diff --git a/CHANGELOG.md b/CHANGELOG.md
index f222f87..a4591e8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,11 @@
 
 ## Version History
 
+1.3.0
+
+* Automatic collection of elements with data-onscreenness attribute
+* Output esm and umd script files
+
 1.2.4
 
 * Integration tests with Puppeteer.
@@ -49,4 +54,3 @@ With support of Babel and Rollup it was possible to assemble it to a NPM-module.
 ## toDo, toWant
 * Callbacks
 * Refine the DOM observer
-* automatically collect elements with data-onscreenness attribute
\ No newline at end of file
diff --git a/dist/index.esm.js b/dist/index.esm.js
new file mode 100644
index 0000000..4d02129
--- /dev/null
+++ b/dist/index.esm.js
@@ -0,0 +1,2 @@
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diff --git a/dist/index.esm.js.map b/dist/index.esm.js.map
new file mode 100644
index 0000000..ed4ea76
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\ No newline at end of file
diff --git a/dist/index.js b/dist/index.js
index 40fa892..036781b 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -1,2 +1,2 @@
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+++ b/dist/index.js.map
@@ -1 +1 @@
-{"version":3,"file":"index.js","sources":["../node_modules/core-js/internals/global.js","../node_modules/core-js/internals/internal-state.js","../node_modules/core-js/internals/fails.js","../node_modules/core-js/internals/descriptors.js","../node_modules/core-js/internals/object-property-is-enumerable.js","../node_modules/core-js/internals/create-property-descriptor.js","../node_modules/core-js/internals/classof-raw.js","../node_modules/core-js/internals/indexed-object.js","../node_modules/core-js/internals/require-object-coercible.js","../node_modules/core-js/internals/to-indexed-object.js","../node_modules/core-js/internals/is-object.js","../node_modules/core-js/internals/to-primitive.js","../node_modules/core-js/internals/has.js","../node_modules/core-js/internals/document-create-element.js","../node_modules/core-js/internals/ie8-dom-define.js","../node_modules/core-js/internals/object-get-own-property-descriptor.js","../node_modules/core-js/internals/an-object.js","../node_modules/core-js/internals/object-define-property.js","../node_modules/core-js/internals/hide.js","../node_modules/core-js/internals/set-global.js","../node_modules/core-js/internals/shared.js","../node_modules/core-js/internals/function-to-string.js","../node_modules/core-js/internals/native-weak-map.js","../node_modules/core-js/internals/uid.js","../node_modules/core-js/internals/shared-key.js","../node_modules/core-js/internals/hidden-keys.js","../node_modules/core-js/internals/redefine.js","../node_modules/core-js/internals/to-integer.js","../node_modules/core-js/internals/to-length.js","../node_modules/core-js/internals/to-absolute-index.js","../node_modules/core-js/internals/array-includes.js","../node_modules/core-js/internals/object-keys-internal.js","../node_modules/core-js/internals/enum-bug-keys.js","../node_modules/core-js/internals/object-get-own-property-names.js","../node_modules/core-js/internals/object-get-own-property-symbols.js","../node_modules/core-js/internals/own-keys.js","../node_modules/core-js/internals/copy-constructor-properties.js","../node_modules/core-js/internals/is-forced.js","../node_modules/core-js/internals/export.js","../node_modules/core-js/internals/a-function.js","../node_modules/core-js/internals/to-object.js","../node_modules/core-js/internals/is-array.js","../node_modules/core-js/internals/native-symbol.js","../node_modules/core-js/internals/well-known-symbol.js","../node_modules/core-js/internals/array-species-create.js","../node_modules/core-js/internals/array-methods.js","../node_modules/core-js/internals/bind-context.js","../node_modules/core-js/internals/array-method-has-species-support.js","../node_modules/core-js/modules/es.array.filter.js","../node_modules/core-js/internals/sloppy-array-method.js","../node_modules/core-js/internals/array-for-each.js","../node_modules/core-js/modules/es.array.for-each.js","../node_modules/core-js/internals/object-keys.js","../node_modules/core-js/internals/object-define-properties.js","../node_modules/core-js/internals/html.js","../node_modules/core-js/internals/object-create.js","../node_modules/core-js/internals/add-to-unscopables.js","../node_modules/core-js/modules/es.array.includes.js","../node_modules/core-js/modules/es.array.index-of.js","../node_modules/core-js/modules/es.array.join.js","../node_modules/core-js/internals/create-property.js","../node_modules/core-js/modules/es.array.splice.js","../node_modules/core-js/internals/is-regexp.js","../node_modules/core-js/internals/correct-is-regexp-logic.js","../node_modules/core-js/modules/es.string.includes.js","../node_modules/core-js/internals/validate-string-method-arguments.js","../node_modules/core-js/modules/web.dom-collections.for-each.js","../node_modules/core-js/internals/dom-iterables.js","../node_modules/core-js/modules/es.array.map.js","../node_modules/core-js/internals/validate-set-prototype-of-arguments.js","../node_modules/core-js/internals/object-set-prototype-of.js","../node_modules/core-js/internals/whitespaces.js","../node_modules/core-js/internals/string-trim.js","../node_modules/core-js/modules/es.number.constructor.js","../node_modules/core-js/internals/inherit-if-required.js","../node_modules/core-js/internals/regexp-flags.js","../node_modules/core-js/internals/regexp-exec.js","../node_modules/core-js/modules/es.regexp.exec.js","../node_modules/core-js/internals/fix-regexp-well-known-symbol-logic.js","../node_modules/core-js/internals/advance-string-index.js","../node_modules/core-js/internals/string-at.js","../node_modules/core-js/internals/regexp-exec-abstract.js","../node_modules/core-js/modules/es.string.replace.js","../node_modules/core-js/internals/species-constructor.js","../node_modules/core-js/modules/es.string.split.js","../node_modules/core-js/internals/forced-string-trim-method.js","../node_modules/core-js/modules/es.string.trim.js","../src/utilities.js","../src/onScreenness.js"],"sourcesContent":["var O = 'object';\nvar check = function (it) {\n  return it && it.Math == Math && it;\n};\n\n// https://github.com/zloirock/core-js/issues/86#issuecomment-115759028\nmodule.exports =\n  // eslint-disable-next-line no-undef\n  check(typeof globalThis == O && globalThis) ||\n  check(typeof window == O && window) ||\n  check(typeof self == O && self) ||\n  check(typeof global == O && global) ||\n  // eslint-disable-next-line no-new-func\n  Function('return this')();\n","var NATIVE_WEAK_MAP = require('../internals/native-weak-map');\nvar global = require('../internals/global');\nvar isObject = require('../internals/is-object');\nvar hide = require('../internals/hide');\nvar objectHas = require('../internals/has');\nvar sharedKey = require('../internals/shared-key');\nvar hiddenKeys = require('../internals/hidden-keys');\n\nvar WeakMap = global.WeakMap;\nvar set, get, has;\n\nvar enforce = function (it) {\n  return has(it) ? get(it) : set(it, {});\n};\n\nvar getterFor = function (TYPE) {\n  return function (it) {\n    var state;\n    if (!isObject(it) || (state = get(it)).type !== TYPE) {\n      throw TypeError('Incompatible receiver, ' + TYPE + ' required');\n    } return state;\n  };\n};\n\nif (NATIVE_WEAK_MAP) {\n  var store = new WeakMap();\n  var wmget = store.get;\n  var wmhas = store.has;\n  var wmset = store.set;\n  set = function (it, metadata) {\n    wmset.call(store, it, metadata);\n    return metadata;\n  };\n  get = function (it) {\n    return wmget.call(store, it) || {};\n  };\n  has = function (it) {\n    return wmhas.call(store, it);\n  };\n} else {\n  var STATE = sharedKey('state');\n  hiddenKeys[STATE] = true;\n  set = function (it, metadata) {\n    hide(it, STATE, metadata);\n    return metadata;\n  };\n  get = function (it) {\n    return objectHas(it, STATE) ? it[STATE] : {};\n  };\n  has = function (it) {\n    return objectHas(it, STATE);\n  };\n}\n\nmodule.exports = {\n  set: set,\n  get: get,\n  has: has,\n  enforce: enforce,\n  getterFor: getterFor\n};\n","module.exports = function (exec) {\n  try {\n    return !!exec();\n  } catch (error) {\n    return true;\n  }\n};\n","var fails = require('../internals/fails');\n\n// Thank's IE8 for his funny defineProperty\nmodule.exports = !fails(function () {\n  return Object.defineProperty({}, 'a', { get: function () { return 7; } }).a != 7;\n});\n","'use strict';\nvar nativePropertyIsEnumerable = {}.propertyIsEnumerable;\nvar getOwnPropertyDescriptor = Object.getOwnPropertyDescriptor;\n\n// Nashorn ~ JDK8 bug\nvar NASHORN_BUG = getOwnPropertyDescriptor && !nativePropertyIsEnumerable.call({ 1: 2 }, 1);\n\nexports.f = NASHORN_BUG ? function propertyIsEnumerable(V) {\n  var descriptor = getOwnPropertyDescriptor(this, V);\n  return !!descriptor && descriptor.enumerable;\n} : nativePropertyIsEnumerable;\n","module.exports = function (bitmap, value) {\n  return {\n    enumerable: !