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strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.forceVisible = exports.forceCheck = exports.lazyload = undefined;\n\nvar _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if (\"value\" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();\n\nvar _react = require('react');\n\nvar _react2 = _interopRequireDefault(_react);\n\nvar _propTypes = require('prop-types');\n\nvar _propTypes2 = _interopRequireDefault(_propTypes);\n\nvar _event = require('./utils/event');\n\nvar _scrollParent = require('./utils/scrollParent');\n\nvar _scrollParent2 = _interopRequireDefault(_scrollParent);\n\nvar _debounce = require('./utils/debounce');\n\nvar _debounce2 = _interopRequireDefault(_debounce);\n\nvar _throttle = require('./utils/throttle');\n\nvar _throttle2 = _interopRequireDefault(_throttle);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nfunction _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError(\"Cannot call a class as a function\"); } }\n\nfunction _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError(\"this hasn't been initialised - super() hasn't been called\"); } return call && (typeof call === \"object\" || typeof call === \"function\") ? call : self; }\n\nfunction _inherits(subClass, superClass) { if (typeof superClass !== \"function\" && superClass !== null) { throw new TypeError(\"Super expression must either be null or a function, not \" + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; } /**\n                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                * react-lazyload\n                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                */\n\n\nvar defaultBoundingClientRect = {\n  top: 0,\n  right: 0,\n  bottom: 0,\n  left: 0,\n  width: 0,\n  height: 0\n};\nvar LISTEN_FLAG = 'data-lazyload-listened';\nvar listeners = [];\nvar pending = [];\n\n// try to handle passive events\nvar passiveEventSupported = false;\ntry {\n  var opts = Object.defineProperty({}, 'passive', {\n    get: function get() {\n      passiveEventSupported = true;\n    }\n  });\n  window.addEventListener('test', null, opts);\n} catch (e) {}\n// if they are supported, setup the optional params\n// IMPORTANT: FALSE doubles as the default CAPTURE value!\nvar passiveEvent = passiveEventSupported ? { capture: false, passive: true } : false;\n\n/**\n * Check if `component` is visible in overflow container `parent`\n * @param  {node} component React component\n * @param  {node} parent    component's scroll parent\n * @return {bool}\n */\nvar checkOverflowVisible = function checkOverflowVisible(component, parent) {\n  var node = component.ref;\n\n  var parentTop = void 0;\n  var parentLeft = void 0;\n  var parentHeight = void 0;\n  var parentWidth = void 0;\n\n  try {\n    var _parent$getBoundingCl = parent.getBoundingClientRect();\n\n    parentTop = _parent$getBoundingCl.top;\n    parentLeft = _parent$getBoundingCl.left;\n    parentHeight = _parent$getBoundingCl.height;\n    parentWidth = _parent$getBoundingCl.width;\n  } catch (e) {\n    parentTop = defaultBoundingClientRect.top;\n    parentLeft = defaultBoundingClientRect.left;\n    parentHeight = defaultBoundingClientRect.height;\n    parentWidth = defaultBoundingClientRect.width;\n  }\n\n  var windowInnerHeight = window.innerHeight || document.documentElement.clientHeight;\n  var windowInnerWidth = window.innerWidth || document.documentElement.clientWidth;\n\n  // calculate top and height of the intersection of the element's scrollParent and viewport\n  var intersectionTop = Math.max(parentTop, 0); // intersection's top relative to viewport\n  var intersectionLeft = Math.max(parentLeft, 0); // intersection's left relative to viewport\n  var intersectionHeight = Math.min(windowInnerHeight, parentTop + parentHeight) - intersectionTop; // height\n  var intersectionWidth = Math.min(windowInnerWidth, parentLeft + parentWidth) - intersectionLeft; // width\n\n  // check whether the element is visible in the intersection\n  var top = void 0;\n  var left = void 0;\n  var height = void 0;\n  var width = void 0;\n\n  try {\n    var _node$getBoundingClie = node.getBoundingClientRect();\n\n    top = _node$getBoundingClie.top;\n    left = _node$getBoundingClie.left;\n    height = _node$getBoundingClie.height;\n    width = _node$getBoundingClie.width;\n  } catch (e) {\n    top = defaultBoundingClientRect.top;\n    left = defaultBoundingClientRect.left;\n    height = defaultBoundingClientRect.height;\n    width = defaultBoundingClientRect.width;\n  }\n\n  var offsetTop = top - intersectionTop; // element's top relative to intersection\n  var offsetLeft = left - intersectionLeft; // element's left relative to intersection\n\n  var offsets = Array.isArray(component.props.offset) ? component.props.offset : [component.props.offset, component.props.offset]; // Be compatible with previous API\n\n  return offsetTop - offsets[0] <= intersectionHeight && offsetTop + height + offsets[1] >= 0 && offsetLeft - offsets[0] <= intersectionWidth && offsetLeft + width + offsets[1] >= 0;\n};\n\n/**\n * Check if `component` is visible in document\n * @param  {node} component React component\n * @return {bool}\n */\nvar checkNormalVisible = function checkNormalVisible(component) {\n  var node = component.ref;\n\n  // If this element is hidden by css rules somehow, it's definitely invisible\n  if (!(node.offsetWidth || node.offsetHeight || node.getClientRects().length)) return false;\n\n  var top = void 0;\n  var elementHeight = void 0;\n\n  try {\n    var _node$getBoundingClie2 = node.getBoundingClientRect();\n\n    top = _node$getBoundingClie2.top;\n    elementHeight = _node$getBoundingClie2.height;\n  } catch (e) {\n    top = defaultBoundingClientRect.top;\n    elementHeight = defaultBoundingClientRect.height;\n  }\n\n  var windowInnerHeight = window.innerHeight || document.documentElement.clientHeight;\n\n  var offsets = Array.isArray(component.props.offset) ? component.props.offset : [component.props.offset, component.props.offset]; // Be compatible with previous API\n\n  return top - offsets[0] <= windowInnerHeight && top + elementHeight + offsets[1] >= 0;\n};\n\n/**\n * Detect if element is visible in viewport, if so, set `visible` state to true.\n * If `once` prop is provided true, remove component as listener after checkVisible\n *\n * @param  {React} component   React component that respond to scroll and resize\n */\nvar checkVisible = function checkVisible(component) {\n  var node = component.ref;\n  if (!(node instanceof HTMLElement)) {\n    return;\n  }\n\n  var parent = (0, _scrollParent2.default)(node);\n  var isOverflow = component.props.overflow && parent !== node.ownerDocument && parent !== document && parent !== document.documentElement;\n  var visible = isOverflow ? checkOverflowVisible(component, parent) : checkNormalVisible(component);\n  if (visible) {\n    // Avoid extra render if previously is visible\n    if (!component.visible) {\n      if (component.props.once) {\n        pending.push(component);\n      }\n\n      component.visible = true;\n      component.forceUpdate();\n    }\n  } else if (!(component.props.once && component.visible)) {\n    component.visible = false;\n    if (component.props.unmountIfInvisible) {\n      component.forceUpdate();\n    }\n  }\n};\n\nvar purgePending = function purgePending() {\n  pending.forEach(function (component) {\n    var index = listeners.indexOf(component);\n    if (index !== -1) {\n      listeners.splice(index, 1);\n    }\n  });\n\n  pending = [];\n};\n\nvar lazyLoadHandler = function lazyLoadHandler() {\n  for (var i = 0; i < listeners.length; ++i) {\n    var listener = listeners[i];\n    checkVisible(listener);\n  }\n  // Remove `once` component in listeners\n  purgePending();\n};\n\n/**\n * Forces the component to display regardless of whether the element is visible in the viewport.\n */\nvar forceVisible = function forceVisible() {\n  for (var i = 0; i < listeners.length; ++i) {\n    var listener = listeners[i];\n    listener.visible = true;\n    listener.forceUpdate();\n  }\n  // Remove `once` component in listeners\n  purgePending();\n};\n\n// Depending on component's props\nvar delayType = void 0;\nvar finalLazyLoadHandler = null;\n\nvar isString = function isString(string) {\n  return typeof string === 'string';\n};\n\nvar LazyLoad = function (_Component) {\n  _inherits(LazyLoad, _Component);\n\n  function LazyLoad(props) {\n    _classCallCheck(this, LazyLoad);\n\n    var _this = _possibleConstructorReturn(this, (LazyLoad.