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strict';\n\nvar _typeof = typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; };\n\n/*\r\n * smoothscroll polyfill - v0.3.5\r\n * https://iamdustan.github.io/smoothscroll\r\n * 2016 (c) Dustan Kasten, Jeremias Menichelli - MIT License\r\n */\n\n(function (w, d, undefined) {\n\t'use strict';\n\n\t/*\r\n  * aliases\r\n  * w: window global object\r\n  * d: document\r\n  * undefined: undefined\r\n  */\n\n\t// polyfill\n\n\tfunction polyfill() {\n\t\t// return when scrollBehavior interface is supported\n\t\tif ('scrollBehavior' in d.documentElement.style) {\n\t\t\treturn;\n\t\t}\n\n\t\t/*\r\n   * globals\r\n   */\n\t\tvar Element = w.HTMLElement || w.Element;\n\t\tvar SCROLL_TIME = 468;\n\n\t\t/*\r\n   * object gathering original scroll methods\r\n   */\n\t\tvar original = {\n\t\t\tscroll: w.scroll || w.scrollTo,\n\t\t\tscrollBy: w.scrollBy,\n\t\t\telScroll: Element.prototype.scroll || scrollElement,\n\t\t\tscrollIntoView: Element.prototype.scrollIntoView\n\t\t};\n\n\t\t/*\r\n   * define timing method\r\n   */\n\t\tvar now = w.performance && w.performance.now ? w.performance.now.bind(w.performance) : Date.now;\n\n\t\t/**\r\n   * changes scroll position inside an element\r\n   * @method scrollElement\r\n   * @param {Number} x\r\n   * @param {Number} y\r\n   */\n\t\tfunction scrollElement(x, y) {\n\t\t\tthis.scrollLeft = x;\n\t\t\tthis.scrollTop = y;\n\t\t}\n\n\t\t/**\r\n   * returns result of applying ease math function to a number\r\n   * @method ease\r\n   * @param {Number} k\r\n   * @returns {Number}\r\n   */\n\t\tfunction ease(k) {\n\t\t\treturn 0.5 * (1 - Math.cos(Math.PI * k));\n\t\t}\n\n\t\t/**\r\n   * indicates if a smooth behavior should be applied\r\n   * @method shouldBailOut\r\n   * @param {Number|Object} x\r\n   * @returns {Boolean}\r\n   */\n\t\tfunction shouldBailOut(x) {\n\t\t\tif ((typeof x === 'undefined' ? 'undefined' : _typeof(x)) !== 'object' || x === null || x.behavior === undefined || x.behavior === 'auto' || x.behavior === 'instant') {\n\t\t\t\t// first arg not an object/null\n\t\t\t\t// or behavior is auto, instant or undefined\n\t\t\t\treturn true;\n\t\t\t}\n\n\t\t\tif ((typeof x === 'undefined' ? 'undefined' : _typeof(x)) === 'object' && x.behavior === 'smooth') {\n\t\t\t\t// first argument is an object and behavior is smooth\n\t\t\t\treturn false;\n\t\t\t}\n\n\t\t\t// throw error when behavior is not supported\n\t\t\tthrow new TypeError('behavior not valid');\n\t\t}\n\n\t\t/**\r\n   * finds scrollable parent of an element\r\n   * @method findScrollableParent\r\n   * @param {Node} el\r\n   * @returns {Node} el\r\n   */\n\t\tfunction findScrollableParent(el) {\n\t\t\tvar isBody;\n\t\t\tvar hasScrollableSpace;\n\t\t\tvar hasVisibleOverflow;\n\n\t\t\tdo {\n\t\t\t\tel = el.parentNode;\n\n\t\t\t\t// set condition variables\n\t\t\t\tisBody = el === d.body;\n\t\t\t\thasScrollableSpace = el.clientHeight < el.scrollHeight || el.clientWidth < el.scrollWidth;\n\t\t\t\thasVisibleOverflow = w.getComputedStyle(el, null).overflow === 'visible';\n\t\t\t} while (!isBody && !(hasScrollableSpace && !hasVisibleOverflow));\n\n\t\t\tisBody = hasScrollableSpace = hasVisibleOverflow = null;\n\n\t\t\treturn el;\n\t\t}\n\n\t\t/**\r\n   * self invoked function that, given a context, steps through scrolling\r\n   * @method step\r\n   * @param {Object} context\r\n   */\n\t\tfunction step(context) {\n\t\t\tvar time = now();\n\t\t\tvar value;\n\t\t\tvar currentX;\n\t\t\tvar currentY;\n\t\t\tvar elapsed = (time - context.startTime) / SCROLL_TIME;\n\n\t\t\t// avoid elapsed times higher than one\n\t\t\telapsed = elapsed > 1 ? 1 : elapsed;\n\n\t\t\t// apply easing to elapsed time\n\t\t\tvalue = ease(elapsed);\n\n\t\t\tcurrentX = context.startX + (context.x - context.startX) * value;\n\t\t\tcurrentY = context.startY + (context.y - context.startY) * value;\n\n\t\t\tcontext.method.call(context.scrollable, currentX, currentY);\n\n\t\t\t// scroll more if we have not reached our destination\n\t\t\tif (currentX !== context.x || currentY !