(bitmap & 1),\n    configurable: !(bitmap & 2),\n    writable: !(bitmap & 4),\n    value: value\n  };\n};\n","var toString = {}.toString;\n\nmodule.exports = function (it) {\n  return toString.call(it).slice(8, -1);\n};\n","// fallback for non-array-like ES3 and non-enumerable old V8 strings\nvar fails = require('../internals/fails');\nvar classof = require('../internals/classof-raw');\n\nvar split = ''.split;\n\nmodule.exports = fails(function () {\n  // throws an error in rhino, see https://github.com/mozilla/rhino/issues/346\n  // eslint-disable-next-line no-prototype-builtins\n  return !Object('z').propertyIsEnumerable(0);\n}) ? function (it) {\n  return classof(it) == 'String' ? split.call(it, '') : Object(it);\n} : Object;\n","// `RequireObjectCoercible` abstract operation\n// https://tc39.github.io/ecma262/#sec-requireobjectcoercible\nmodule.exports = function (it) {\n  if (it == undefined) throw TypeError(\"Can't call method on \" + it);\n  return it;\n};\n","// toObject with fallback for non-array-like ES3 strings\nvar IndexedObject = require('../internals/indexed-object');\nvar requireObjectCoercible = require('../internals/require-object-coercible');\n\nmodule.exports = function (it) {\n  return IndexedObject(requireObjectCoercible(it));\n};\n","module.exports = function (it) {\n  return typeof it === 'object' ? it !== null : typeof it === 'function';\n};\n","var isObject = require('../internals/is-object');\n\n// 7.1.1 ToPrimitive(input [, PreferredType])\n// instead of the ES6 spec version, we didn't implement @@toPrimitive case\n// and the second argument - flag - preferred type is a string\nmodule.exports = function (it, S) {\n  if (!isObject(it)) return it;\n  var fn, val;\n  if (S && typeof (fn = it.toString) == 'function' && !isObject(val = fn.call(it))) return val;\n  if (typeof (fn = it.valueOf) == 'function' && !isObject(val = fn.call(it))) return val;\n  if (!S && typeof (fn = it.toString) == 'function' && !isObject(val = fn.call(it))) return val;\n  throw TypeError(\"Can't convert object to primitive value\");\n};\n","var hasOwnProperty = {}.hasOwnProperty;\n\nmodule.exports = function (it, key) {\n  return hasOwnProperty.call(it, key);\n};\n","var global = require('../internals/global');\nvar isObject = require('../internals/is-object');\n\nvar document = global.document;\n// typeof document.createElement is 'object' in old IE\nvar exist = isObject(document) && isObject(document.createElement);\n\nmodule.exports = function (it) {\n  return exist ? document.createElement(it) : {};\n};\n","var DESCRIPTORS = require('../internals/descriptors');\nvar fails = require('../internals/fails');\nvar createElement = require('../internals/document-create-element');\n\n// Thank's IE8 for his funny defineProperty\nmodule.exports = !DESCRIPTORS && !fails(function () {\n  return Object.defineProperty(createElement('div'), 'a', {\n    get: function () { return 7; }\n  }).a != 7;\n});\n","var DESCRIPTORS = require('../internals/descriptors');\nvar propertyIsEnumerableModule = require('../internals/object-property-is-enumerable');\nvar createPropertyDescriptor = require('../internals/create-property-descriptor');\nvar toIndexedObject = require('../internals/to-indexed-object');\nvar toPrimitive = require('../internals/to-primitive');\nvar has = require('../internals/has');\nvar IE8_DOM_DEFINE = require('../internals/ie8-dom-define');\n\nvar nativeGetOwnPropertyDescriptor = Object.getOwnPropertyDescriptor;\n\nexports.f = DESCRIPTORS ? nativeGetOwnPropertyDescriptor : function getOwnPropertyDescriptor(O, P) {\n  O = toIndexedObject(O);\n  P = toPrimitive(P, true);\n  if (IE8_DOM_DEFINE) try {\n    return nativeGetOwnPropertyDescriptor(O, P);\n  } catch (error) { /* empty */ }\n  if (has(O, P)) return createPropertyDescriptor(!propertyIsEnumerableModule.f.call(O, P), O[P]);\n};\n","var isObject = require('../internals/is-object');\n\nmodule.exports = function (it) {\n  if (!isObject(it)) {\n    throw TypeError(String(it) + ' is not an object');\n  } return it;\n};\n","var DESCRIPTORS = require('../internals/descriptors');\nvar IE8_DOM_DEFINE = require('../internals/ie8-dom-define');\nvar anObject = require('../internals/an-object');\nvar toPrimitive = require('../internals/to-primitive');\n\nvar nativeDefineProperty = Object.defineProperty;\n\nexports.f = DESCRIPTORS ? nativeDefineProperty : function defineProperty(O, P, Attributes) {\n  anObject(O);\n  P = toPrimitive(P, true);\n  anObject(Attributes);\n  if (IE8_DOM_DEFINE) try {\n    return nativeDefineProperty(O, P, Attributes);\n  } catch (error) { /* empty */ }\n  if ('get' in Attributes || 'set' in Attributes) throw TypeError('Accessors not supported');\n  if ('value' in Attributes) O[P] = Attributes.value;\n  return O;\n};\n","var DESCRIPTORS = require('../internals/descriptors');\nvar definePropertyModule = require('../internals/object-define-property');\nvar createPropertyDescriptor = require('../internals/create-property-descriptor');\n\nmodule.exports = DESCRIPTORS ? function (object, key, value) {\n  return definePropertyModule.f(object, key, createPropertyDescriptor(1, value));\n} : function (object, key, value) {\n  object[key] = value;\n  return object;\n};\n","var global = require('../internals/global');\nvar hide = require('../internals/hide');\n\nmodule.exports = function (key, value) {\n  try {\n    hide(global, key, value);\n  } catch (error) {\n    global[key] = value;\n  } return value;\n};\n","var global = require('../internals/global');\nvar setGlobal = require('../internals/set-global');\nvar IS_PURE = require('../internals/is-pure');\n\nvar SHARED = '__core-js_shared__';\nvar store = global[SHARED] || setGlobal(SHARED, {});\n\n(module.exports = function (key, value) {\n  return store[key] || (store[key] = value !== undefined ? value : {});\n})('versions', []).push({\n  version: '3.1.3',\n  mode: IS_PURE ? 'pure' : 'global',\n  copyright: '© 2019 Denis Pushkarev (zloirock.ru)'\n});\n","var shared = require('../internals/shared');\n\nmodule.exports = shared('native-function-to-string', Function.toString);\n","var global = require('../internals/global');\nvar nativeFunctionToString = require('../internals/function-to-string');\n\nvar WeakMap = global.WeakMap;\n\nmodule.exports = typeof WeakMap === 'function' && /native code/.test(nativeFunctionToString.call(WeakMap));\n","var id = 0;\nvar postfix = Math.random();\n\nmodule.exports = function (key) {\n  return 'Symbol('.concat(key === undefined ? '' : key, ')_', (++id + postfix).toString(36));\n};\n","var shared = require('../internals/shared');\nvar uid = require('../internals/uid');\n\nvar keys = shared('keys');\n\nmodule.exports = function (key) {\n  return keys[key] || (keys[key] = uid(key));\n};\n","module.exports = {};\n","var global = require('../internals/global');\nvar shared = require('../internals/shared');\nvar hide = require('../internals/hide');\nvar has = require('../internals/has');\nvar setGlobal = require('../internals/set-global');\nvar nativeFunctionToString = require('../internals/function-to-string');\nvar InternalStateModule = require('../internals/internal-state');\n\nvar getInternalState = InternalStateModule.get;\nvar enforceInternalState = InternalStateModule.enforce;\nvar TEMPLATE = String(nativeFunctionToString).split('toString');\n\nshared('inspectSource', function (it) {\n  return nativeFunctionToString.call(it);\n});\n\n(module.exports = function (O, key, value, options) {\n  var unsafe = options ? !!options.unsafe : false;\n  var simple = options ? !!options.enumerable : false;\n  var noTargetGet = options ? !!options.noTargetGet : false;\n  if (typeof value == 'function') {\n    if (typeof key == 'string' && !has(value, 'name')) hide(value, 'name', key);\n    enforceInternalState(value).source = TEMPLATE.join(typeof key == 'string' ? key : '');\n  }\n  if (O === global) {\n    if (simple) O[key] = value;\n    else setGlobal(key, value);\n    return;\n  } else if (!unsafe) {\n    delete O[key];\n  } else if (!noTargetGet && O[key]) {\n    simple = true;\n  }\n  if (simple) O[key] = value;\n  else hide(O, key, value);\n// add fake Function#toString for correct work wrapped methods / constructors with methods like LoDash isNative\n})(Function.prototype, 'toString', function toString() {\n  return typeof this == 'function' && getInternalState(this).source || nativeFunctionToString.call(this);\n});\n","var ceil = Math.ceil;\nvar floor = Math.floor;\n\n// `ToInteger` abstract operation\n// https://tc39.github.io/ecma262/#sec-tointeger\nmodule.exports = function (argument) {\n  return isNaN(argument = +argument) ? 0 : (argument > 0 ? floor : ceil)(argument);\n};\n","var toInteger = require('../internals/to-integer');\n\nvar min = Math.min;\n\n// `ToLength` abstract operation\n// https://tc39.github.io/ecma262/#sec-tolength\nmodule.exports = function (argument) {\n  return argument > 0 ? min(toInteger(argument), 0x1FFFFFFFFFFFFF) : 0; // 2 ** 53 - 1 == 9007199254740991\n};\n","var toInteger = require('../internals/to-integer');\n\nvar max = Math.max;\nvar min = Math.min;\n\n// Helper for a popular repeating case of the spec:\n// Let integer be ? ToInteger(index).\n// If integer < 0, let result be max((length + integer), 0); else let result be min(length, length).\nmodule.exports = function (index, length) {\n  var integer = toInteger(index);\n  return integer < 0 ? max(integer + length, 0) : min(integer, length);\n};\n","var toIndexedObject = require('../internals/to-indexed-object');\nvar toLength = require('../internals/to-length');\nvar toAbsoluteIndex = require('../internals/to-absolute-index');\n\n// `Array.prototype.{ indexOf, includes }` methods implementation\n// false -> Array#indexOf\n// https://tc39.github.io/ecma262/#sec-array.prototype.indexof\n// true  -> Array#includes\n// https://tc39.github.io/ecma262/#sec-array.prototype.includes\nmodule.exports = function (IS_INCLUDES) {\n  return function ($this, el, fromIndex) {\n    var O = toIndexedObject($this);\n    var length = toLength(O.length);\n    var index = toAbsoluteIndex(fromIndex, length);\n    var value;\n    // Array#includes uses SameValueZero equality algorithm\n    // eslint-disable-next-line no-self-compare\n    if (IS_INCLUDES && el != el) while (length > index) {\n      value = O[index++];\n      // eslint-disable-next-line no-self-compare\n      if (value != value) return true;\n    // Array#indexOf ignores holes, Array#includes - not\n    } else for (;length > index; index++) if (IS_INCLUDES || index in O) {\n      if (O[index] === el) return IS_INCLUDES || index || 0;\n    } return !IS_INCLUDES && -1;\n  };\n};\n","var has = require('../internals/has');\nvar toIndexedObject = require('../internals/to-indexed-object');\nvar arrayIncludes = require('../internals/array-includes');\nvar hiddenKeys = require('../internals/hidden-keys');\n\nvar arrayIndexOf = arrayIncludes(false);\n\nmodule.exports = function (object, names) {\n  var O = toIndexedObject(object);\n  var i = 0;\n  var result = [];\n  var key;\n  for (key in O) !has(hiddenKeys, key) && has(O, key) && result.push(key);\n  // Don't enum bug & hidden keys\n  while (names.length > i) if (has(O, key = names[i++])) {\n    ~arrayIndexOf(result, key) || result.push(key);\n  }\n  return result;\n};\n","// IE8- don't enum bug keys\nmodule.exports = [\n  'constructor',\n  'hasOwnProperty',\n  'isPrototypeOf',\n  'propertyIsEnumerable',\n  'toLocaleString',\n  'toString',\n  'valueOf'\n];\n","// 19.1.2.7 / 15.2.3.4 Object.getOwnPropertyNames(O)\nvar internalObjectKeys = require('../internals/object-keys-internal');\nvar enumBugKeys = require('../internals/enum-bug-keys');\n\nvar hiddenKeys = enumBugKeys.concat('length', 'prototype');\n\nexports.f = Object.getOwnPropertyNames || function getOwnPropertyNames(O) {\n  return internalObjectKeys(O, hiddenKeys);\n};\n","exports.f = Object.getOwnPropertySymbols;\n","var global = require('../internals/global');\nvar getOwnPropertyNamesModule = require('../internals/object-get-own-property-names');\nvar getOwnPropertySymbolsModule = require('../internals/object-get-own-property-symbols');\nvar anObject = require('../internals/an-object');\n\nvar Reflect = global.Reflect;\n\n// all object keys, includes non-enumerable and symbols\nmodule.exports = Reflect && Reflect.ownKeys || function ownKeys(it) {\n  var keys = getOwnPropertyNamesModule.f(anObject(it));\n  var getOwnPropertySymbols = getOwnPropertySymbolsModule.f;\n  return getOwnPropertySymbols ? keys.concat(getOwnPropertySymbols(it)) : keys;\n};\n","var has = require('../internals/has');\nvar ownKeys = require('../internals/own-keys');\nvar getOwnPropertyDescriptorModule = require('../internals/object-get-own-property-descriptor');\nvar definePropertyModule = require('../internals/object-define-property');\n\nmodule.exports = function (target, source) {\n  var keys = ownKeys(source);\n  var defineProperty = definePropertyModule.f;\n  var getOwnPropertyDescriptor = getOwnPropertyDescriptorModule.f;\n  for (var i = 0; i < keys.length; i++) {\n    var key = keys[i];\n    if (!has(target, key)) defineProperty(target, key, getOwnPropertyDescriptor(source, key));\n  }\n};\n","var fails = require('../internals/fails');\n\nvar replacement = /#|\\.prototype\\./;\n\nvar isForced = function (feature, detection) {\n  var value = data[normalize(feature)];\n  return value == POLYFILL ? true\n    : value == NATIVE ? false\n    : typeof detection == 'function' ? fails(detection)\n    : !!detection;\n};\n\nvar normalize = isForced.normalize = function (string) {\n  return String(string).replace(replacement, '.').toLowerCase();\n};\n\nvar data = isForced.data = {};\nvar NATIVE = isForced.NATIVE = 'N';\nvar POLYFILL = isForced.POLYFILL = 'P';\n\nmodule.exports = isForced;\n","var global = require('../internals/global');\nvar getOwnPropertyDescriptor = require('../internals/object-get-own-property-descriptor').f;\nvar hide = require('../internals/hide');\nvar redefine = require('../internals/redefine');\nvar setGlobal = require('../internals/set-global');\nvar copyConstructorProperties = require('../internals/copy-constructor-properties');\nvar isForced = require('../internals/is-forced');\n\n/*\n  options.target      - name of the target object\n  options.global      - target is the global object\n  options.stat        - export as static methods of target\n  options.proto       - export as prototype methods of target\n  options.real        - real prototype method for the `pure` version\n  options.forced      - export even if the native feature is available\n  options.bind        - bind methods to the target, required for the `pure` version\n  options.wrap        - wrap constructors to preventing global pollution, required for the `pure` version\n  options.unsafe      - use the simple assignment of property instead of delete + defineProperty\n  options.sham        - add a flag to not completely full polyfills\n  options.enumerable  - export as enumerable property\n  options.noTargetGet - prevent calling a getter on target\n*/\nmodule.exports = function (options, source) {\n  var TARGET = options.target;\n  var GLOBAL = options.global;\n  var STATIC = options.stat;\n  var FORCED, target, key, targetProperty, sourceProperty, descriptor;\n  if (GLOBAL) {\n    target = global;\n  } else if (STATIC) {\n    target = global[TARGET] || setGlobal(TARGET, {});\n  } else {\n    target = (global[TARGET] || {}).prototype;\n  }\n  if (target) for (key in source) {\n    sourceProperty = source[key];\n    if (options.noTargetGet) {\n      descriptor = getOwnPropertyDescriptor(target, key);\n      targetProperty = descriptor && descriptor.value;\n    } else targetProperty = target[key];\n    FORCED = isForced(GLOBAL ? key : TARGET + (STATIC ? '.' : '#') + key, options.forced);\n    // contained in target\n    if (!FORCED && targetProperty !