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Register as an anonymous module unless amdModuleId is set\r\n    define([], function () {\r\n      return (global['lrStickyHeader'] = factory(global));\r\n    });\r\n  } else if (typeof exports === 'object') {\r\n    // Node. Does not work with strict CommonJS, but\r\n    // only CommonJS-like environments that support module.exports,\r\n    // like Node.\r\n    module.exports = factory(global);\r\n  } else {\r\n    global['lrStickyHeader'] = factory(global);\r\n  }\r\n})(window, function factory (window) {\r\n  'use strict';\r\n  function getOffset (element, property) {\r\n    var offset = element[property];\r\n    var parent = element;\r\n    while ((parent = parent.offsetParent) !== null) {\r\n      offset += parent[property];\r\n    }\r\n    return offset;\r\n  }\r\n\r\n  var sticky = {\r\n    //todo some memoize stuff\r\n    setWidth: function setWidth () {\r\n      var firstRow = this.tbody.getElementsByTagName('TR')[0];\r\n      var trh = this.thead.getElementsByTagName('TR')[0];\r\n\r\n      var firstTds;\r\n      var firstThs;\r\n\r\n      function setCellWidth (cell) {\r\n        cell.style.width = cell.offsetWidth + 'px';\r\n      }\r\n\r\n      if (firstRow && trh) {\r\n        firstTds = firstRow.getElementsByTagName('TD');\r\n        firstThs = trh.getElementsByTagName('TH');\r\n        [].forEach.call(firstTds, setCellWidth);\r\n        [].forEach.call(firstThs, setCellWidth);\r\n      }\r\n    },\r\n    eventListener: function eventListener () {\r\n      var offsetTop = getOffset(this.thead, 'offsetTop') - Number(this.headerHeight);\r\n      var offsetLeft = getOffset(this.thead, 'offsetLeft');\r\n      var parentOffsetTop = this.parentIsWindow ? 0 : getOffset(this.parent, 'offsetTop');\r\n      var parentScrollTop = this.parentIsWindow ? parent.scrollY : this.parent.scrollTop;\r\n      var classes = this.thead.className.split(' ');\r\n\r\n      if (this.stick !== true && (offsetTop - (parentOffsetTop + parentScrollTop) < 0) &&\r\n          (offsetTop + this.tbody.offsetHeight - (parentOffsetTop + parentScrollTop) > 0)) {\r\n        this.stick = true;\r\n        this.treshold = offsetTop;\r\n        this.windowScrollY = this.parentIsWindow ? 0 : window.scrollY;\r\n        this.setWidth();\r\n        this.thead.style.left = offsetLeft + 'px';\r\n        this.thead.style.top = Number(this.headerHeight + parentOffsetTop - this.windowScrollY) + 'px';\r\n        setTimeout(function () {\r\n          classes.push('lr-sticky-header');\r\n          this.thead.style.position = 'fixed';\r\n          this.thead.className = classes.join(' ');\r\n          this.element.style.marginTop = Number(this.thead.offsetHeight) + 'px';\r\n        }.bind(this), 0);\r\n      }\r\n\r\n      if (this.stick === true && !this.parentIsWindow && this.windowScrollY !== window.scrollY) {\r\n        this.windowScrollY = window.scrollY;\r\n        this.thead.style.top = Number(this.headerHeight + parentOffsetTop - this.windowScrollY) + 'px';\r\n      }\r\n\r\n      if (this.stick === true && (\r\n                 (this.parentIsWindow && (this.treshold - parentScrollTop > 0)) ||\r\n                 (parentScrollTop <= 0))) {\r\n        this.stick = false;\r\n        this.thead.style.position = 'initial';\r\n        classes.splice(classes.indexOf('lr-sticky-header'), 1);\r\n        this.thead.className = (classes).join(' ');\r\n        this.element.style.marginTop = '0';\r\n      }\r\n    }\r\n  };\r\n\r\n  return function lrStickyHeader (tableElement, options) {\r\n    var headerHeight = 0;\r\n      if (options && options.headerHeight) {\r\n          headerHeight = options.headerHeight;\r\n      }\r\n      var parent = window;\r\n    if (options && options.parent) {\r\n      parent = options.parent;\r\n    }\r\n\r\n    var thead;\r\n    var tbody;\r\n\r\n    if (tableElement.tagName !== 'TABLE') {\r\n      throw new Error('lrStickyHeader only works on table element');\r\n    }\r\n    tbody = tableElement.getElementsByTagName('TBODY');\r\n\r\n    thead = tableElement.getElementsByTagName('THEAD');\r\n    if (!thead.length) {\r\n      throw new Error('could not find the thead group element');\r\n    }\r\n\r\n    if (!tbody.length) {\r\n      throw new Error('could not find the tbody group element');\r\n    }\r\n\r\n    thead = thead[0];\r\n    tbody = tbody[0];\r\n\r\n\r\n    var stickyTable = Object.create(sticky, {\r\n      element: {value: tableElement},\r\n      parent: {\r\n        get: function () {\r\n          return parent;\r\n        }\r\n      },\r\n      parentIsWindow: {value: parent === window},\r\n      headerHeight: {\r\n        get: function () {\r\n          return headerHeight;\r\n        }\r\n      },\r\n      thead: {\r\n        get: function () {\r\n          return thead;\r\n        }\r\n      },\r\n      tbody: {\r\n        get: function () {\r\n          return tbody;\r\n        }\r\n      }\r\n    });\r\n\r\n    var listener = stickyTable.eventListener.bind(stickyTable);\r\n    parent.addEventListener('scroll', listener);\r\n    if (parent !== window) {\r\n      window.addEventListener('scroll', listener);\r\n    }\r\n    stickyTable.clean = function clean () {\r\n      parent.removeEventListener('scroll', listener);\r\n      if (parent !== window) {\r\n        window.removeEventListener('scroll', listener);\r\n      }\r\n    };\r\n\r\n    return stickyTable;\r\n  };\r\n});\r\n\r\n"],"sourceRoot":""}