jquery.smooth-scroll.min.js

!(function (t) {
  "function" == typeof define && define.amd
    ? define(["jquery"], t)
    : t(
        "object" == typeof module && module.exports ? require("jquery") : jQuery
      );
})(function (m) {
  function e(t) {
    var e = [],
      l = t.dir && "left" === t.dir ? "scrollLeft" : "scrollTop";
    return (
      this.each(function () {
        var t = m(this);
        if (this !== document && this !== window) {
          if (
            document.scrollingElement &&
            (this === document.documentElement || this === document.body)
          )
            return e.push(document.scrollingElement), !1;
          0 < t[l]()
            ? e.push(this)
            : (t[l](1), 0 < t[l]() && e.push(this), t[l](0));
        }
      }),
      e.length ||
        this.each(function () {
          this === document.documentElement &&
            "smooth" === m(this).css("scrollBehavior") &&
            (e = [this]),
            e.length || "BODY" !== this.nodeName || (e = [this]);
        }),
      "first" === t.el && 1 < e.length && (e = [e[0]]),
      e
    );
  }
  var h = {},
    o = /^([\-\+]=)(\d+)/;
  m.fn.extend({
    scrollable: function (t) {
      t = e.call(this, { dir: t });
      return this.pushStack(t);
    },
    firstScrollable: function (t) {
      t = e.call(this, { el: "first", dir: t });
      return this.pushStack(t);
    },
    smoothScroll: function (t, l) {
      if ("options" === (t = t || {}))
        return l
          ? this.each(function () {
              var t = m(this),
                e = m.extend(t.data("ssOpts") || {}, l);
              t.data("ssOpts", e);
            })
          : this.first().data("ssOpts");
      function e(t) {
        function e(t) {
          return t.replace(/(:|\.|\/)/g, "\\$1");
        }
        var l = m(this),
          o = m.extend({}, d, l.data("ssOpts") || {}),
          n = d.exclude,
          s = o.excludeWithin,
          r = 0,
          i = 0,
          c = !0,
          a = {},
          f = m.smoothScroll.filterPath(location.pathname),
          h = m.smoothScroll.filterPath(this.pathname),
          u = location.hostname === this.hostname || !this.hostname,
          h = o.scrollTarget || h === f;
        if (
          ((f = e(this.hash)) && !m(f).length && (c = !1),
          o.scrollTarget || (u && h && f))
        ) {
          for (; c && r < n.length; ) l.is(e(n[r++])) && (c = !1);
          for (; c && i < s.length; ) l.closest(s[i++]).length && (c = !1);
        } else c = !1;
        c &&
          (o.preventDefault && t.preventDefault(),
          m.extend(a, o, { scrollTarget: o.scrollTarget || f, link: this }),
          m.smoothScroll(a));
      }
      var d = m.extend({}, m.fn.smoothScroll.defaults, t);
      return (
        null !== t.delegateSelector
          ? this.off("click.smoothscroll", t.delegateSelector).on(
              "click.smoothscroll",
              t.delegateSelector,
              e
            )
          : this.off("click.smoothscroll").on("click.smoothscroll", e),
        this
      );
    },
  });
  function u(t) {
    var e = { relative: "" },
      l = "string" == typeof t && o.exec(t);
    return (
      "number" == typeof t
        ? (e.px = t)
        : l && ((e.relative = l[1]), (e.px = parseFloat(l[2]) || 0)),
      e
    );
  }
  function d(t) {
    var e = m(t.scrollTarget);
    t.autoFocus &&
      e.length &&
      (e[0].focus(),
      e.is(document.activeElement) || (e.prop({ tabIndex: -1 }), e[0].focus())),
      t.afterScroll.call(t.link, t);
  }
  (m.smoothScroll = function (t, e) {
    if ("options" === t && "object" == typeof e) return m.extend(h, e);
    var l,
      o,
      n,
      s = u(t),
      r = 0,
      i = "offset",
      c = "scrollTop",
      a = {},
      f = {};
    s.px
      ? (l = m.extend({ link: null }, m.fn.smoothScroll.defaults, h))
      : ((l = m.extend({ link: null }, m.fn.smoothScroll.defaults, t || {}, h))
          .scrollElement &&
          ((i = "position"),
          "static" === l.scrollElement.css("position") &&
            l.scrollElement.css("position", "relative")),
        e && (s = u(e))),
      (c = "left" === l.direction ? "scrollLeft" : c),
      l.scrollElement
        ? ((o = l.scrollElement),
          !s.px && /^(?:HTML|BODY)$/.test(o[0].nodeName) && (r = o[c]()))
        : (o = m("html, body").firstScrollable(l.direction)),
      l.beforeScroll.call(o, l),
      (n = s.px
        ? s
        : {
            relative: "",
            px:
              (m(l.scrollTarget)[i]() && m(l.scrollTarget)[i]()[l.direction]) ||
              0,
          }),
      (a[c] = n.relative + (n.px + r + l.offset)),
      "auto" === (r = l.speed) &&
        (r = Math.abs(a[c] - o[c]()) / l.autoCoefficient),
      (f = {
        duration: r,
        easing: l.easing,
        complete: function () {
          d(l);
        },
      }),
      l.step && (f.step = l.step),
      o.length ? o.stop().animate(a, f) : d(l);
  }),
    (m.smoothScroll.version = "2.2.0"),
    (m.smoothScroll.filterPath = function (t) {
      return (t = t || "")
        .replace(/^\//, "")
        .replace(/(?:index|default).[a-zA-Z]{3,4}$/, "")
        .replace(/\/$/, "");
    }),
    (m.fn.smoothScroll.defaults = {
      exclude: [],
      excludeWithin: [],
      offset: 0,
      direction: "top",
      delegateSelector: null,
      scrollElement: null,
      scrollTarget: null,
      autoFocus: !1,
      beforeScroll: function () {},
      afterScroll: function () {},
      easing: "swing",
      speed: 400,
      autoCoefficient: 2,
      preventDefault: !0,
    });
});