== undefined) {\n      if (typeof sourceProperty === typeof targetProperty) continue;\n      copyConstructorProperties(sourceProperty, targetProperty);\n    }\n    // add a flag to not completely full polyfills\n    if (options.sham || (targetProperty && targetProperty.sham)) {\n      hide(sourceProperty, 'sham', true);\n    }\n    // extend global\n    redefine(target, key, sourceProperty, options);\n  }\n};\n","module.exports = function (it) {\n  if (typeof it != 'function') {\n    throw TypeError(String(it) + ' is not a function');\n  } return it;\n};\n","var requireObjectCoercible = require('../internals/require-object-coercible');\n\n// `ToObject` abstract operation\n// https://tc39.github.io/ecma262/#sec-toobject\nmodule.exports = function (argument) {\n  return Object(requireObjectCoercible(argument));\n};\n","var classof = require('../internals/classof-raw');\n\n// `IsArray` abstract operation\n// https://tc39.github.io/ecma262/#sec-isarray\nmodule.exports = Array.isArray || function isArray(arg) {\n  return classof(arg) == 'Array';\n};\n","var fails = require('../internals/fails');\n\nmodule.exports = !!Object.getOwnPropertySymbols && !fails(function () {\n  // Chrome 38 Symbol has incorrect toString conversion\n  // eslint-disable-next-line no-undef\n  return !String(Symbol());\n});\n","var global = require('../internals/global');\nvar shared = require('../internals/shared');\nvar uid = require('../internals/uid');\nvar NATIVE_SYMBOL = require('../internals/native-symbol');\n\nvar Symbol = global.Symbol;\nvar store = shared('wks');\n\nmodule.exports = function (name) {\n  return store[name] || (store[name] = NATIVE_SYMBOL && Symbol[name]\n    || (NATIVE_SYMBOL ? Symbol : uid)('Symbol.' + name));\n};\n","var isObject = require('../internals/is-object');\nvar isArray = require('../internals/is-array');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\n\nvar SPECIES = wellKnownSymbol('species');\n\n// `ArraySpeciesCreate` abstract operation\n// https://tc39.github.io/ecma262/#sec-arrayspeciescreate\nmodule.exports = function (originalArray, length) {\n  var C;\n  if (isArray(originalArray)) {\n    C = originalArray.constructor;\n    // cross-realm fallback\n    if (typeof C == 'function' && (C === Array || isArray(C.prototype))) C = undefined;\n    else if (isObject(C)) {\n      C = C[SPECIES];\n      if (C === null) C = undefined;\n    }\n  } return new (C === undefined ? Array : C)(length === 0 ? 0 : length);\n};\n","var bind = require('../internals/bind-context');\nvar IndexedObject = require('../internals/indexed-object');\nvar toObject = require('../internals/to-object');\nvar toLength = require('../internals/to-length');\nvar arraySpeciesCreate = require('../internals/array-species-create');\n\n// `Array.prototype.{ forEach, map, filter, some, every, find, findIndex }` methods implementation\n// 0 -> Array#forEach\n// https://tc39.github.io/ecma262/#sec-array.prototype.foreach\n// 1 -> Array#map\n// https://tc39.github.io/ecma262/#sec-array.prototype.map\n// 2 -> Array#filter\n// https://tc39.github.io/ecma262/#sec-array.prototype.filter\n// 3 -> Array#some\n// https://tc39.github.io/ecma262/#sec-array.prototype.some\n// 4 -> Array#every\n// https://tc39.github.io/ecma262/#sec-array.prototype.every\n// 5 -> Array#find\n// https://tc39.github.io/ecma262/#sec-array.prototype.find\n// 6 -> Array#findIndex\n// https://tc39.github.io/ecma262/#sec-array.prototype.findIndex\nmodule.exports = function (TYPE, specificCreate) {\n  var IS_MAP = TYPE == 1;\n  var IS_FILTER = TYPE == 2;\n  var IS_SOME = TYPE == 3;\n  var IS_EVERY = TYPE == 4;\n  var IS_FIND_INDEX = TYPE == 6;\n  var NO_HOLES = TYPE == 5 || IS_FIND_INDEX;\n  var create = specificCreate || arraySpeciesCreate;\n  return function ($this, callbackfn, that) {\n    var O = toObject($this);\n    var self = IndexedObject(O);\n    var boundFunction = bind(callbackfn, that, 3);\n    var length = toLength(self.length);\n    var index = 0;\n    var target = IS_MAP ? create($this, length) : IS_FILTER ? create($this, 0) : undefined;\n    var value, result;\n    for (;length > index; index++) if (NO_HOLES || index in self) {\n      value = self[index];\n      result = boundFunction(value, index, O);\n      if (TYPE) {\n        if (IS_MAP) target[index] = result; // map\n        else if (result) switch (TYPE) {\n          case 3: return true;              // some\n          case 5: return value;             // find\n          case 6: return index;             // findIndex\n          case 2: target.push(value);       // filter\n        } else if (IS_EVERY) return false;  // every\n      }\n    }\n    return IS_FIND_INDEX ? -1 : IS_SOME || IS_EVERY ? IS_EVERY : target;\n  };\n};\n","var aFunction = require('../internals/a-function');\n\n// optional / simple context binding\nmodule.exports = function (fn, that, length) {\n  aFunction(fn);\n  if (that === undefined) return fn;\n  switch (length) {\n    case 0: return function () {\n      return fn.call(that);\n    };\n    case 1: return function (a) {\n      return fn.call(that, a);\n    };\n    case 2: return function (a, b) {\n      return fn.call(that, a, b);\n    };\n    case 3: return function (a, b, c) {\n      return fn.call(that, a, b, c);\n    };\n  }\n  return function (/* ...args */) {\n    return fn.apply(that, arguments);\n  };\n};\n","var fails = require('../internals/fails');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\n\nvar SPECIES = wellKnownSymbol('species');\n\nmodule.exports = function (METHOD_NAME) {\n  return !fails(function () {\n    var array = [];\n    var constructor = array.constructor = {};\n    constructor[SPECIES] = function () {\n      return { foo: 1 };\n    };\n    return array[METHOD_NAME](Boolean).foo !== 1;\n  });\n};\n","'use strict';\nvar $ = require('../internals/export');\nvar arrayMethods = require('../internals/array-methods');\nvar arrayMethodHasSpeciesSupport = require('../internals/array-method-has-species-support');\n\nvar internalFilter = arrayMethods(2);\nvar SPECIES_SUPPORT = arrayMethodHasSpeciesSupport('filter');\n\n// `Array.prototype.filter` method\n// https://tc39.github.io/ecma262/#sec-array.prototype.filter\n// with adding support of @@species\n$({ target: 'Array', proto: true, forced: !SPECIES_SUPPORT }, {\n  filter: function filter(callbackfn /* , thisArg */) {\n    return internalFilter(this, callbackfn, arguments[1]);\n  }\n});\n","'use strict';\nvar fails = require('../internals/fails');\n\nmodule.exports = function (METHOD_NAME, argument) {\n  var method = [][METHOD_NAME];\n  return !method || !fails(function () {\n    // eslint-disable-next-line no-useless-call,no-throw-literal\n    method.call(null, argument || function () { throw 1; }, 1);\n  });\n};\n","'use strict';\nvar arrayMethods = require('../internals/array-methods');\nvar sloppyArrayMethod = require('../internals/sloppy-array-method');\n\nvar internalForEach = arrayMethods(0);\nvar SLOPPY_METHOD = sloppyArrayMethod('forEach');\n\n// `Array.prototype.forEach` method implementation\n// https://tc39.github.io/ecma262/#sec-array.prototype.foreach\nmodule.exports = SLOPPY_METHOD ? function forEach(callbackfn /* , thisArg */) {\n  return internalForEach(this, callbackfn, arguments[1]);\n} : [].forEach;\n","'use strict';\nvar $ = require('../internals/export');\nvar forEach = require('../internals/array-for-each');\n\n// `Array.prototype.forEach` method\n// https://tc39.github.io/ecma262/#sec-array.prototype.foreach\n$({ target: 'Array', proto: true, forced: [].forEach != forEach }, {\n  forEach: forEach\n});\n","var internalObjectKeys = require('../internals/object-keys-internal');\nvar enumBugKeys = require('../internals/enum-bug-keys');\n\n// 