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* Helper function for iterating over a collection\n *\n * @param collection\n * @param fn\n */\nfunction each(collection, fn) {\n    var i      = 0,\n        length = collection.length,\n        cont;\n\n    for(i; i < length; i++) {\n        cont = fn(collection[i], i);\n        if(cont === false) {\n            break; //allow early exit\n        }\n    }\n}\n\n/**\n * Helper function for determining whether target object is an array\n *\n * @param target the object under test\n * @return {Boolean} true if array, false otherwise\n */\nfunction isArray(target) {\n    return Object.prototype.toString.apply(target) === '[object Array]';\n}\n\n/**\n * Helper function for determining whether target object is a function\n *\n * @param target the object under test\n * @return {Boolean} true if function, false otherwise\n */\nfunction isFunction(target) {\n    return typeof target === 'function';\n}\n\nmodule.exports = {\n    isFunction : isFunction,\n    isArray : isArray,\n    each : each\n};\n","'use strict';\n\n/**\n * Determine if a DOM element matches a CSS selector\n *\n * @param {Element} elem\n * @param {String} selector\n * @return {Boolean}\n * @api public\n */\n\nfunction matches(elem, selector) {\n  // Vendor-specific implementations of `Element.prototype.matches()`.\n  var proto = window.Element.prototype;\n  var nativeMatches = proto.matches ||\n      proto.mozMatchesSelector ||\n      proto.msMatchesSelector ||\n      proto.oMatchesSelector ||\n      proto.webkitMatchesSelector;\n\n  if (!elem || elem.nodeType !== 1) {\n    return false;\n  }\n\n  var parentElem = elem.parentNode;\n\n  // use native 'matches'\n  if (nativeMatches) {\n    return nativeMatches.call(elem, selector);\n  }\n\n  // native support for `matches` is missing and a fallback is required\n  var nodes = parentElem.querySelectorAll(selector);\n  var len = nodes.length;\n\n  for (var i = 0; i < len; i++) {\n    if (nodes[i] === elem) {\n      return true;\n    }\n  }\n\n  return false;\n}\n\n/**\n * Expose `matches`\n */\n\nmodule.exports = matches;\n","/**\n * Module dependencies\n */\n\nvar matches = require('dom-matches');\n\n/**\n * @param element {Element}\n * @param selector {String}\n * @param context {Element}\n * @return {Element}\n */\nmodule.exports = function (element, selector, context) {\n  context = context || document;\n  // guard against orphans\n  element = { parentNode: element };\n\n  while ((element = element.parentNode) && element !== context) {\n    if (matches(element, selector)) {\n      return element;\n    }\n  }\n};\n","'use strict'\r\n\r\nmodule.exports = isMobile\r\nmodule.exports.isMobile = isMobile\r\nmodule.exports.default = isMobile\r\n\r\nvar mobileRE = /(android|bb\\d+|meego).+mobile|avantgo|bada\\/|blackberry|blazer|compal|elaine|fennec|hiptop|iemobile|ip(hone|od)|iris|kindle|lge |maemo|midp|mmp|mobile.+firefox|netfront|opera m(ob|in)i|palm( os)?|phone|p(ixi|re)\\/|plucker|pocket|psp|series[46]0|symbian|treo|up\\.(browser|link)|vodafone|wap|windows (ce|phone)|xda|xiino/i\r\n\r\nvar tabletRE = /(android|bb\\d+|meego).+mobile|avantgo|bada\\/|blackberry|blazer|compal|elaine|fennec|hiptop|iemobile|ip(hone|od)|iris|kindle|lge |maemo|midp|mmp|mobile.+firefox|netfront|opera m(ob|in)i|palm( os)?|phone|p(ixi|re)\\/|plucker|pocket|psp|series[46]0|symbian|treo|up\\.(browser|link)|vodafone|wap|windows (ce|phone)|xda|xiino|android|ipad|playbook|silk/i\r\n\r\nfunction isMobile (opts) {\r\n  if (!opts) opts = {}\r\n  var ua = opts.ua\r\n  if (!ua && typeof navigator !== 'undefined') ua = navigator.userAgent\r\n  if (ua && ua.headers && typeof ua.headers['user-agent'] === 'string') {\r\n    ua = ua.headers['user-agent']\r\n  }\r\n  if (typeof ua !