From 3017e67f3a4868bacddcadb2dbbd5c7de97846b7 Mon Sep 17 00:00:00 2001
From: Pavel Djundik <xPaw@users.noreply.github.com>
Date: Wed, 21 Dec 2016 19:58:36 +0200
Subject: [PATCH] Calculate menu width on touch start

Fixes #831
---
 client/js/libs/slideout.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/client/js/libs/slideout.js b/client/js/libs/slideout.js
index 330c89b3..32b5c640 100644
--- a/client/js/libs/slideout.js
+++ b/client/js/libs/slideout.js
@@ -5,7 +5,7 @@ function slideoutMenu(viewport, menu) {
 	var touchStartPos = null;
 	var touchCurPos = null;
 	var touchStartTime = 0;
-	var menuWidth = parseFloat(window.getComputedStyle(menu).width);
+	var menuWidth = 0;
 	var menuIsOpen = false;
 	var menuIsMoving = false;
 
@@ -27,6 +27,8 @@ function slideoutMenu(viewport, menu) {
 		var touch = e.touches.item(0);
 		viewport.classList.toggle("menu-dragging", true);
 
+		menuWidth = parseFloat(window.getComputedStyle(menu).width);
+
 		if ((!menuIsOpen && touch.screenX < 50) || (menuIsOpen && touch.screenX > menuWidth)) {
 			touchStartPos = touch;
 			touchCurPos = touch;