wp-admin/includes/class-wp-upgrader-skin.php:242Outputs JavaScript that calls function to decrement the update counts.
$typestring protected function decrement_update_count( $type ) { if ( ! $this->result || is_wp_error( $this->result ) || 'up_to_date' === $this->result ) { return; } if ( defined( 'IFRAME_REQUEST' ) ) { echo '<script type="text/javascript"> if ( window.postMessage && JSON ) { window.parent.postMessage( JSON.stringify( { action: "decrementUpdateCount", upgradeType: "' . $type . '" } ), window.location.protocol + "//" + window.location.hostname + ( "" !== window.location.port ? ":" + window.location.port : "" ) ); } </script>'; } else { echo '<script type="text/javascript"> (function( wp ) { if ( wp && wp.updates && wp.updates.decrementCount ) { wp.updates.decrementCount( "' . $type . '" ); } })( window.wp ); </script>'; } }Introduced in 3.9.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-admin/includes/class-wp-upgrader-skin.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.