__proto__ || Object.getPrototypeOf(LazyLoad)).call(this, props));\n\n    _this.visible = false;\n    _this.setRef = _this.setRef.bind(_this);\n    return _this;\n  }\n\n  _createClass(LazyLoad, [{\n    key: 'componentDidMount',\n    value: function componentDidMount() {\n      // It's unlikely to change delay type on the fly, this is mainly\n      // designed for tests\n      var scrollport = window;\n      var scrollContainer = this.props.scrollContainer;\n\n      if (scrollContainer) {\n        if (isString(scrollContainer)) {\n          scrollport = scrollport.document.querySelector(scrollContainer);\n        }\n      }\n      var needResetFinalLazyLoadHandler = this.props.debounce !== undefined && delayType === 'throttle' || delayType === 'debounce' && this.props.debounce === undefined;\n\n      if (needResetFinalLazyLoadHandler) {\n        (0, _event.off)(scrollport, 'scroll', finalLazyLoadHandler, passiveEvent);\n        (0, _event.off)(window, 'resize', finalLazyLoadHandler, passiveEvent);\n        finalLazyLoadHandler = null;\n      }\n\n      if (!finalLazyLoadHandler) {\n        if (this.props.debounce !== undefined) {\n          finalLazyLoadHandler = (0, _debounce2.default)(lazyLoadHandler, typeof this.props.debounce === 'number' ? this.props.debounce : 300);\n          delayType = 'debounce';\n        } else if (this.props.throttle !== undefined) {\n          finalLazyLoadHandler = (0, _throttle2.default)(lazyLoadHandler, typeof this.props.throttle === 'number' ? this.props.throttle : 300);\n          delayType = 'throttle';\n        } else {\n          finalLazyLoadHandler = lazyLoadHandler;\n        }\n      }\n\n      if (this.props.overflow) {\n        var parent = (0, _scrollParent2.default)(this.ref);\n        if (parent && typeof parent.getAttribute === 'function') {\n          var listenerCount = 1 + +parent.getAttribute(LISTEN_FLAG);\n          if (listenerCount === 1) {\n            parent.addEventListener('scroll', finalLazyLoadHandler, passiveEvent);\n          }\n          parent.setAttribute(LISTEN_FLAG, listenerCount);\n        }\n      } else if (listeners.length === 0 || needResetFinalLazyLoadHandler) {\n        var _props = this.props,\n            scroll = _props.scroll,\n            resize = _props.resize;\n\n\n        if (scroll) {\n          (0, _event.on)(scrollport, 'scroll', finalLazyLoadHandler, passiveEvent);\n        }\n\n        if (resize) {\n          (0, _event.on)(window, 'resize', finalLazyLoadHandler, passiveEvent);\n        }\n      }\n\n      listeners.push(this);\n      checkVisible(this);\n    }\n  }, {\n    key: 'shouldComponentUpdate',\n    value: function shouldComponentUpdate() {\n      return this.visible;\n    }\n  }, {\n    key: 'componentWillUnmount',\n    value: function componentWillUnmount() {\n      if (this.props.overflow) {\n        var parent = (0, _scrollParent2.default)(this.ref);\n        if (parent && typeof parent.getAttribute === 'function') {\n          var listenerCount = +parent.getAttribute(LISTEN_FLAG) - 1;\n          if (listenerCount === 0) {\n            parent.removeEventListener('scroll', finalLazyLoadHandler, passiveEvent);\n            parent.removeAttribute(LISTEN_FLAG);\n          } else {\n            parent.setAttribute(LISTEN_FLAG, listenerCount);\n          }\n        }\n      }\n\n      var index = listeners.indexOf(this);\n      if (index !== -1) {\n        listeners.splice(index, 1);\n      }\n\n      if (listeners.length === 0 && typeof window !== 'undefined') {\n        (0, _event.off)(window, 'resize', finalLazyLoadHandler, passiveEvent);\n        (0, _event.off)(window, 'scroll', finalLazyLoadHandler, passiveEvent);\n      }\n    }\n  }, {\n    key: 'setRef',\n    value: function setRef(element) {\n      if (element) {\n        this.ref = element;\n      }\n    }\n  }, {\n    key: 'render',\n    value: function render() {\n      var _props2 = this.props,\n          height = _props2.height,\n          children = _props2.children,\n          placeholder = _props2.placeholder,\n          className = _props2.className,\n          classNamePrefix = _props2.classNamePrefix,\n          style = _props2.style;\n\n\n      return _react2.default.createElement(\n        'div',\n        { className: classNamePrefix + '-wrapper ' + className, ref: