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//when select variation in single product page
var is_single= <?php echo is_product()? '1':'0'?>;
forms = $( ".variations_form" );
if(is_single)
forms.on("woocommerce_update_variation_values",function(e,dt){
	//this timer is important!
	setTimeout(function(){
		var price=$(".woocommerce-variation-price .price .woocommerce-Price-amount").html();
		console.log("fire variation:",price);
		if(price) $(".price-wrapper .product-page-price").html("<span class=\"woocommerce-Price-amount amount\">"+price+"</span>");
	},200);
});