== 'string') return false\r\n\r\n  var result = opts.tablet ? tabletRE.test(ua) : mobileRE.test(ua)\r\n\r\n  if (\r\n    !result &&\r\n    opts.tablet &&\r\n    opts.featureDetect &&\r\n    navigator &&\r\n    navigator.maxTouchPoints > 1 &&\r\n    ua.indexOf('Macintosh') !== -1 &&\r\n    ua.indexOf('Safari') !== -1\r\n  ) {\r\n    result = true\r\n  }\r\n\r\n  return result\r\n}\r\n","var MediaQueryDispatch = require('./MediaQueryDispatch');\nmodule.exports = new MediaQueryDispatch();\n","/**\n * Delegate to handle a media query being matched and unmatched.\n *\n * @param {object} options\n * @param {function} options.match callback for when the media query is matched\n * @param {function} [options.unmatch] callback for when the media query is unmatched\n * @param {function} [options.setup] one-time callback triggered the first time a query is matched\n * @param {boolean} [options.deferSetup=false] should the setup callback be run immediately, rather than first time query is matched?\n * @constructor\n */\nfunction QueryHandler(options) {\n    this.options = options;\n    !options.deferSetup && this.setup();\n}\n\nQueryHandler.prototype = {\n\n    constructor : QueryHandler,\n\n    /**\n     * coordinates setup of the handler\n     *\n     * @function\n     */\n    setup : function() {\n        if(this.options.setup) {\n            this.options.setup();\n        }\n        this.initialised = true;\n    },\n\n    /**\n     * coordinates setup and triggering of the handler\n     *\n     * @function\n     */\n    on : function() {\n        !this.initialised && this.setup();\n        this.options.match && this.options.match();\n    },\n\n    /**\n     * coordinates the unmatch event for the handler\n     *\n     * @function\n     */\n    off : function() {\n        this.options.unmatch && this.options.unmatch();\n    },\n\n    /**\n     * called when a handler is to be destroyed.\n     * delegates to the destroy or unmatch callbacks, depending on availability.\n     *\n     * @function\n     */\n    destroy : function() {\n        this.options.destroy ? this.options.destroy() : this.off();\n    },\n\n    /**\n     * determines equality by reference.\n     * if object is supplied compare options, if function, compare match callback\n     *\n     * @function\n     * @param {object || function} [target] the target for comparison\n     */\n    equals : function(target) {\n        return this.options === target || this.options.match === target;\n    }\n\n};\n\nmodule.exports = QueryHandler;\n","var QueryHandler = require('./QueryHandler');\nvar each = require('./Util').each;\n\n/**\n * Represents a single media query, manages it's state and registered handlers for this query\n *\n * @constructor\n * @param {string} query the media query string\n * @param {boolean} [isUnconditional=false] whether the media query should run regardless of whether the conditions are met. Primarily for helping older browsers deal with mobile-first design\n */\nfunction MediaQuery(query, isUnconditional) {\n    this.query = query;\n    this.isUnconditional = isUnconditional;\n    this.handlers = [];\n    this.mql = window.matchMedia(query);\n\n    var self = this;\n    this.listener = function(mql) {\n        // Chrome passes an MediaQueryListEvent object, while other browsers pass MediaQueryList directly\n        self.mql = mql.currentTarget || mql;\n        self.assess();\n    };\n    this.mql.addListener(this.listener);\n}\n\nMediaQuery.prototype = {\n\n    constuctor : MediaQuery,\n\n    /**\n     * add a handler for this query, triggering if already active\n     *\n     * @param {object} handler\n     * @param {function} handler.match callback for when query is activated\n     * @param {function} [handler.unmatch] callback for when query is deactivated\n     * @param {function} [handler.setup] callback for immediate execution when a query handler is registered\n     * @param {boolean} [handler.deferSetup=false] should the setup callback be deferred until the first time the handler is matched?