this.setRef, style: style },\n        this.visible ? children : placeholder ? placeholder : _react2.default.createElement('div', {\n          style: { height: height },\n          className: classNamePrefix + '-placeholder'\n        })\n      );\n    }\n  }]);\n\n  return LazyLoad;\n}(_react.Component);\n\nLazyLoad.propTypes = {\n  className: _propTypes2.default.string,\n  classNamePrefix: _propTypes2.default.string,\n  once: _propTypes2.default.bool,\n  height: _propTypes2.default.oneOfType([_propTypes2.default.number, _propTypes2.default.string]),\n  offset: _propTypes2.default.oneOfType([_propTypes2.default.number, _propTypes2.default.arrayOf(_propTypes2.default.number)]),\n  overflow: _propTypes2.default.bool,\n  resize: _propTypes2.default.bool,\n  scroll: _propTypes2.default.bool,\n  children: _propTypes2.default.node,\n  throttle: _propTypes2.default.oneOfType([_propTypes2.default.number, _propTypes2.default.bool]),\n  debounce: _propTypes2.default.oneOfType([_propTypes2.default.number, _propTypes2.default.bool]),\n  placeholder: _propTypes2.default.node,\n  scrollContainer: _propTypes2.default.oneOfType([_propTypes2.default.string, _propTypes2.default.object]),\n  unmountIfInvisible: _propTypes2.default.bool,\n  style: _propTypes2.default.object\n};\n\nLazyLoad.defaultProps = {\n  className: '',\n  classNamePrefix: 'lazyload',\n  once: false,\n  offset: 0,\n  overflow: false,\n  resize: false,\n  scroll: true,\n  unmountIfInvisible: false\n};\n\nvar getDisplayName = function getDisplayName(WrappedComponent) {\n  return WrappedComponent.displayName || WrappedComponent.name || 'Component';\n};\n\nvar decorator = function decorator() {\n  var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};\n  return function lazyload(WrappedComponent) {\n    return function (_Component2) {\n      _inherits(LazyLoadDecorated, _Component2);\n\n      function LazyLoadDecorated() {\n        _classCallCheck(this, LazyLoadDecorated);\n\n        var _this2 = _possibleConstructorReturn(this, (LazyLoadDecorated.__proto__ || Object.getPrototypeOf(LazyLoadDecorated)).call(this));\n\n        _this2.displayName = 'LazyLoad' + getDisplayName(WrappedComponent);\n        return _this2;\n      }\n\n      _createClass(LazyLoadDecorated, [{\n        key: 'render',\n        value: function render() {\n          return _react2.default.createElement(\n            LazyLoad,\n            options,\n            _react2.default.createElement(WrappedComponent, this.props)\n          );\n        }\n      }]);\n\n      return LazyLoadDecorated;\n    }(_react.Component);\n  };\n};\n\nexports.lazyload = decorator;\nexports.default = LazyLoad;\nexports.forceCheck = lazyLoadHandler;\nexports.forceVisible = forceVisible;","\"use strict\";\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = debounce;\nfunction debounce(func, wait, immediate) {\n  var timeout = void 0;\n  var args = void 0;\n  var context = void 0;\n  var timestamp = void 0;\n  var result = void 0;\n\n  var later = function later() {\n    var last = +new Date() - timestamp;\n\n    if (last < wait && last >= 0) {\n      timeout = setTimeout(later, wait - last);\n    } else {\n      timeout = null;\n      if (!immediate) {\n        result = func.apply(context, args);\n        if (!timeout) {\n          context = null;\n          args = null;\n        }\n      }\n    }\n  };\n\n  return function debounced() {\n    context = this;\n    args = arguments;\n    timestamp = +new Date();\n\n    var callNow = immediate && !timeout;\n    if (!timeout) {\n      timeout = setTimeout(later, wait);\n    }\n\n    if (callNow) {\n      result = func.apply(context, args);\n      context = null;\n      args = null;\n    }\n\n    return result;\n  };\n}","\"use strict\";\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.on = on;\nexports.off = off;\nfunction on(el, eventName, callback, opts) {\n  opts = opts || false;\n  if (el.addEventListener) {\n    el.addEventListener(eventName, callback, opts);\n  } else if (el.attachEvent) {\n    el.attachEvent(\"on\" + eventName, function (e) {\n      callback.call(el, e || window.event);\n    });\n  }\n}\n\nfunction off(el, eventName, callback, opts) {\n  opts = opts || false;\n  if (el.removeEventListener) {\n    el.removeEventListener(eventName, callback, opts);\n  } else if (el.detachEvent) {\n    el.detachEvent(\"on\" + eventName, callback);\n  }\n}","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\n\n/**\n * @fileOverview Find scroll parent\n */\n\nexports.default = function (node) {\n  if (!