By https://github.com/rediris, extracted from https://github.com/Prinzhorn/skrollr/issues/596#issuecomment-54241421.

skrollr.js

// DEBOUNCE FUNCTION via @http://davidwalsh.name/javascript-debounce-function
function debounce(a,b,c){var d;return function(){var e=this,f=arguments;clearTimeout(d),d=setTimeout(function(){d=null,c||a.apply(e,f)},b),c&&!d&&a.apply(e,f)}}

skrollrCheck = debounce(function() {
  var winWidth        = window.innerWidth;
  if(winWidth >= 600) {
    // Init Skrollr
    skrollr.init({
        forceHeight: false,//disable setting height on body
        mobileDeceleration:0.05,
        render: function(data) {
            //Debugging - Log the current scroll position.
            //console.log('data.curTop: ' + data.curTop);
        }
    });
    skrollr.get().refresh();
  } else {
    // Destroy skrollr for screens less than 600px
    skrollr.init().destroy();
  }
}, 250);

//Initialize skrollr, but only if it exists
if(typeof skrollr !== typeof undefined){
  // INITIALIZE
  window.onload = skrollrCheck();
  window.addEventListener('resize', skrollrCheck);
} else {
  console.log('skrollr is missing.');
}