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<?php

add_action( 'wp_footer', 'my_custom_popup_scripts', 500 );
function my_custom_popup_scripts() { ?>
	<script type="text/javascript">
		(function ($) {

			$('.pum_sub_form').on('pumNewsletterSuccess pumNewsletterErrorAlreadySubscribed', function () {
				var $this = $(this);
				    $popup = $this.parents('.pum');
				
				$popup.trigger('pumSetCookie');
				
				setTimeout(function () {
					$popup.popmake('close');
				}, 3000);
			});


		}(jQuery))
	</script><?php
}