https://www.nordclass.ru/bitrix/templates/eshop_adapt_wood/script.js?14335026241122

1function eshopOpenNativeMenu()
2{
3	var native_menu = BX("bx_native_menu"),
4		is_menu_active = BX.hasClass(native_menu, "active"),
5		topHeight,
6		easing;
7
8	if (is_menu_active)
9	{
10		BX.removeClass(native_menu, "active");
11		BX.removeClass(BX('bx_menu_bg'), "active");
12		BX("bx_eshop_wrap").style.position = "";
13		BX("bx_eshop_wrap").style.top = "";
14		BX("bx_eshop_wrap").style.overflow = "";
15	}
16	else
17	{
18		BX.addClass(native_menu, "active");
19		BX.addClass(BX('bx_menu_bg'), "active");
20		topHeight = document.body.scrollTop;
21		BX("bx_eshop_wrap").style.position = "fixed";
22		BX("bx_eshop_wrap").style.top = -topHeight+"px";
23		BX("bx_eshop_wrap").style.overflow = "hidden";
24	}
25
26	easing = new BX.easing({
27		duration : 300,
28		start : { left : (is_menu_active ? 0 : -100) },
29		finish : { left : (is_menu_active ? -100 : 0) },
30		transition : BX.easing.transitions.quart,
31		step : function(state){
32			native_menu.style.left = state.left + "%";
33		}
34	});
35	easing.animate();
36}
37
38BX.bind(window, 'resize',
39	function() {
40		if (window.innerWidth >= 640 && BX.hasClass(BX("bx_native_menu"), "active"))
41		{
42			eshopOpenNativeMenu();
43		}
44	}
45);