19.1.2.14 / 15.2.3.14 Object.keys(O)\nmodule.exports = Object.keys || function keys(O) {\n  return internalObjectKeys(O, enumBugKeys);\n};\n","var DESCRIPTORS = require('../internals/descriptors');\nvar definePropertyModule = require('../internals/object-define-property');\nvar anObject = require('../internals/an-object');\nvar objectKeys = require('../internals/object-keys');\n\nmodule.exports = DESCRIPTORS ? Object.defineProperties : function defineProperties(O, Properties) {\n  anObject(O);\n  var keys = objectKeys(Properties);\n  var length = keys.length;\n  var i = 0;\n  var key;\n  while (length > i) definePropertyModule.f(O, key = keys[i++], Properties[key]);\n  return O;\n};\n","var global = require('../internals/global');\n\nvar document = global.document;\n\nmodule.exports = document && document.documentElement;\n","var anObject = require('../internals/an-object');\nvar defineProperties = require('../internals/object-define-properties');\nvar enumBugKeys = require('../internals/enum-bug-keys');\nvar hiddenKeys = require('../internals/hidden-keys');\nvar html = require('../internals/html');\nvar documentCreateElement = require('../internals/document-create-element');\nvar sharedKey = require('../internals/shared-key');\nvar IE_PROTO = sharedKey('IE_PROTO');\n\nvar PROTOTYPE = 'prototype';\nvar Empty = function () { /* empty */ };\n\n// Create object with fake `null` prototype: use iframe Object with cleared prototype\nvar createDict = function () {\n  // Thrash, waste and sodomy: IE GC bug\n  var iframe = documentCreateElement('iframe');\n  var length = enumBugKeys.length;\n  var lt = '<';\n  var script = 'script';\n  var gt = '>';\n  var js = 'java' + script + ':';\n  var iframeDocument;\n  iframe.style.display = 'none';\n  html.appendChild(iframe);\n  iframe.src = String(js);\n  iframeDocument = iframe.contentWindow.document;\n  iframeDocument.open();\n  iframeDocument.write(lt + script + gt + 'document.F=Object' + lt + '/' + script + gt);\n  iframeDocument.close();\n  createDict = iframeDocument.F;\n  while (length--) delete createDict[PROTOTYPE][enumBugKeys[length]];\n  return createDict();\n};\n\n// 19.1.2.2 / 15.2.3.5 Object.create(O [, Properties])\nmodule.exports = Object.create || function create(O, Properties) {\n  var result;\n  if (O !== null) {\n    Empty[PROTOTYPE] = anObject(O);\n    result = new Empty();\n    Empty[PROTOTYPE] = null;\n    // add \"__proto__\" for Object.getPrototypeOf polyfill\n    result[IE_PROTO] = O;\n  } else result = createDict();\n  return Properties === undefined ? result : defineProperties(result, Properties);\n};\n\nhiddenKeys[IE_PROTO] = true;\n","var wellKnownSymbol = require('../internals/well-known-symbol');\nvar create = require('../internals/object-create');\nvar hide = require('../internals/hide');\n\nvar UNSCOPABLES = wellKnownSymbol('unscopables');\nvar ArrayPrototype = Array.prototype;\n\n// Array.prototype[@@unscopables]\n// https://tc39.github.io/ecma262/#sec-array.prototype-@@unscopables\nif (ArrayPrototype[UNSCOPABLES] == undefined) {\n  hide(ArrayPrototype, UNSCOPABLES, create(null));\n}\n\n// add a key to Array.prototype[@@unscopables]\nmodule.exports = function (key) {\n  ArrayPrototype[UNSCOPABLES][key] = true;\n};\n","'use strict';\nvar $ = require('../internals/export');\nvar arrayIncludes = require('../internals/array-includes');\nvar addToUnscopables = require('../internals/add-to-unscopables');\n\nvar internalIncludes = arrayIncludes(true);\n\n// `Array.prototype.includes` method\n// https://tc39.github.io/ecma262/#sec-array.prototype.includes\n$({ target: 'Array', proto: true }, {\n  includes: function includes(el /* , fromIndex = 0 */) {\n    return internalIncludes(this, el, arguments.length > 1 ? arguments[1] : undefined);\n  }\n});\n\n// https://tc39.github.io/ecma262/#sec-array.prototype-@@unscopables\naddToUnscopables('includes');\n","'use strict';\nvar $ = require('../internals/export');\nvar sloppyArrayMethod = require('../internals/sloppy-array-method');\nvar arrayIncludes = require('../internals/array-includes');\n\nvar internalIndexOf = arrayIncludes(false);\nvar nativeIndexOf = [].indexOf;\n\nvar NEGATIVE_ZERO = !!nativeIndexOf && 1 / [1].indexOf(1, -0) < 0;\nvar SLOPPY_METHOD = sloppyArrayMethod('indexOf');\n\n// `Array.prototype.indexOf` method\n// https://tc39.github.io/ecma262/#sec-array.prototype.indexof\n$({ target: 'Array', proto: true, forced: NEGATIVE_ZERO || SLOPPY_METHOD }, {\n  indexOf: function indexOf(searchElement /* , fromIndex = 0 */) {\n    return NEGATIVE_ZERO\n      // convert -0 to +0\n      ? nativeIndexOf.apply(this, arguments) || 0\n      : internalIndexOf(this, searchElement, arguments[1]);\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar IndexedObject = require('../internals/indexed-object');\nvar toIndexedObject = require('../internals/to-indexed-object');\nvar sloppyArrayMethod = require('../internals/sloppy-array-method');\n\nvar nativeJoin = [].join;\n\nvar ES3_STRINGS = IndexedObject != Object;\nvar SLOPPY_METHOD = sloppyArrayMethod('join', ',');\n\n// `Array.prototype.join` method\n// https://tc39.github.io/ecma262/#sec-array.prototype.join\n$({ target: 'Array', proto: true, forced: ES3_STRINGS || SLOPPY_METHOD }, {\n  join: function join(separator) {\n    return nativeJoin.call(toIndexedObject(this), separator === undefined ? ',' : separator);\n  }\n});\n","'use strict';\nvar toPrimitive = require('../internals/to-primitive');\nvar definePropertyModule = require('../internals/object-define-property');\nvar createPropertyDescriptor = require('../internals/create-property-descriptor');\n\nmodule.exports = function (object, key, value) {\n  var propertyKey = toPrimitive(key);\n  if (propertyKey in object) definePropertyModule.f(object, propertyKey, createPropertyDescriptor(0, value));\n  else object[propertyKey] = value;\n};\n","'use strict';\nvar $ = require('../internals/export');\nvar toAbsoluteIndex = require('../internals/to-absolute-index');\nvar toInteger = require('../internals/to-integer');\nvar toLength = require('../internals/to-length');\nvar toObject = require('../internals/to-object');\nvar arraySpeciesCreate = require('../internals/array-species-create');\nvar createProperty = require('../internals/create-property');\nvar arrayMethodHasSpeciesSupport = require('../internals/array-method-has-species-support');\n\nvar max = Math.max;\nvar min = Math.min;\nvar MAX_SAFE_INTEGER = 0x1FFFFFFFFFFFFF;\nvar MAXIMUM_ALLOWED_LENGTH_EXCEEDED = 'Maximum allowed length exceeded';\n\nvar SPECIES_SUPPORT = arrayMethodHasSpeciesSupport('splice');\n\n// `Array.prototype.splice` method\n// https://tc39.github.io/ecma262/#sec-array.prototype.splice\n// with adding support of @@species\n$({ target: 'Array', proto: true, forced: !SPECIES_SUPPORT }, {\n  splice: function splice(start, deleteCount /* , ...items */) {\n    var O = toObject(this);\n    var len = toLength(O.length);\n    var actualStart = toAbsoluteIndex(start, len);\n    var argumentsLength = arguments.length;\n    var insertCount, actualDeleteCount, A, k, from, to;\n    if (argumentsLength === 0) {\n      insertCount = actualDeleteCount = 0;\n    } else if (argumentsLength === 1) {\n      insertCount = 0;\n      actualDeleteCount = len - actualStart;\n    } else {\n      insertCount = argumentsLength - 2;\n      actualDeleteCount = min(max(toInteger(deleteCount), 0), len - actualStart);\n    }\n    if (len + insertCount - actualDeleteCount > MAX_SAFE_INTEGER) {\n      throw TypeError(MAXIMUM_ALLOWED_LENGTH_EXCEEDED);\n    }\n    A = arraySpeciesCreate(O, actualDeleteCount);\n    for (k = 0; k < actualDeleteCount; k++) {\n      from = actualStart + k;\n      if (from in O) createProperty(A, k, O[from]);\n    }\n    A.length = actualDeleteCount;\n    if (insertCount < actualDeleteCount) {\n      for (k = actualStart; k < len - actualDeleteCount; k++) {\n        from = k + actualDeleteCount;\n        to = k + insertCount;\n        if (from in O) O[to] = O[from];\n        else delete O[to];\n      }\n      for (k = len; k > len - actualDeleteCount + insertCount; k--) delete O[k - 1];\n    } else if (insertCount > actualDeleteCount) {\n      for (k = len - actualDeleteCount; k > actualStart; k--) {\n        from = k + actualDeleteCount - 1;\n        to = k + insertCount - 1;\n        if (from in O) O[to] = O[from];\n        else delete O[to];\n      }\n    }\n    for (k = 0; k < insertCount; k++) {\n      O[k + actualStart] = arguments[k + 2];\n    }\n    O.length = len - actualDeleteCount + insertCount;\n    return A;\n  }\n});\n","var isObject = require('../internals/is-object');\nvar classof = require('../internals/classof-raw');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\n\nvar MATCH = wellKnownSymbol('match');\n\n// `IsRegExp` abstract operation\n// https://tc39.github.io/ecma262/#sec-isregexp\nmodule.exports = function (it) {\n  var isRegExp;\n  return isObject(it) && ((isRegExp = it[MATCH]) !