parallax.js

var parallaxController;
!function() {
    function t() {
        for (var t = 1; t < arguments.length; t++)
            for (var e in arguments[t])
                arguments[t].hasOwnProperty(e) && (arguments[0][e] = arguments[t][e]);
        return arguments[0]
    }
    function e() {
        var t = this
          , e = {
            multiplier: "0.2",
            direction: "up",
            positionType: "absolute"
        };
        paralaxxed.length > 0 && parallaxate(t.paralaxxed, e),
        scrollHandler()
    }
    parallaxController = this;
    var s = !0;
    this.paralaxxed = document.getElementsByClassName("parallaxy-animate"),
    parallaxate = function(e, s) {
        var n = e;
        for (i = 0; i < n.length; i++) {
            var r = JSON.parse(JSON.stringify(s))
              , o = JSON.parse(n[i].getAttribute("data-option"));
            n[i].settings = t(r, o),
            "relative" == o.positionType ? (n[i].initial_offset = parseInt(window.getComputedStyle(n[i], null).getPropertyValue("margin-top"), 10),
            n[i].dataset.positionType = "relative") : (n[i].initial_offset = n[i].offsetTop,
            n[i].dataset.positionType = "absolute"),
            n[i].dataset = o.direction,
            n[i].dataset.currentDelta = 0,
            n[i].dataset.newDelta = 0
        }
    }
    ,
    scrollHandler = function() {
        var t = window.pageYOffset;
        for (i = 0; i < paralaxxed.length; i++) {
            var e = paralaxxed[i].dataset.currentDelta
              , n = 0 - t * paralaxxed[i].settings.multiplier;
            if ("down" == paralaxxed[i].settings.direction && (n = 0 + t * paralaxxed[i].settings.multiplier),
            "down" == paralaxxed[i].settings.direction)
                ;
            else {
                if (ismobile)
                    r = e - (e - n),
                    e && e < 0 && (paralaxxed[i].style.transform = "translateY(" + r + "px)");
                else {
                    var r = e - .08 * (e - n);
                    paralaxxed[i].style.transform = "translateY(" + r + "px) translateZ(0)",
                    paralaxxed[i].style.webkitTransform = "translateY(" + r + "px) translateZ(0)"
                }
                paralaxxed[i].dataset.currentDelta = r
            }
        }
        s && window.requestAnimationFrame(scrollHandler)
    }
    ,
    pauseTween = function() {
        s = !1
    }
    ,
    restartTween = function() {
        s = !0,
        scrollHandler()
    }
    ,
    e()
}();