Customize: Prevent absent site icon link from outputting an empty string as href in customizer; use /favicon.ico as fallback.

An empty string causes some browsers to use the current URL as the `href`. When using `history.replaceState()` Chrome will re-fetch the favicon with each call, meaning that `customize.php` gets hit with wasted requests which tax the server.

Fixes #38377.


git-svn-id: https://develop.svn.wordpress.org/trunk@38901 602fd350-edb4-49c9-b593-d223f7449a82
This commit is contained in:
Weston Ruter
2016-10-25 04:46:36 +00:00
parent 31156b0bfb
commit e6425b0735
3 changed files with 75 additions and 13 deletions
+20 -6
View File
@@ -2776,12 +2776,26 @@ function wp_site_icon() {
return;
}
$meta_tags = array(
sprintf( '<link rel="icon" href="%s" sizes="32x32" />', esc_url( get_site_icon_url( 32 ) ) ),
sprintf( '<link rel="icon" href="%s" sizes="192x192" />', esc_url( get_site_icon_url( 192 ) ) ),
sprintf( '<link rel="apple-touch-icon-precomposed" href="%s" />', esc_url( get_site_icon_url( 180 ) ) ),
sprintf( '<meta name="msapplication-TileImage" content="%s" />', esc_url( get_site_icon_url( 270 ) ) ),
);
$meta_tags = array();
$icon_32 = get_site_icon_url( 32 );
if ( empty( $icon_32 ) && is_customize_preview() ) {
$icon_32 = '/favicon.ico'; // Serve default favicon URL in customizer so element can be updated for preview.
}
if ( $icon_32 ) {
$meta_tags[] = sprintf( '<link rel="icon" href="%s" sizes="32x32" />', esc_url( $icon_32 ) );
}
$icon_192 = get_site_icon_url( 192 );
if ( $icon_192 ) {
$meta_tags[] = sprintf( '<link rel="icon" href="%s" sizes="192x192" />', esc_url( $icon_192 ) );
}
$icon_180 = get_site_icon_url( 180 );
if ( $icon_180 ) {
$meta_tags[] = sprintf( '<link rel="apple-touch-icon-precomposed" href="%s" />', esc_url( $icon_180 ) );
}
$icon_270 = get_site_icon_url( 270 );
if ( $icon_270 ) {
$meta_tags[] = sprintf( '<meta name="msapplication-TileImage" content="%s" />', esc_url( $icon_270 ) );
}
/**
* Filters the site icon meta tags, so Plugins can add their own.