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!(function (e) {
  (e.fn.appear = function (a, r) {
    var p = e.extend({ data: void 0, one: !0, accX: 0, accY: 0 }, r);
    return this.each(function () {
      var r = e(this);
      if (((r.appeared = !1), a)) {
        var n = e(window),
          t = function () {
            if (r.is(":visible")) {
              var e = n.scrollLeft(),
                a = n.scrollTop(),
                t = r.offset(),
                c = t.left,
                i = t.top,
                o = p.accX,
                f = p.accY,
                s = r.height(),
                l = n.height(),
                h = r.width(),
                d = n.width();
              i + s + f >= a &&
              i <= a + l + f &&
              c + h + o >= e &&
              c <= e + d + o
                ? r.appeared || r.trigger("appear", p.data)
                : (r.appeared = !1);
            } else r.appeared = !1;
          },
          c = function () {
            if (((r.appeared = !0), p.one)) {
              n.unbind("scroll", t);
              var c = e.inArray(t, e.fn.appear.checks);
              c >= 0 && e.fn.appear.checks.splice(c, 1);
            }
            a.apply(this, arguments);
          };
        p.one ? r.one("appear", p.data, c) : r.bind("appear", p.data, c),
          n.scroll(t),
          e.fn.appear.checks.push(t),
          t();
      } else r.trigger("appear", p.data);
    });
  }),
    e.extend(e.fn.appear, {
      checks: [],
      timeout: null,
      checkAll: function () {
        var a = e.fn.appear.checks.length;
        if (a > 0) for (; a--; ) e.fn.appear.checks[a]();
      },
      run: function () {
        e.fn.appear.timeout && clearTimeout(e.fn.appear.timeout),
          (e.fn.appear.timeout = setTimeout(e.fn.appear.checkAll, 20));
      },
    }),
    e.each(
      [
        "append",
        "prepend",
        "after",
        "before",
        "attr",
        "removeAttr",
        "addClass",
        "removeClass",
        "toggleClass",
        "remove",
        "css",
        "show",
        "hide",
      ],
      function (a, r) {
        var p = e.fn[r];
        p &&
          (e.fn[r] = function () {
            var a = p.apply(this, arguments);
            return e.fn.appear.run(), a;
          });
      }
    );
})(jQuery);