smooth-scroll.min.js

/*! smooth-scroll v10.2.1 | (c) 2016 Chris Ferdinandi | MIT License | http://github.com/cferdinandi/smooth-scroll */
!(function (e, t) { typeof define === 'function' && define.amd ? define([], t(e)) : typeof exports === 'object' ? module.exports = t(e) : e.smoothScroll = t(e) })(typeof global !== 'undefined' ? global : this.window || this.global, function (e) { 'use strict'; var t, n, o, r, a, c, l, i = {}, u = 'querySelector' in document && 'addEventListener' in e, s = {selector: '[data-scroll]', selectorHeader: null, speed: 500, easing: 'easeInOutCubic', offset: 0, callback: function () {}}, d = function () { var e = {}, t = !1, n = 0, o = arguments.length; Object.prototype.toString.call(arguments[0]) === '[object Boolean]' && (t = arguments[0], n++); for (var r = function (n) { for (var o in n)Object.prototype.hasOwnProperty.call(n, o) && (t && Object.prototype.toString.call(n[o]) === '[object Object]' ? e[o] = d(!0, e[o], n[o]) : e[o] = n[o]) }; n < o; n++) { var a = arguments[n]; r(a) } return e }, f = function (e) { return Math.max(e.scrollHeight, e.offsetHeight, e.clientHeight) }, h = function (e, t) { for (Element.prototype.matches || (Element.prototype.matches = Element.prototype.matchesSelector || Element.prototype.mozMatchesSelector || Element.prototype.msMatchesSelector || Element.prototype.oMatchesSelector || Element.prototype.webkitMatchesSelector || function (e) { for (var t = (this.document || this.ownerDocument).querySelectorAll(e), n = t.length; --n >= 0 && t.item(n) !== this;);return n > -1 }); e && e !== document; e = e.parentNode) if (e.matches(t)) return e; return null }, m = function (e) { e.charAt(0) === '#' && (e = e.substr(1)); for (var t, n = String(e), o = n.length, r = -1, a = '', c = n.charCodeAt(0); ++r < o;) { if (t = n.charCodeAt(r), t === 0) throw new InvalidCharacterError('Invalid character: the input contains U+0000.'); a += t >= 1 && t <= 31 || t == 127 || r === 0 && t >= 48 && t <= 57 || r === 1 && t >= 48 && t <= 57 && c === 45 ? '\\' + t.toString(16) + ' ' : t >= 128 || t === 45 || t === 95 || t >= 48 && t <= 57 || t >= 65 && t <= 90 || t >= 97 && t <= 122 ? n.charAt(r) : '\\' + n.charAt(r) } return '#' + a }, p = function (e, t) { var n; return e === 'easeInQuad' && (n = t * t), e === 'easeOutQuad' && (n = t * (2 - t)), e === 'easeInOutQuad' && (n = t < 0.5 ? 2 * t * t : -1 + (4 - 2 * t) * t), e === 'easeInCubic' && (n = t * t * t), e === 'easeOutCubic' && (n = --t * t * t + 1), e === 'easeInOutCubic' && (n = t < 0.5 ? 4 * t * t * t : (t - 1) * (2 * t - 2) * (2 * t - 2) + 1), e === 'easeInQuart' && (n = t * t * t * t), e === 'easeOutQuart' && (n = 1 - --t * t * t * t), e === 'easeInOutQuart' && (n = t < 0.5 ? 8 * t * t * t * t : 1 - 8 * --t * t * t * t), e === 'easeInQuint' && (n = t * t * t * t * t), e === 'easeOutQuint' && (n = 1 + --t * t * t * t * t), e === 'easeInOutQuint' && (n = t < 0.5 ? 16 * t * t * t * t * t : 1 + 16 * --t * t * t * t * t), n || t }, g = function (e, t, n) { var o = 0; if (e.offsetParent) do o += e.offsetTop, e = e.offsetParent; while (e);return o = Math.max(o - t - n, 0), Math.min(o, v() - b()) }, b = function () { return Math.max(document.documentElement.clientHeight, e.innerHeight || 0) }, v = function () { return Math.max(document.body.scrollHeight, document.documentElement.scrollHeight, document.body.offsetHeight, document.documentElement.offsetHeight, document.body.clientHeight, document.documentElement.clientHeight) }, y = function (e) { return e && typeof JSON === 'object' && typeof JSON.parse === 'function' ? JSON.parse(e) : {} }, O = function (e) { return e ? f(e) + e.offsetTop : 0 }, S = function (t, n, o) { o || (t.focus(), document.activeElement.id !== t.id && (t.setAttribute('tabindex', '-1'), t.focus(), t.style.outline = 'none'), e.scrollTo(0, n)) }; i.animateScroll = function (n, o, c) { var i = y(o ? o.getAttribute('data-options') : null), u = d(t || s, c || {}, i), f = Object.prototype.toString.call(n) === '[object Number]', h = f || !n.tagName ? null : n; if (f || h) { var m = e.pageYOffset; u.selectorHeader && !r && (r = document.querySelector(u.selectorHeader)), a || (a = O(r)); var b, E, I = f ? n : g(h, a, parseInt(u.offset, 10)), H = I - m, A = v(), j = 0, C = function (t, r, a) { var c = e.pageYOffset; (t == r || c == r || e.innerHeight + c >= A) && (clearInterval(a), S(n, r, f), u.callback(n, o)) }, M = function () { j += 16, b = j / parseInt(u.speed, 10), b = b > 1 ? 1 : b, E = m + H * p(u.easing, b), e.scrollTo(0, Math.floor(E)), C(E, I, l) }, w = function () { clearInterval(l), l = setInterval(M, 16) }; e.pageYOffset === 0 && e.scrollTo(0, 0), w() } }; var E = function (t) { var r; try { r = m(decodeURIComponent(e.location.hash)) } catch (t) { r = m(e.location.hash) }n && (n.id = n.getAttribute('data-scroll-id'), i.animateScroll(n, o), n = null, o = null) }, I = function (r) { if (r.button === 0 && !r.metaKey && !r.ctrlKey && (o = h(r.target, t.selector), o && o.tagName.toLowerCase() === 'a' && o.hostname === e.location.hostname && o.pathname === e.location.pathname && /#/.test(o.href))) { var a; try { a = m(decodeURIComponent(o.hash)) } catch (e) { a = m(o.hash) } if (a === '#') { r.preventDefault(), n = document.body; var c = n.id ? n.id : 'smooth-scroll-top'; return n.setAttribute('data-scroll-id', c), n.id = '', void (e.location.hash.substring(1) === c ? E() : e.location.hash = c) }n = document.querySelector(a), n && (n.setAttribute('data-scroll-id', n.id), n.id = '', o.hash === e.location.hash && (r.preventDefault(), E())) } }, H = function (e) { c || (c = setTimeout(function () { c = null, a = O(r) }, 66)) }; return i.destroy = function () { t && (document.removeEventListener('click', I, !1), e.removeEventListener('resize', H, !1), t = null, n = null, o = null, r = null, a = null, c = null, l = null) }, i.init = function (n) { u && (i.destroy(), t = d(s, n || {}), r = t.selectorHeader ? document.querySelector(t.selectorHeader) : null, a = O(r), document.addEventListener('click', I, !1), e.addEventListener('hashchange', E, !1), r && e.addEventListener('resize', H, !1)) }, i })