(node instanceof HTMLElement)) {\n    return document.documentElement;\n  }\n\n  var excludeStaticParent = node.style.position === 'absolute';\n  var overflowRegex = /(scroll|auto)/;\n  var parent = node;\n\n  while (parent) {\n    if (!parent.parentNode) {\n      return node.ownerDocument || document.documentElement;\n    }\n\n    var style = window.getComputedStyle(parent);\n    var position = style.position;\n    var overflow = style.overflow;\n    var overflowX = style['overflow-x'];\n    var overflowY = style['overflow-y'];\n\n    if (position === 'static' && excludeStaticParent) {\n      parent = parent.parentNode;\n      continue;\n    }\n\n    if (overflowRegex.test(overflow) && overflowRegex.test(overflowX) && overflowRegex.test(overflowY)) {\n      return parent;\n    }\n\n    parent = parent.parentNode;\n  }\n\n  return node.ownerDocument || node.documentElement || document.documentElement;\n};","\"use strict\";\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = throttle;\n/*eslint-disable */\nfunction throttle(fn, threshhold, scope) {\n  threshhold || (threshhold = 250);\n  var last, deferTimer;\n  return function () {\n    var context = scope || this;\n\n    var now = +new Date(),\n        args = arguments;\n    if (last && now < last + threshhold) {\n      // hold on to it\n      clearTimeout(deferTimer);\n      deferTimer = setTimeout(function () {\n        last = now;\n        fn.apply(context, args);\n      }, threshhold);\n    } else {\n      last = now;\n      fn.apply(context, args);\n    }\n  };\n}"],"names":["exports","undefined","_createClass","defineProperties","target","props","i","length","descriptor","enumerable","configurable","writable","Object","defineProperty","key","Constructor","protoProps","staticProps","prototype","_react","_react2","_interopRequireDefault","_propTypes2","_event","_scrollParent2","_debounce2","_throttle2","obj","__esModule","default","_classCallCheck","instance","TypeError","_possibleConstructorReturn","self","call","ReferenceError","_inherits","subClass","superClass","create","constructor","value","setPrototypeOf","__proto__","defaultBoundingClientRect","LISTEN_FLAG","listeners","pending","passiveEventSupported","opts","get","window","addEventListener","e","passiveEvent","capture","passive","checkVisible","component","node","ref","HTMLElement","parent","visible","overflow","ownerDocument","document","documentElement","parentTop","parentLeft","parentHeight","parentWidth","_parent$getBoundingCl","getBoundingClientRect","top","left","height","width","windowInnerHeight","innerHeight","clientHeight","windowInnerWidth","innerWidth","clientWidth","intersectionTop","Math","max","intersectionLeft","intersectionHeight","min","intersectionWidth","_node$getBoundingClie","offsetTop","offsetLeft","offsets","Array","isArray","offset","checkOverflowVisible","offsetWidth","offsetHeight","getClientRects","elementHeight","_node$getBoundingClie2","checkNormalVisible","once","push","forceUpdate","unmountIfInvisible","purgePending","forEach","index","indexOf","splice","lazyLoadHandler","listener","delayType","finalLazyLoadHandler","LazyLoad","_Component","this","_this","getPrototypeOf","setRef","bind","scrollport","scrollContainer","querySelector","needResetFinalLazyLoadHandler","debounce","off","throttle","getAttribute","listenerCount","setAttribute","_props","scroll","resize","on","removeEventListener","removeAttribute","element","_props2","children","placeholder","className","classNamePrefix","style","createElement","Component","propTypes","string","bool","oneOfType","number","arrayOf","object","defaultProps","getDisplayName","WrappedComponent","displayName","name","func","wait","immediate","timeout","args","context","timestamp","result","later","last","Date","setTimeout","apply","arguments","callNow","el","eventName","callback","attachEvent","event","detachEvent","excludeStaticParent","position","overflowRegex","parentNode","getComputedStyle","overflowX","overflowY","test","fn","threshhold","scope","deferTimer","now","clearTimeout"],"sourceRoot":""}