Snippet to resolve update cart on quantity change in Avada theme in WooCommerce

snippet.php

function add_woo_discount_rules_custom_script(){
	?>

	<script>

		function click_update_cart_btn(upd_cart_btn) {
			var upd_cart_btn = jQuery(".fusion-update-cart");
		 	upd_cart_btn.trigger("click");
		}

		jQuery(document).ready(function($) {
		var update_cart;

		jQuery("body").delegate(".cart_item .qty").on("load", function(){

			if(update_cart != null){
				clearTimeout(update_cart);
			}
			update_cart = setTimeout(click_update_cart_btn, 1000);
		});
		});
	</script>
<?php
}		
add_action('woocommerce_after_cart_table', 'add_woo_discount_rules_custom_script');