\n     */\n    addHandler : function(handler) {\n        var qh = new QueryHandler(handler);\n        this.handlers.push(qh);\n\n        this.matches() && qh.on();\n    },\n\n    /**\n     * removes the given handler from the collection, and calls it's destroy methods\n     *\n     * @param {object || function} handler the handler to remove\n     */\n    removeHandler : function(handler) {\n        var handlers = this.handlers;\n        each(handlers, function(h, i) {\n            if(h.equals(handler)) {\n                h.destroy();\n                return !handlers.splice(i,1); //remove from array and exit each early\n            }\n        });\n    },\n\n    /**\n     * Determine whether the media query should be considered a match\n     *\n     * @return {Boolean} true if media query can be considered a match, false otherwise\n     */\n    matches : function() {\n        return this.mql.matches || this.isUnconditional;\n    },\n\n    /**\n     * Clears all handlers and unbinds events\n     */\n    clear : function() {\n        each(this.handlers, function(handler) {\n            handler.destroy();\n        });\n        this.mql.removeListener(this.listener);\n        this.handlers.length = 0; //clear array\n    },\n\n    /*\n        * Assesses the query, turning on all handlers if it matches, turning them off if it doesn't match\n        */\n    assess : function() {\n        var action = this.matches() ? 'on' : 'off';\n\n        each(this.handlers, function(handler) {\n            handler[action]();\n        });\n    }\n};\n\nmodule.exports = MediaQuery;\n","var MediaQuery = require('./MediaQuery');\nvar Util = require('./Util');\nvar each = Util.each;\nvar isFunction = Util.isFunction;\nvar isArray = Util.isArray;\n\n/**\n * Allows for registration of query handlers.\n * Manages the query handler's state and is responsible for wiring up browser events\n *\n * @constructor\n */\nfunction MediaQueryDispatch () {\n    if(!window.matchMedia) {\n        throw new Error('matchMedia not present, legacy browsers require a polyfill');\n    }\n\n    this.queries = {};\n    this.browserIsIncapable = !window.matchMedia('only all').matches;\n}\n\nMediaQueryDispatch.prototype = {\n\n    constructor : MediaQueryDispatch,\n\n    /**\n     * Registers a handler for the given media query\n     *\n     * @param {string} q the media query\n     * @param {object || Array || Function} options either a single query handler object, a function, or an array of query handlers\n     * @param {function} options.match fired when query matched\n     * @param {function} [options.unmatch] fired when a query is no longer matched\n     * @param {function} [options.setup] fired when handler first triggered\n     * @param {boolean} [options.deferSetup=false] whether setup should be run immediately or deferred until query is first matched\n     * @param {boolean} [shouldDegrade=false] whether this particular media query should always run on incapable browsers\n     */\n    register : function(q, options, shouldDegrade) {\n        var queries         = this.queries,\n            isUnconditional = shouldDegrade && this.browserIsIncapable;\n\n        if(!queries[q]) {\n            queries[q] = new MediaQuery(q, isUnconditional);\n        }\n\n        //normalise to object in an array\n        if(isFunction(options)) {\n            options = { match : options };\n        }\n        if(!isArray(options)) {\n            options = [options];\n        }\n        each(options, function(handler) {\n            if (isFunction(handler)) {\n                handler = { match : handler };\n            }\n            queries[q].addHandler(handler);\n        });\n\n        return this;\n    },\n\n    /**\n     * unregisters a query and all it's handlers, or a specific handler for a query\n     *\n     * @param {string} q the media query to target\n     * @param {object || function} [handler] specific handler to unregister\n     */\n    unregister : function(q, handler) {\n        var query = this.queries[q];\n\n        if(query) {\n            if(handler) {\n                query.removeHandler(handler);\n            }\n            else {\n                query.clear();\n                delete this.queries[q];\n            }\n        }\n\n        return this;\n    }\n};\n\nmodule.exports = MediaQueryDispatch;\n","function _typeof(obj) {\n  if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") {\n    _typeof = function (obj) {\n      return typeof obj;\n    };\n  } else {\n    _typeof = function (obj) {\n      return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj;\n    };\n  }\n\n  return _typeof(obj);\n}\n\nfunction _defineProperty(obj, key, value) {\n  if (key in obj) {\n    Object.defineProperty(obj, key, {\n      value: value,\n      enumerable: true,\n      configurable: true,\n      writable: true\n    });\n  } else {\n    obj[key] = value;\n  }\n\n  return obj;\n}\n\nfunction ownKeys(object, enumerableOnly) {\n  var keys = Object.keys(object);\n\n  if (Object.getOwnPropertySymbols) {\n    var symbols = Object.getOwnPropertySymbols(object);\n    if (enumerableOnly) symbols = symbols.filter(function (sym) {\n      return Object.getOwnPropertyDescriptor(object, sym).enumerable;\n    });\n    keys.push.apply(keys, symbols);\n  }\n\n  return keys;\n}\n\nfunction _objectSpread2(target) {\n  for (var i = 1; i < arguments.length; i++) {\n    var source = arguments[i] != null ? arguments[i] : {};\n\n    if (i % 2) {\n      ownKeys(source, true).forEach(function (key) {\n        _defineProperty(target, key, source[key]);\n      });\n    } else if (Object.getOwnPropertyDescriptors) {\n      Object.defineProperties(target, Object.getOwnPropertyDescriptors(source));\n    } else {\n      ownKeys(source).forEach(function (key) {\n        Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key));\n      });\n    }\n  }\n\n  return target;\n}\n\nvar RE_NUM = /[\\-+]?(?:\\d*\\.|)\\d+(?:[eE][\\-+]?\\d+|)/.source;\n\nfunction getClientPosition(elem) {\n  var box;\n  var x;\n  var y;\n  var doc = elem.ownerDocument;\n  var body = doc.body;\n  var docElem = doc && doc.documentElement; // 根据 GBS 最新数据，A-Grade Browsers 都已支持 getBoundingClientRect 方法，不用再考虑传统的实现方式\n\n  box = elem.getBoundingClientRect(); // 注：jQuery 还考虑减去 docElem.clientLeft/clientTop\n  // 但测试发现，这样反而会导致当 html 和 body 有边距/边框样式时，获取的值不正确\n  // 此外，ie6 会忽略 html 的 margin 值，幸运地是没有谁会去设置 html 的 margin\n\n  x = box.left;\n  y = box.top; // In IE, most of the time, 2 extra pixels are added to the top and left\n  // due to the implicit 2-pixel inset border.  In IE6/7 quirks mode and\n  // IE6 standards mode, this border can be overridden by setting the\n  // document element's border to zero -- thus, we cannot rely on the\n  // offset always being 2 pixels.\n  // In quirks mode, the offset can be determined by querying the body's\n  // clientLeft/clientTop, but in standards mode, it is found by querying\n  // the document element's clientLeft/clientTop.  Since we already called\n  // getClientBoundingRect we have already forced a reflow, so it is not\n  // too expensive just to query them all.\n  // ie 下应该减去窗口的边框吧，毕竟默认 absolute 都是相对窗口定位的\n  // 窗口边框标准是设 documentElement ,quirks 时设置 body\n  // 最好禁止在 body 和 html 上边框 ，但 ie < 9 html 默认有 2px ，减去\n  // 但是非 ie 不可能设置窗口边框，body html 也不是窗口 ,ie 可以通过 html,body 设置\n  // 标准 ie 下 docElem.clientTop 就是 border-top\n  // ie7 html 即窗口边框改变不了。