Merge pull request #8717 from gehasia/sticky-fluidheightoffset-fix

[Bugfix] Sticky : Set container height before positioning anchors

Author: kball

js/foundation.sticky.js

@@ -47,6 +47,10 @@ class Sticky {
     this.scrollCount = this.options.checkEvery;
     this.isStuck = false;
     $(window).one('load.zf.sticky', function(){
+      //We calculate the container height to have correct values for anchor points offset calculation.
+      _this.containerHeight = _this.$element.css("display") == "none" ? 0 : _this.$element[0].getBoundingClientRect().height;
+      _this.$container.css('height', _this.containerHeight);
+      _this.elemHeight = _this.containerHeight;
       if(_this.options.anchor !== ''){
         _this.$anchor = $('#' + _this.options.anchor);
       }else{