebApplications/ConfiguringWebApplications.html

[mukto90]

I've attached a patch

[SergeyBiryukov]

In 46698:

Customize: Remove the deprecated -precomposed suffix from apple-touch-icon link in wp_site_icon().

Props mukto90, khag7.
Fixes #48555.