永远为 2\n  // 但标准 firefox/chrome/ie9 下 docElem.clientTop 是窗口边框，即使设了 border-top 也为 0\n\n  x -= docElem.clientLeft || body.clientLeft || 0;\n  y -= docElem.clientTop || body.clientTop || 0;\n  return {\n    left: x,\n    top: y\n  };\n}\n\nfunction getScroll(w, top) {\n  var ret = w[\"page\".concat(top ? 'Y' : 'X', \"Offset\")];\n  var method = \"scroll\".concat(top ? 'Top' : 'Left');\n\n  if (typeof ret !== 'number') {\n    var d = w.document; // ie6,7,8 standard mode\n\n    ret = d.documentElement[method];\n\n    if (typeof ret !== 'number') {\n      // quirks mode\n      ret = d.body[method];\n    }\n  }\n\n  return ret;\n}\n\nfunction getScrollLeft(w) {\n  return getScroll(w);\n}\n\nfunction getScrollTop(w) {\n  return getScroll(w, true);\n}\n\nfunction getOffset(el) {\n  var pos = getClientPosition(el);\n  var doc = el.ownerDocument;\n  var w = doc.defaultView || doc.parentWindow;\n  pos.left += getScrollLeft(w);\n  pos.top += getScrollTop(w);\n  return pos;\n}\n\nfunction _getComputedStyle(elem, name, computedStyle_) {\n  var val = '';\n  var d = elem.ownerDocument;\n  var computedStyle = computedStyle_ || d.defaultView.getComputedStyle(elem, null); // https://github.com/kissyteam/kissy/issues/61\n\n  if (computedStyle) {\n    val = computedStyle.getPropertyValue(name) || computedStyle[name];\n  }\n\n  return val;\n}\n\nvar _RE_NUM_NO_PX = new RegExp(\"^(\".concat(RE_NUM, \")(?!px)[a-z%]+$\"), 'i');\n\nvar RE_POS = /^(top|right|bottom|left)$/;\nvar CURRENT_STYLE = 'currentStyle';\nvar RUNTIME_STYLE = 'runtimeStyle';\nvar LEFT = 'left';\nvar PX = 'px';\n\nfunction _getComputedStyleIE(elem, name) {\n  // currentStyle maybe null\n  // http://msdn.microsoft.com/en-us/library/ms535231.aspx\n  var ret = elem[CURRENT_STYLE] && elem[CURRENT_STYLE][name]; // 当 width/height 设置为百分比时，通过 pixelLeft 方式转换的 width/height 值\n  // 一开始就处理了! CUSTOM_STYLE.height,CUSTOM_STYLE.width ,cssHook 解决@2011-08-19\n  // 在 ie 下不对，需要直接用 offset 方式\n  // borderWidth 等值也有问题，但考虑到 borderWidth 设为百分比的概率很小，这里就不考虑了\n  // From the awesome hack by Dean Edwards\n  // http://erik.eae.net/archives/2007/07/27/18.54.15/#comment-102291\n  // If we're not dealing with a regular pixel number\n  // but a number that has a weird ending, we need to convert it to pixels\n  // exclude left right for relativity\n\n  if (_RE_NUM_NO_PX.test(ret) && !RE_POS.test(name)) {\n    // Remember the original values\n    var style = elem.style;\n    var left = style[LEFT];\n    var rsLeft = elem[RUNTIME_STYLE][LEFT]; // prevent flashing of content\n\n    elem[RUNTIME_STYLE][LEFT] = elem[CURRENT_STYLE][LEFT]; // Put in the new values to get a computed value out\n\n    style[LEFT] = name === 'fontSize' ? '1em' : ret || 0;\n    ret = style.pixelLeft + PX; // Revert the changed values\n\n    style[LEFT] = left;\n    elem[RUNTIME_STYLE][LEFT] = rsLeft;\n  }\n\n  return ret === '' ? 'auto' : ret;\n}\n\nvar getComputedStyleX;\n\nif (typeof window !== 'undefined') {\n  getComputedStyleX = window.getComputedStyle ? _getComputedStyle : _getComputedStyleIE;\n}\n\nfunction each(arr, fn) {\n  for (var i = 0; i < arr.length; i++) {\n    fn(arr[i]);\n  }\n}\n\nfunction isBorderBoxFn(elem) {\n  return getComputedStyleX(elem, 'boxSizing') === 'border-box';\n}\n\nvar BOX_MODELS = ['margin', 'border', 'padding'];\nvar CONTENT_INDEX = -1;\nvar PADDING_INDEX = 2;\nvar BORDER_INDEX = 1;\nvar MARGIN_INDEX = 0;\n\nfunction swap(elem, options, callback) {\n  var old = {};\n  var style = elem.style;\n  var name; // Remember the old values, and insert the new ones\n\n  for (name in options) {\n    if (options.hasOwnProperty(name)) {\n      old[name] = style[name];\n      style[name] = options[name];\n    }\n  }\n\n  callback.call(elem); // Revert the old values\n\n  for (name in options) {\n    if (options.hasOwnProperty(name)) {\n      style[name] = old[name];\n    }\n  }\n}\n\nfunction getPBMWidth(elem, props, which) {\n  var value = 0;\n  var prop;\n  var j;\n  var i;\n\n  for (j = 0; j < props.length; j++) {\n    