Permanently cache scrollbar size

simgit1 · Sep 1, 2016 · 5693ced · 5693ced
1 parent 315e9ce
commit 5693ced
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Showing 3 changed files with 15 additions and 5 deletions.
diff --git a/dist/js/tether.js b/dist/js/tether.js
@@ -179,7 +179,11 @@ function getOffsetParent(el) {
   return el.offsetParent || document.documentElement;
 }
 
+var _scrollBarSize = null;
 function getScrollBarSize() {
+  if (_scrollBarSize) {
+    return _scrollBarSize;
+  }
   var inner = document.createElement('div');
   inner.style.width = '100%';
   inner.style.height = '200px';
@@ -212,7 +216,8 @@ function getScrollBarSize() {
 
   var width = widthContained - widthScroll;
 
-  return { width: width, height: width };
+  _scrollBarSize = { width: width, height: width };
+  return _scrollBarSize;
 }
 
 function extend() {