WordPress Version: 3.7
/**
* Check whether a CSS stylesheet has been added to the queue.
*
* @global WP_Styles $wp_styles The WP_Styles object for printing styles.
*
* @since 2.8.0
*
* @param string $handle Name of the stylesheet.
* @param string $list Optional. Status of the stylesheet to check. Default 'enqueued'.
* Accepts 'enqueued', 'registered', 'queue', 'to_do', and 'done'.
* @return bool Whether style is queued.
*/
function wp_style_is($handle, $list = 'enqueued')
{
global $wp_styles;
if (!is_a($wp_styles, 'WP_Styles')) {
if (!did_action('init')) {
_doing_it_wrong(__FUNCTION__, sprintf(__('Scripts and styles should not be registered or enqueued until the %1$s, %2$s, or %3$s hooks.'), '<code>wp_enqueue_scripts</code>', '<code>admin_enqueue_scripts</code>', '<code>login_enqueue_scripts</code>'), '3.3');
}
$wp_styles = new WP_Styles();
}
return (bool) $wp_styles->query($handle, $list);
}