prop = props[j];\n\n    if (prop) {\n      for (i = 0; i < which.length; i++) {\n        var cssProp = void 0;\n\n        if (prop === 'border') {\n          cssProp = \"\".concat(prop + which[i], \"Width\");\n        } else {\n          cssProp = prop + which[i];\n        }\n\n        value += parseFloat(getComputedStyleX(elem, cssProp)) || 0;\n      }\n    }\n  }\n\n  return value;\n}\n/**\n * A crude way of determining if an object is a window\n * @member util\n */\n\n\nfunction isWindow(obj) {\n  // must use == for ie8\n\n  /* eslint eqeqeq:0 */\n  return obj != null && obj == obj.window;\n}\n\nvar domUtils = {};\neach(['Width', 'Height'], function (name) {\n  domUtils[\"doc\".concat(name)] = function (refWin) {\n    var d = refWin.document;\n    return Math.max( // firefox chrome documentElement.scrollHeight< body.scrollHeight\n    // ie standard mode : documentElement.scrollHeight> body.scrollHeight\n    d.documentElement[\"scroll\".concat(name)], // quirks : documentElement.scrollHeight 最大等于可视窗口多一点？\n    d.body[\"scroll\".concat(name)], domUtils[\"viewport\".concat(name)](d));\n  };\n\n  domUtils[\"viewport\".concat(name)] = function (win) {\n    // pc browser includes scrollbar in window.innerWidth\n    var prop = \"client\".concat(name);\n    var doc = win.document;\n    var body = doc.body;\n    var documentElement = doc.documentElement;\n    var documentElementProp = documentElement[prop]; // 标准模式取 documentElement\n    // backcompat 取 body\n\n    return doc.compatMode === 'CSS1Compat' && documentElementProp || body && body[prop] || documentElementProp;\n  };\n});\n/*\n 得到元素的大小信息\n @param elem\n @param name\n @param {String} [extra]  'padding' : (css width) + padding\n 'border' : (css width) + padding + border\n 'margin' : (css width) + padding + border + margin\n */\n\nfunction getWH(elem, name, extra) {\n  if (isWindow(elem)) {\n    return name === 'width' ? domUtils.viewportWidth(elem) : domUtils.viewportHeight(elem);\n  } else if (elem.nodeType === 9) {\n    return name === 'width' ? domUtils.docWidth(elem) : domUtils.docHeight(elem);\n  }\n\n  var which = name === 'width' ? ['Left', 'Right'] : ['Top', 'Bottom'];\n  var borderBoxValue = name === 'width' ? elem.offsetWidth : elem.offsetHeight;\n  var computedStyle = getComputedStyleX(elem);\n  var isBorderBox = isBorderBoxFn(elem);\n  var cssBoxValue = 0;\n\n  if (borderBoxValue == null || borderBoxValue <= 0) {\n    borderBoxValue = undefined; // Fall back to computed then un computed css if necessary\n\n    cssBoxValue = getComputedStyleX(elem, name);\n\n    if (cssBoxValue == null || Number(cssBoxValue) < 0) {\n      cssBoxValue = elem.style[name] || 0;\n    } // Normalize '', auto, and prepare for extra\n\n\n    cssBoxValue = parseFloat(cssBoxValue) || 0;\n  }\n\n  if (extra === undefined) {\n    extra = isBorderBox ? BORDER_INDEX : CONTENT_INDEX;\n  }\n\n  var borderBoxValueOrIsBorderBox = borderBoxValue !== undefined || isBorderBox;\n  var val = borderBoxValue || cssBoxValue;\n\n  if (extra === CONTENT_INDEX) {\n    if (borderBoxValueOrIsBorderBox) {\n      return val - getPBMWidth(elem, ['border', 'padding'], which);\n    }\n\n    return cssBoxValue;\n  }\n\n  if (borderBoxValueOrIsBorderBox) {\n    var padding = extra === PADDING_INDEX ? -getPBMWidth(elem, ['border'], which) : getPBMWidth(elem, ['margin'], which);\n    return val + (extra === BORDER_INDEX ? 0 : padding);\n  }\n\n  return cssBoxValue + getPBMWidth(elem, BOX_MODELS.slice(extra), which);\n}\n\nvar cssShow = {\n  position: 'absolute',\n  visibility: 'hidden',\n  display: 'block'\n}; // fix #119 : https://github.com/kissyteam/kissy/issues/119\n\nfunction getWHIgnoreDisplay(elem) {\n  var val;\n  var args = arguments; // in case elem is window\n  // elem.offsetWidth === undefined\n\n  if (elem.offsetWidth !