== context.y) {\n\t\t\t\tw.requestAnimationFrame(step.bind(w, context));\n\t\t\t}\n\t\t}\n\n\t\t/**\r\n   * scrolls window with a smooth behavior\r\n   * @method smoothScroll\r\n   * @param {Object|Node} el\r\n   * @param {Number} x\r\n   * @param {Number} y\r\n   */\n\t\tfunction smoothScroll(el, x, y) {\n\t\t\tvar scrollable;\n\t\t\tvar startX;\n\t\t\tvar startY;\n\t\t\tvar method;\n\t\t\tvar startTime = now();\n\n\t\t\t// define scroll context\n\t\t\tif (el === d.body) {\n\t\t\t\tscrollable = w;\n\t\t\t\tstartX = w.scrollX || w.pageXOffset;\n\t\t\t\tstartY = w.scrollY || w.pageYOffset;\n\t\t\t\tmethod = original.scroll;\n\t\t\t} else {\n\t\t\t\tscrollable = el;\n\t\t\t\tstartX = el.scrollLeft;\n\t\t\t\tstartY = el.scrollTop;\n\t\t\t\tmethod = scrollElement;\n\t\t\t}\n\n\t\t\t// scroll looping over a frame\n\t\t\tstep({\n\t\t\t\tscrollable: scrollable,\n\t\t\t\tmethod: method,\n\t\t\t\tstartTime: startTime,\n\t\t\t\tstartX: startX,\n\t\t\t\tstartY: startY,\n\t\t\t\tx: x,\n\t\t\t\ty: y\n\t\t\t});\n\t\t}\n\n\t\t/*\r\n   * ORIGINAL METHODS OVERRIDES\r\n   */\n\n\t\t// w.scroll and w.scrollTo\n\t\tw.scroll = w.scrollTo = function () {\n\t\t\t// avoid smooth behavior if not required\n\t\t\tif (shouldBailOut(arguments[0])) {\n\t\t\t\toriginal.scroll.call(w, arguments[0].left || arguments[0], arguments[0].top || arguments[1]);\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\t// LET THE SMOOTHNESS BEGIN!\n\t\t\tsmoothScroll.call(w, d.body, ~~arguments[0].left, ~~arguments[0].top);\n\t\t};\n\n\t\t// w.scrollBy\n\t\tw.scrollBy = function () {\n\t\t\t// avoid smooth behavior if not required\n\t\t\tif (shouldBailOut(arguments[0])) {\n\t\t\t\toriginal.scrollBy.call(w, arguments[0].left || arguments[0], arguments[0].top || arguments[1]);\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\t// LET THE SMOOTHNESS BEGIN!\n\t\t\tsmoothScroll.call(w, d.body, ~~arguments[0].left + (w.scrollX || w.pageXOffset), ~~arguments[0].top + (w.scrollY || w.pageYOffset));\n\t\t};\n\n\t\t// Element.prototype.scroll and Element.prototype.scrollTo\n\t\tElement.prototype.scroll = Element.prototype.scrollTo = function () {\n\t\t\t// avoid smooth behavior if not required\n\t\t\tif (shouldBailOut(arguments[0])) {\n\t\t\t\toriginal.elScroll.call(this, arguments[0].left || arguments[0], arguments[0].top || arguments[1]);\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tvar left = arguments[0].left;\n\t\t\tvar top = arguments[0].top;\n\n\t\t\t// LET THE SMOOTHNESS BEGIN!\n\t\t\tsmoothScroll.call(this, this, typeof left === 'number' ? left : this.scrollLeft, typeof top === 'number' ? top : this.scrollTop);\n\t\t};\n\n\t\t// Element.prototype.scrollBy\n\t\tElement.prototype.scrollBy = function () {\n\t\t\tvar arg0 = arguments[0];\n\n\t\t\tif ((typeof arg0 === 'undefined' ? 'undefined' : _typeof(arg0)) === 'object') {\n\t\t\t\tthis.scroll({\n\t\t\t\t\tleft: arg0.left + this.scrollLeft,\n\t\t\t\t\ttop: arg0.top + this.scrollTop,\n\t\t\t\t\tbehavior: arg0.behavior\n\t\t\t\t});\n\t\t\t} else {\n\t\t\t\tthis.scroll(this.scrollLeft + arg0, this.scrollTop + arguments[1]);\n\t\t\t}\n\t\t};\n\n\t\t// Element.prototype.scrollIntoView\n\t\tElement.prototype.scrollIntoView = function () {\n\t\t\t// avoid smooth behavior if not required\n\t\t\tif (shouldBailOut(arguments[0])) {\n\t\t\t\toriginal.scrollIntoView.call(this, arguments[0] === undefined ? true : arguments[0]);\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\t// LET THE SMOOTHNESS BEGIN!\n\t\t\tvar scrollableParent = findScrollableParent(this);\n\t\t\tvar parentRects = scrollableParent.getBoundingClientRect();\n\t\t\tvar clientRects = this.getBoundingClientRect();\n\n\t\t\tif (scrollableParent !== d.body) {\n\t\t\t\t// reveal element inside parent\n\t\t\t\tsmoothScroll.call(this, scrollableParent, scrollableParent.scrollLeft + clientRects.left - parentRects.left, scrollableParent.scrollTop + clientRects.top - parentRects.top);\n\t\t\t\t// reveal parent in viewport\n\t\t\t\tw.scrollBy({\n\t\t\t\t\tleft: parentRects.left,\n\t\t\t\t\ttop: parentRects.top,\n\t\t\t\t\tbehavior: 'smooth'\n\t\t\t\t});\n\t\t\t} else {\n\t\t\t\t// reveal element in viewport\n\t\t\t\tw.scrollBy({\n\t\t\t\t\tleft: clientRects.left,\n\t\t\t\t\ttop: clientRects.top,\n\t\t\t\t\tbehavior: 'smooth'\n\t\t\t\t});\n\t\t\t}\n\t\t};\n\t}\n\n\tif ((typeof exports === 'undefined' ? 'undefined' : _typeof(exports)) === 'object') {\n\t\t// commonjs\n\t\tmodule.exports = { polyfill: polyfill };\n\t} else {\n\t\t// global\n\t\tpolyfill();\n\t}\n})(window, document);"]}