== undefined ? !!isRegExp : classof(it) == 'RegExp');\n};\n","var wellKnownSymbol = require('../internals/well-known-symbol');\n\nvar MATCH = wellKnownSymbol('match');\n\nmodule.exports = function (METHOD_NAME) {\n  var regexp = /./;\n  try {\n    '/./'[METHOD_NAME](regexp);\n  } catch (e) {\n    try {\n      regexp[MATCH] = false;\n      return '/./'[METHOD_NAME](regexp);\n    } catch (f) { /* empty */ }\n  } return false;\n};\n","'use strict';\nvar $ = require('../internals/export');\nvar validateArguments = require('../internals/validate-string-method-arguments');\nvar correctIsRegExpLogic = require('../internals/correct-is-regexp-logic');\n\n// `String.prototype.includes` method\n// https://tc39.github.io/ecma262/#sec-string.prototype.includes\n$({ target: 'String', proto: true, forced: !correctIsRegExpLogic('includes') }, {\n  includes: function includes(searchString /* , position = 0 */) {\n    return !!~validateArguments(this, searchString, 'includes')\n      .indexOf(searchString, arguments.length > 1 ? arguments[1] : undefined);\n  }\n});\n","// helper for String#{startsWith, endsWith, includes}\nvar isRegExp = require('../internals/is-regexp');\nvar requireObjectCoercible = require('../internals/require-object-coercible');\n\nmodule.exports = function (that, searchString, NAME) {\n  if (isRegExp(searchString)) {\n    throw TypeError('String.prototype.' + NAME + \" doesn't accept regex\");\n  } return String(requireObjectCoercible(that));\n};\n","var global = require('../internals/global');\nvar DOMIterables = require('../internals/dom-iterables');\nvar forEach = require('../internals/array-for-each');\nvar hide = require('../internals/hide');\n\nfor (var COLLECTION_NAME in DOMIterables) {\n  var Collection = global[COLLECTION_NAME];\n  var CollectionPrototype = Collection && Collection.prototype;\n  // some Chrome versions have non-configurable methods on DOMTokenList\n  if (CollectionPrototype && CollectionPrototype.forEach !== forEach) try {\n    hide(CollectionPrototype, 'forEach', forEach);\n  } catch (error) {\n    CollectionPrototype.forEach = forEach;\n  }\n}\n","// iterable DOM collections\n// flag - `iterable` interface - 'entries', 'keys', 'values', 'forEach' methods\nmodule.exports = {\n  CSSRuleList: 0,\n  CSSStyleDeclaration: 0,\n  CSSValueList: 0,\n  ClientRectList: 0,\n  DOMRectList: 0,\n  DOMStringList: 0,\n  DOMTokenList: 1,\n  DataTransferItemList: 0,\n  FileList: 0,\n  HTMLAllCollection: 0,\n  HTMLCollection: 0,\n  HTMLFormElement: 0,\n  HTMLSelectElement: 0,\n  MediaList: 0,\n  MimeTypeArray: 0,\n  NamedNodeMap: 0,\n  NodeList: 1,\n  PaintRequestList: 0,\n  Plugin: 0,\n  PluginArray: 0,\n  SVGLengthList: 0,\n  SVGNumberList: 0,\n  SVGPathSegList: 0,\n  SVGPointList: 0,\n  SVGStringList: 0,\n  SVGTransformList: 0,\n  SourceBufferList: 0,\n  StyleSheetList: 0,\n  TextTrackCueList: 0,\n  TextTrackList: 0,\n  TouchList: 0\n};\n","'use strict';\nvar $ = require('../internals/export');\nvar arrayMethods = require('../internals/array-methods');\nvar arrayMethodHasSpeciesSupport = require('../internals/array-method-has-species-support');\n\nvar internalMap = arrayMethods(1);\nvar SPECIES_SUPPORT = arrayMethodHasSpeciesSupport('map');\n\n// `Array.prototype.map` method\n// https://tc39.github.io/ecma262/#sec-array.prototype.map\n// with adding support of @@species\n$({ target: 'Array', proto: true, forced: !SPECIES_SUPPORT }, {\n  map: function map(callbackfn /* , thisArg */) {\n    return internalMap(this, callbackfn, arguments[1]);\n  }\n});\n","var isObject = require('../internals/is-object');\nvar anObject = require('../internals/an-object');\n\nmodule.exports = function (O, proto) {\n  anObject(O);\n  if (!isObject(proto) && proto !== null) {\n    throw TypeError(\"Can't set \" + String(proto) + ' as a prototype');\n  }\n};\n","var validateSetPrototypeOfArguments = require('../internals/validate-set-prototype-of-arguments');\n\n// Works with __proto__ only. Old v8 can't work with null proto objects.\n/* eslint-disable no-proto */\nmodule.exports = Object.setPrototypeOf || ('__proto__' in {} ? function () {\n  var correctSetter = false;\n  var test = {};\n  var setter;\n  try {\n    setter = Object.getOwnPropertyDescriptor(Object.prototype, '__proto__').set;\n    setter.call(test, []);\n    correctSetter = test instanceof Array;\n  } catch (error) { /* empty */ }\n  return function setPrototypeOf(O, proto) {\n    validateSetPrototypeOfArguments(O, proto);\n    if (correctSetter) setter.call(O, proto);\n    else O.__proto__ = proto;\n    return O;\n  };\n}() : undefined);\n","// a string of all valid unicode whitespaces\n// eslint-disable-next-line max-len\nmodule.exports = '\\u0009\\u000A\\u000B\\u000C\\u000D\\u0020\\u00A0\\u1680\\u2000\\u2001\\u2002\\u2003\\u2004\\u2005\\u2006\\u2007\\u2008\\u2009\\u200A\\u202F\\u205F\\u3000\\u2028\\u2029\\uFEFF';\n","var requireObjectCoercible = require('../internals/require-object-coercible');\nvar whitespaces = require('../internals/whitespaces');\n\nvar whitespace = '[' + whitespaces + ']';\nvar ltrim = RegExp('^' + whitespace + whitespace + '*');\nvar rtrim = RegExp(whitespace + whitespace + '*$');\n\n// 1 -> String#trimStart\n// 2 -> String#trimEnd\n// 3 -> String#trim\nmodule.exports = function (string, TYPE) {\n  string = String(requireObjectCoercible(string));\n  if (TYPE & 1) string = string.replace(ltrim, '');\n  if (TYPE & 2) string = string.replace(rtrim, '');\n  return string;\n};\n","'use strict';\nvar DESCRIPTORS = require('../internals/descriptors');\nvar global = require('../internals/global');\nvar isForced = require('../internals/is-forced');\nvar redefine = require('../internals/redefine');\nvar has = require('../internals/has');\nvar classof = require('../internals/classof-raw');\nvar inheritIfRequired = require('../internals/inherit-if-required');\nvar toPrimitive = require('../internals/to-primitive');\nvar fails = require('../internals/fails');\nvar create = require('../internals/object-create');\nvar getOwnPropertyNames = require('../internals/object-get-own-property-names').f;\nvar getOwnPropertyDescriptor = require('../internals/object-get-own-property-descriptor').f;\nvar defineProperty = require('../internals/object-define-property').f;\nvar internalStringTrim = require('../internals/string-trim');\n\nvar NUMBER = 'Number';\nvar NativeNumber = global[NUMBER];\nvar NumberPrototype = NativeNumber.prototype;\n\n// Opera ~12 has broken Object#toString\nvar BROKEN_CLASSOF = classof(create(NumberPrototype)) == NUMBER;\nvar NATIVE_TRIM = 'trim' in String.prototype;\n\n// `ToNumber` abstract operation\n// https://tc39.github.io/ecma262/#sec-tonumber\nvar toNumber = function (argument) {\n  var it = toPrimitive(argument, false);\n  var first, third, radix, maxCode, digits, length, i, code;\n  if (typeof it == 'string' && it.length > 2) {\n    it = NATIVE_TRIM ? it.trim() : internalStringTrim(it, 3);\n    first = it.charCodeAt(0);\n    if (first === 43 || first === 45) {\n      third = it.charCodeAt(2);\n      if (third === 88 || third === 120) return NaN; // Number('+0x1') should be NaN, old V8 fix\n    } else if (first === 48) {\n      switch (it.charCodeAt(1)) {\n        case 66: case 98: radix = 2; maxCode = 49; break; // fast equal of /^0b[01]+$/i\n        case 79: case 111: radix = 8; maxCode = 55; break; // fast equal of /^0o[0-7]+$/i\n        default: return +it;\n      }\n      digits = it.slice(2);\n      length = digits.length;\n      for (i = 0; i < length; i++) {\n        code = digits.charCodeAt(i);\n        // parseInt parses a string to a first unavailable symbol\n        // but ToNumber should return NaN if a string contains unavailable symbols\n        if (code < 48 || code > maxCode) return NaN;\n      } return parseInt(digits, radix);\n    }\n  } return +it;\n};\n\n// `Number` constructor\n// https://tc39.github.io/ecma262/#sec-number-constructor\nif (isForced(NUMBER, !NativeNumber(' 0o1') || !NativeNumber('0b1') || NativeNumber('+0x1'))) {\n  var NumberWrapper = function Number(value) {\n    var it = arguments.length < 1 ? 