== 0) {\n    val = getWH.apply(undefined, args);\n  } else {\n    swap(elem, cssShow, function () {\n      val = getWH.apply(undefined, args);\n    });\n  }\n\n  return val;\n}\n\nfunction css(el, name, v) {\n  var value = v;\n\n  if (_typeof(name) === 'object') {\n    for (var i in name) {\n      if (name.hasOwnProperty(i)) {\n        css(el, i, name[i]);\n      }\n    }\n\n    return undefined;\n  }\n\n  if (typeof value !== 'undefined') {\n    if (typeof value === 'number') {\n      value += 'px';\n    }\n\n    el.style[name] = value;\n    return undefined;\n  }\n\n  return getComputedStyleX(el, name);\n}\n\neach(['width', 'height'], function (name) {\n  var first = name.charAt(0).toUpperCase() + name.slice(1);\n\n  domUtils[\"outer\".concat(first)] = function (el, includeMargin) {\n    return el && getWHIgnoreDisplay(el, name, includeMargin ? MARGIN_INDEX : BORDER_INDEX);\n  };\n\n  var which = name === 'width' ? ['Left', 'Right'] : ['Top', 'Bottom'];\n\n  domUtils[name] = function (elem, val) {\n    if (val !== undefined) {\n      if (elem) {\n        var computedStyle = getComputedStyleX(elem);\n        var isBorderBox = isBorderBoxFn(elem);\n\n        if (isBorderBox) {\n          val += getPBMWidth(elem, ['padding', 'border'], which);\n        }\n\n        return css(elem, name, val);\n      }\n\n      return undefined;\n    }\n\n    return elem && getWHIgnoreDisplay(elem, name, CONTENT_INDEX);\n  };\n}); // 设置 elem 相对 elem.ownerDocument 的坐标\n\nfunction setOffset(elem, offset) {\n  // set position first, in-case top/left are set even on static elem\n  if (css(elem, 'position') === 'static') {\n    elem.style.position = 'relative';\n  }\n\n  var old = getOffset(elem);\n  var ret = {};\n  var current;\n  var key;\n\n  for (key in offset) {\n    if (offset.hasOwnProperty(key)) {\n      current = parseFloat(css(elem, key)) || 0;\n      ret[key] = current + offset[key] - old[key];\n    }\n  }\n\n  css(elem, ret);\n}\n\nvar util = _objectSpread2({\n  getWindow: function getWindow(node) {\n    var doc = node.ownerDocument || node;\n    return doc.defaultView || doc.parentWindow;\n  },\n  offset: function offset(el, value) {\n    if (typeof value !== 'undefined') {\n      setOffset(el, value);\n    } else {\n      return getOffset(el);\n    }\n  },\n  isWindow: isWindow,\n  each: each,\n  css: css,\n  clone: function clone(obj) {\n    var ret = {};\n\n    for (var i in obj) {\n      if (obj.hasOwnProperty(i)) {\n        ret[i] = obj[i];\n      }\n    }\n\n    var overflow = obj.overflow;\n\n    if (overflow) {\n      for (var _i in obj) {\n        if (obj.hasOwnProperty(_i)) {\n          ret.overflow[_i] = obj.overflow[_i];\n        }\n      }\n    }\n\n    return ret;\n  },\n  scrollLeft: function scrollLeft(w, v) {\n    if (isWindow(w)) {\n      if (v === undefined) {\n        return getScrollLeft(w);\n      }\n\n      window.scrollTo(v, getScrollTop(w));\n    } else {\n      if (v === undefined) {\n        return w.scrollLeft;\n      }\n\n      w.scrollLeft = v;\n    }\n  },\n  scrollTop: function scrollTop(w, v) {\n    if (isWindow(w)) {\n      if (v === undefined) {\n        return getScrollTop(w);\n      }\n\n      window.scrollTo(getScrollLeft(w), v);\n    } else {\n      if (v === undefined) {\n        return w.scrollTop;\n      }\n\n      w.scrollTop = v;\n    }\n  },\n  viewportWidth: 0,\n  viewportHeight: 0\n}, domUtils);\n\nfunction scrollIntoView(elem, container, config) {\n  config = config || {}; // document 归一化到 window\n\n  if (container.nodeType === 9) {\n    container = util.getWindow(container);\n  }\n\n  var allowHorizontalScroll = config.allowHorizontalScroll;\n  var onlyScrollIfNeeded = config.onlyScrollIfNeeded;\n  var alignWithTop = config.alignWithTop;\n  var alignWithLeft = config.alignWithLeft;\n  var offsetTop = config.offsetTop || 0;\n  var offsetLeft = config.offsetLeft || 0;\n  var offsetBottom = config.offsetBottom || 0;\n  var offsetRight = config.offsetRight || 0;\n  allowHorizontalScroll = allowHorizontalScroll === undefined ? true : allowHorizontalScroll;\n  var isWin = util.isWindow(container);\n  var elemOffset = util.offset(elem);\n  var eh = util.outerHeight(elem);\n  var ew = util.outerWidth(elem);\n  var containerOffset;\n  var ch;\n  var cw;\n  var containerScroll;\n  var diffTop;\n  var diffBottom;\n  var win;\n  var winScroll;\n  var ww;\n  var wh;\n\n  if (isWin) {\n    win = container;\n    wh = util.height(win);\n    ww = util.width(win);\n    winScroll = {\n      left: util.scrollLeft(win),\n      top: util.scrollTop(win)\n    }; // elem 相对 container 可视视窗的距离\n\n    diffTop = {\n      left: elemOffset.left - winScroll.left - offsetLeft,\n      top: elemOffset.top - winScroll.top - offsetTop\n    };\n    diffBottom = {\n      left: elemOffset.left + ew - (winScroll.left + ww) + offsetRight,\n      top: elemOffset.top + eh - (winScroll.top + wh) + offsetBottom\n    };\n    containerScroll = winScroll;\n  } else {\n    containerOffset = util.offset(container);\n    ch = container.clientHeight;\n    cw = container.clientWidth;\n    containerScroll = {\n      left: container.scrollLeft,\n      top: container.scrollTop\n    }; // elem 相对 container 可视视窗的距离\n    // 注意边框, offset 是边框到根节点\n\n    diffTop = {\n      left: elemOffset.left - (containerOffset.left + (parseFloat(util.css(container, 'borderLeftWidth')) || 0)) - offsetLeft,\n      top: elemOffset.top - (containerOffset.top + (parseFloat(util.css(container, 'borderTopWidth')) || 0)) - offsetTop\n    };\n    diffBottom = {\n      left: elemOffset.left + ew - (containerOffset.left + cw + (parseFloat(util.css(container, 'borderRightWidth')) || 0)) + offsetRight,\n      top: elemOffset.top + eh - (containerOffset.top + ch + (parseFloat(util.css(container, 'borderBottomWidth')) || 0)) + offsetBottom\n    };\n  }\n\n  if (diffTop.top < 0 || diffBottom.top > 0) {\n    // 强制向上\n    if (alignWithTop === true) {\n      util.scrollTop(container, containerScroll.top + diffTop.top);\n    } else if (alignWithTop === false) {\n      util.scrollTop(container, containerScroll.top + diffBottom.top);\n    } else {\n      // 自动调整\n      if (diffTop.top < 0) {\n        util.scrollTop(container, containerScroll.top + diffTop.top);\n      } else {\n        util.scrollTop(container, containerScroll.top + diffBottom.top);\n      }\n    }\n  } else {\n    if (!onlyScrollIfNeeded) {\n      alignWithTop = alignWithTop === undefined ? true : !!alignWithTop;\n\n      if (alignWithTop) {\n        util.scrollTop(container, containerScroll.top + diffTop.top);\n      } else {\n        util.scrollTop(container, containerScroll.top + diffBottom.top);\n      }\n    }\n  }\n\n  if (allowHorizontalScroll) {\n    if (diffTop.left < 0 || diffBottom.left > 0) {\n      // 强制向上\n      if (alignWithLeft === true) {\n        util.scrollLeft(container, containerScroll.left + diffTop.left);\n      } else if (alignWithLeft === false) {\n        util.scrollLeft(container, containerScroll.left + diffBottom.left);\n      } else {\n        // 自动调整\n        if (diffTop.left < 0) {\n          util.scrollLeft(container, containerScroll.left + diffTop.left);\n        } else {\n          util.scrollLeft(container, containerScroll.left + diffBottom.left);\n        }\n      }\n    } else {\n      if (!onlyScrollIfNeeded) {\n        alignWithLeft = alignWithLeft === undefined ? true : !!alignWithLeft;\n\n        if (alignWithLeft) {\n          util.scrollLeft(container, containerScroll.left + diffTop.left);\n        } else {\n          util.scrollLeft(container, containerScroll.left + diffBottom.left);\n        }\n      }\n    }\n  }\n}\n\nexport default scrollIntoView;\n//# sourceMappingURL=index.js.map\n"],"sourceRoot":""}