bower_components/foundation-sites/js/foundation.sticky.js
function emCalc(em) {
  return parseInt(window.getComputedStyle(document.body, null).fontSize, 10) * em;
}
function emCalc(em) {
  return parseInt(window.getComputedStyle(document.body, null).fontSize, 10) * em;
}
function emCalc ( em ) { return parseInt ( window . getComputedStyle ( document . body , null ) . fontSize , 10 ) * em ; }
Helper function to calculate em values
@param Number {em} - number of em's to calculate into pixels
Helper function to calculate em values