0 : value;\n    var that = this;\n    return that instanceof NumberWrapper\n      // check on 1..constructor(foo) case\n      && (BROKEN_CLASSOF ? fails(function () { NumberPrototype.valueOf.call(that); }) : classof(that) != NUMBER)\n        ? inheritIfRequired(new NativeNumber(toNumber(it)), that, NumberWrapper) : toNumber(it);\n  };\n  for (var keys = DESCRIPTORS ? getOwnPropertyNames(NativeNumber) : (\n    // ES3:\n    'MAX_VALUE,MIN_VALUE,NaN,NEGATIVE_INFINITY,POSITIVE_INFINITY,' +\n    // ES2015 (in case, if modules with ES2015 Number statics required before):\n    'EPSILON,isFinite,isInteger,isNaN,isSafeInteger,MAX_SAFE_INTEGER,' +\n    'MIN_SAFE_INTEGER,parseFloat,parseInt,isInteger'\n  ).split(','), j = 0, key; keys.length > j; j++) {\n    if (has(NativeNumber, key = keys[j]) && !has(NumberWrapper, key)) {\n      defineProperty(NumberWrapper, key, getOwnPropertyDescriptor(NativeNumber, key));\n    }\n  }\n  NumberWrapper.prototype = NumberPrototype;\n  NumberPrototype.constructor = NumberWrapper;\n  redefine(global, NUMBER, NumberWrapper);\n}\n","var isObject = require('../internals/is-object');\nvar setPrototypeOf = require('../internals/object-set-prototype-of');\n\nmodule.exports = function (that, target, C) {\n  var S = target.constructor;\n  var P;\n  if (S !== C && typeof S == 'function' && (P = S.prototype) !== C.prototype && isObject(P) && setPrototypeOf) {\n    setPrototypeOf(that, P);\n  } return that;\n};\n","'use strict';\nvar anObject = require('../internals/an-object');\n\n// `RegExp.prototype.flags` getter implementation\n// https://tc39.github.io/ecma262/#sec-get-regexp.prototype.flags\nmodule.exports = function () {\n  var that = anObject(this);\n  var result = '';\n  if (that.global) result += 'g';\n  if (that.ignoreCase) result += 'i';\n  if (that.multiline) result += 'm';\n  if (that.unicode) result += 'u';\n  if (that.sticky) result += 'y';\n  return result;\n};\n","'use strict';\nvar regexpFlags = require('./regexp-flags');\n\nvar nativeExec = RegExp.prototype.exec;\n// This always refers to the native implementation, because the\n// String#replace polyfill uses ./fix-regexp-well-known-symbol-logic.js,\n// which loads this file before patching the method.\nvar nativeReplace = String.prototype.replace;\n\nvar patchedExec = nativeExec;\n\nvar UPDATES_LAST_INDEX_WRONG = (function () {\n  var re1 = /a/;\n  var re2 = /b*/g;\n  nativeExec.call(re1, 'a');\n  nativeExec.call(re2, 'a');\n  return re1.lastIndex !== 0 || re2.lastIndex !== 0;\n})();\n\n// nonparticipating capturing group, copied from es5-shim's String#split patch.\nvar NPCG_INCLUDED = /()??/.exec('')[1] !== undefined;\n\nvar PATCH = UPDATES_LAST_INDEX_WRONG || NPCG_INCLUDED;\n\nif (PATCH) {\n  patchedExec = function exec(str) {\n    var re = this;\n    var lastIndex, reCopy, match, i;\n\n    if (NPCG_INCLUDED) {\n      reCopy = new RegExp('^' + re.source + '$(?!\\\\s)', regexpFlags.call(re));\n    }\n    if (UPDATES_LAST_INDEX_WRONG) lastIndex = re.lastIndex;\n\n    match = nativeExec.call(re, str);\n\n    if (UPDATES_LAST_INDEX_WRONG && match) {\n      re.lastIndex = re.global ? match.index + match[0].length : lastIndex;\n    }\n    if (NPCG_INCLUDED && match && match.length > 1) {\n      // Fix browsers whose `exec` methods don't consistently return `undefined`\n      // for NPCG, like IE8. NOTE: This doesn' work for /(.?)?/\n      nativeReplace.call(match[0], reCopy, function () {\n        for (i = 1; i < arguments.length - 2; i++) {\n          if (arguments[i] === undefined) match[i] = undefined;\n        }\n      });\n    }\n\n    return match;\n  };\n}\n\nmodule.exports = patchedExec;\n","'use strict';\nvar $ = require('../internals/export');\nvar exec = require('../internals/regexp-exec');\n\n$({ target: 'RegExp', proto: true, forced: /./.exec !== exec }, {\n  exec: exec\n});\n","'use strict';\nvar hide = require('../internals/hide');\nvar redefine = require('../internals/redefine');\nvar fails = require('../internals/fails');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\nvar regexpExec = require('../internals/regexp-exec');\n\nvar SPECIES = wellKnownSymbol('species');\n\nvar REPLACE_SUPPORTS_NAMED_GROUPS = !fails(function () {\n  // #replace needs built-in support for named groups.\n  // #match works fine because it just return the exec results, even if it has\n  // a \"grops\" property.\n  var re = /./;\n  re.exec = function () {\n    var result = [];\n    result.groups = { a: '7' };\n    return result;\n  };\n  return ''.replace(re, '$<a>') !== '7';\n});\n\n// Chrome 51 has a buggy \"split\" implementation when RegExp#exec !== nativeExec\n// Weex JS has frozen built-in prototypes, so use try / catch wrapper\nvar SPLIT_WORKS_WITH_OVERWRITTEN_EXEC = !fails(function () {\n  var re = /(?:)/;\n  var originalExec = re.exec;\n  re.exec = function () { return originalExec.apply(this, arguments); };\n  var result = 'ab'.split(re);\n  return result.length !== 2 || result[0] !== 'a' || result[1] !== 'b';\n});\n\nmodule.exports = function (KEY, length, exec, sham) {\n  var SYMBOL = wellKnownSymbol(KEY);\n\n  var DELEGATES_TO_SYMBOL = !fails(function () {\n    // String methods call symbol-named RegEp methods\n    var O = {};\n    O[SYMBOL] = function () { return 7; };\n    return ''[KEY](O) != 7;\n  });\n\n  var DELEGATES_TO_EXEC = DELEGATES_TO_SYMBOL && !fails(function () {\n    // Symbol-named RegExp methods call .exec\n    var execCalled = false;\n    var re = /a/;\n    re.exec = function () { execCalled = true; return null; };\n\n    if (KEY === 'split') {\n      // RegExp[@@split] doesn't call the regex's exec method, but first creates\n      // a new one. We need to return the patched regex when creating the new one.\n      re.constructor = {};\n      re.constructor[SPECIES] = function () { return re; };\n    }\n\n    re[SYMBOL]('');\n    return !execCalled;\n  });\n\n  if (\n    !DELEGATES_TO_SYMBOL ||\n    !DELEGATES_TO_EXEC ||\n    (KEY === 'replace' && !REPLACE_SUPPORTS_NAMED_GROUPS) ||\n    (KEY === 'split' && !SPLIT_WORKS_WITH_OVERWRITTEN_EXEC)\n  ) {\n    var nativeRegExpMethod = /./[SYMBOL];\n    var methods = exec(SYMBOL, ''[KEY], function (nativeMethod, regexp, str, arg2, forceStringMethod) {\n      if (regexp.exec === regexpExec) {\n        if (DELEGATES_TO_SYMBOL && !forceStringMethod) {\n          // The native String method already delegates to @@method (this\n          // polyfilled function), leasing to infinite recursion.\n          // We avoid it by directly calling the native @@method method.