WordPress Version: 5.9
/**
* Renders the Custom CSS style element.
*
* @since 4.7.0
*/
function wp_custom_css_cb()
{
$styles = wp_get_custom_css();
if ($styles || is_customize_preview()) {
$type_attr = current_theme_supports('html5', 'style') ? '' : ' type="text/css"';
?>
<style<?php
echo $type_attr;
?> id="wp-custom-css">
<?php
// Note that esc_html() cannot be used because `div > span` is not interpreted properly.
echo strip_tags($styles);
?>
</style>
<?php
}
}