WordPress at a glance
function is not described

wpview_media_sandbox_styles() WP 4.0.0

Returns the URLs for CSS files used in an iframe-sandbox'd TinyMCE media view.

No Hooks.

Return

Array. The relevant CSS file URLs.

Usage

wpview_media_sandbox_styles();

Code of wpview media sandbox styles: wp-includes/media.php VER 5.1.1

<?php
function wpview_media_sandbox_styles() {
	$version        = 'ver=' . get_bloginfo( 'version' );
	$mediaelement   = includes_url( "js/mediaelement/mediaelementplayer-legacy.min.css?$version" );
	$wpmediaelement = includes_url( "js/mediaelement/wp-mediaelement.css?$version" );

	return array( $mediaelement, $wpmediaelement );
}