From c288100d9ea5c09efa14b0d4d32ee87b077b8588 Mon Sep 17 00:00:00 2001
From: gdh1995
Date: Thu, 22 Dec 2016 22:24:28 +0800
Subject: getViewportTopLeft: consider the new style "contain"

If an element's `contain` is/contains `paint`, then it will be forced
showing just as its `position` is `relative`.
---
 lib/dom_utils.coffee | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'lib')

diff --git a/lib/dom_utils.coffee b/lib/dom_utils.coffee
index d39ce1de..7232bb45 100644
--- a/lib/dom_utils.coffee
+++ b/lib/dom_utils.coffee
@@ -290,7 +290,7 @@ DomUtils =
 
   getViewportTopLeft: ->
     style = getComputedStyle document.documentElement
-    if style.position == "static"
+    if style.position == "static" and not /content|paint|strict/.test(style.contain or "")
       zoom = +style.zoom || 1
       top: Math.ceil(window.scrollY / zoom), left: Math.ceil(window.scrollX / zoom)
     else
-- 
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