Filter the secondary button classes.


$attributesArrayHolds the HTML classes
$typeStringButton type
 * Add or filer the secondary button attributes.
 * @param array $attributes Array of HTML classes.
 * @param string $type The secondary button type.
function my_prefix_secondary_btn_classes( $classes, $type ) {
	if ( 'custom_url' === $type ) {
		$classes[] = 'my-custom-class';
		$classes[] = 'another-one';
	return $classes;
add_filter( 'cartpops_secondary_btn_classes', 'my_prefix_secondary_btn_classes', 10, 2 );

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