WordPress at a glance
function is not described

dashboard_browser_nag_class() WP 3.2.0

No Hooks.

Return

Array.

Usage

dashboard_browser_nag_class( $classes );
$classes(array) (required)

Code of dashboard browser nag class: wp-admin/includes/dashboard.php WP 5.2.2

<?php
function dashboard_browser_nag_class( $classes ) {
	$response = wp_check_browser_version();

	if ( $response && $response['insecure'] ) {
		$classes[] = 'browser-insecure';
	}

	return $classes;
}