\n          return { done: true, value: nativeRegExpMethod.call(regexp, str, arg2) };\n        }\n        return { done: true, value: nativeMethod.call(str, regexp, arg2) };\n      }\n      return { done: false };\n    });\n    var stringMethod = methods[0];\n    var regexMethod = methods[1];\n\n    redefine(String.prototype, KEY, stringMethod);\n    redefine(RegExp.prototype, SYMBOL, length == 2\n      // 21.2.5.8 RegExp.prototype[@@replace](string, replaceValue)\n      // 21.2.5.11 RegExp.prototype[@@split](string, limit)\n      ? function (string, arg) { return regexMethod.call(string, this, arg); }\n      // 21.2.5.6 RegExp.prototype[@@match](string)\n      // 21.2.5.9 RegExp.prototype[@@search](string)\n      : function (string) { return regexMethod.call(string, this); }\n    );\n    if (sham) hide(RegExp.prototype[SYMBOL], 'sham', true);\n  }\n};\n","'use strict';\nvar codePointAt = require('../internals/string-at');\n\n// `AdvanceStringIndex` abstract operation\n// https://tc39.github.io/ecma262/#sec-advancestringindex\nmodule.exports = function (S, index, unicode) {\n  return index + (unicode ? codePointAt(S, index, true).length : 1);\n};\n","var toInteger = require('../internals/to-integer');\nvar requireObjectCoercible = require('../internals/require-object-coercible');\n\n// CONVERT_TO_STRING: true  -> String#at\n// CONVERT_TO_STRING: false -> String#codePointAt\nmodule.exports = function (that, pos, CONVERT_TO_STRING) {\n  var S = String(requireObjectCoercible(that));\n  var position = toInteger(pos);\n  var size = S.length;\n  var first, second;\n  if (position < 0 || position >= size) return CONVERT_TO_STRING ? '' : undefined;\n  first = S.charCodeAt(position);\n  return first < 0xD800 || first > 0xDBFF || position + 1 === size\n    || (second = S.charCodeAt(position + 1)) < 0xDC00 || second > 0xDFFF\n      ? CONVERT_TO_STRING ? S.charAt(position) : first\n      : CONVERT_TO_STRING ? S.slice(position, position + 2) : (first - 0xD800 << 10) + (second - 0xDC00) + 0x10000;\n};\n","var classof = require('./classof-raw');\nvar regexpExec = require('./regexp-exec');\n\n// `RegExpExec` abstract operation\n// https://tc39.github.io/ecma262/#sec-regexpexec\nmodule.exports = function (R, S) {\n  var exec = R.exec;\n  if (typeof exec === 'function') {\n    var result = exec.call(R, S);\n    if (typeof result !== 'object') {\n      throw TypeError('RegExp exec method returned something other than an Object or null');\n    }\n    return result;\n  }\n\n  if (classof(R) !== 'RegExp') {\n    throw TypeError('RegExp#exec called on incompatible receiver');\n  }\n\n  return regexpExec.call(R, S);\n};\n\n","'use strict';\nvar fixRegExpWellKnownSymbolLogic = require('../internals/fix-regexp-well-known-symbol-logic');\nvar anObject = require('../internals/an-object');\nvar toObject = require('../internals/to-object');\nvar toLength = require('../internals/to-length');\nvar toInteger = require('../internals/to-integer');\nvar requireObjectCoercible = require('../internals/require-object-coercible');\nvar advanceStringIndex = require('../internals/advance-string-index');\nvar regExpExec = require('../internals/regexp-exec-abstract');\n\nvar max = Math.max;\nvar min = Math.min;\nvar floor = Math.floor;\nvar SUBSTITUTION_SYMBOLS = /\\$([$&'`]|\\d\\d?|<[^>]*>)/g;\nvar SUBSTITUTION_SYMBOLS_NO_NAMED = /\\$([$&'`]|\\d\\d?)/g;\n\nvar maybeToString = function (it) {\n  return it === undefined ? it : String(it);\n};\n\n// @@replace logic\nfixRegExpWellKnownSymbolLogic('replace', 2, function (REPLACE, nativeReplace, maybeCallNative) {\n  return [\n    // `String.prototype.replace` method\n    // https://tc39.github.io/ecma262/#sec-string.prototype.replace\n    function replace(searchValue, replaceValue) {\n      var O = requireObjectCoercible(this);\n      var replacer = searchValue == undefined ? undefined : searchValue[REPLACE];\n      return replacer !== undefined\n        ? replacer.call(searchValue, O, replaceValue)\n        : nativeReplace.call(String(O), searchValue, replaceValue);\n    },\n    // `RegExp.prototype[@@replace]` method\n    // https://tc39.github.io/ecma262/#sec-regexp.prototype-@@replace\n    function (regexp, replaceValue) {\n      var res = maybeCallNative(nativeReplace, regexp, this, replaceValue);\n      if (res.done) return res.value;\n\n      var rx = anObject(regexp);\n      var S = String(this);\n\n      var functionalReplace = typeof replaceValue === 'function';\n      if (!functionalReplace) replaceValue = String(replaceValue);\n\n      var global = rx.global;\n      if (global) {\n        var fullUnicode = rx.unicode;\n        rx.lastIndex = 0;\n      }\n      var results = [];\n      while (true) {\n        var result = regExpExec(rx, S);\n        if (result === null) break;\n\n        results.push(result);\n        if (!global) break;\n\n        var matchStr = String(result[0]);\n        if (matchStr === '') rx.lastIndex = advanceStringIndex(S, toLength(rx.lastIndex), fullUnicode);\n      }\n\n      var accumulatedResult = '';\n      var nextSourcePosition = 0;\n      for (var i = 0; i < results.length; i++) {\n        result = results[i];\n\n        var matched = String(result[0]);\n        var position = max(min(toInteger(result.index), S.length), 0);\n        var captures = [];\n        // NOTE: This is equivalent to\n        //   captures = result.slice(1).map(maybeToString)\n        // but for some reason `nativeSlice.call(result, 1, result.length)` (called in\n        // the slice polyfill when slicing native arrays) \"doesn't work\" in safari 9 and\n        // causes a crash (https://pastebin.com/N21QzeQA) when trying to debug it.\n        for (var j = 1; j < result.length; j++) captures.push(maybeToString(result[j]));\n        var namedCaptures = result.groups;\n        if (functionalReplace) {\n          var replacerArgs = [matched].concat(captures, position, S);\n          if (namedCaptures !== undefined) replacerArgs.push(namedCaptures);\n          var replacement = String(replaceValue.apply(undefined, replacerArgs));\n        } else {\n          replacement = getSubstitution(matched, S, position, captures, namedCaptures, replaceValue);\n        }\n        if (position >= nextSourcePosition) {\n          accumulatedResult += S.slice(nextSourcePosition, position) + replacement;\n          nextSourcePosition = position + matched.length;\n        }\n      }\n      return accumulatedResult + S.slice(nextSourcePosition);\n    }\n  ];\n\n  // https://tc39.github.io/ecma262/#sec-getsubstitution\n  function getSubstitution(matched, str, position, captures, namedCaptures, replacement) {\n    var tailPos = position + matched.length;\n    var m = captures.length;\n    var symbols = SUBSTITUTION_SYMBOLS_NO_NAMED;\n    if (namedCaptures !== undefined) {\n      namedCaptures = toObject(namedCaptures);\n      symbols = SUBSTITUTION_SYMBOLS;\n    }\n    return nativeReplace.call(replacement, symbols, function (match, ch) {\n      var capture;\n      switch (ch.charAt(0)) {\n        case '$': return '$';\n        case '&': return matched;\n        case '`': return str.slice(0, position);\n        case \"'\": return str.slice(tailPos);\n        case '<':\n          capture = namedCaptures[ch.slice(1, -1)];\n          break;\n        default: // \\d\\d?\n          var n = +ch;\n          if (n === 0) return match;\n          if (n > m) {\n            var f = floor(n / 10);\n            if (f === 0) return match;\n            if (f <= m) return captures[f - 1] === undefined ? ch.charAt(1) : captures[f - 1] + ch.charAt(1);\n            return match;\n          }\n          capture = captures[n - 1];\n      }\n      return capture === undefined ? '' : capture;\n    });\n  }\n});\n","var anObject = require('../internals/an-object');\nvar aFunction = require('../internals/a-function');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\n\nvar SPECIES = wellKnownSymbol('species');\n\n// `SpeciesConstructor` abstract operation\n// https://tc39.github.io/ecma262/#sec-speciesconstructor\nmodule.exports = function (O, defaultConstructor) {\n  var C = anObject(O).constructor;\n  var S;\n  return C === undefined || (S = anObject(C)[SPECIES]) == undefined ? defaultConstructor : aFunction(S);\n};\n","'use strict';\nvar fixRegExpWellKnownSymbolLogic = require('../internals/fix-regexp-well-known-symbol-logic');\nvar isRegExp = require('../internals/is-regexp');\nvar anObject = require('../internals/an-object');\nvar requireObjectCoercible = require('../internals/require-object-coercible');\nvar speciesConstructor = require('../internals/species-constructor');\nvar advanceStringIndex = require('../internals/advance-string-index');\nvar toLength = require('../internals/to-length');\nvar callRegExpExec = require('../internals/regexp-exec-abstract');\nvar regexpExec = require('../internals/regexp-exec');\nvar fails = require('../internals/fails');\n\nvar arrayPush = [].push;\nvar min = Math.min;\nvar MAX_UINT32 = 0xFFFFFFFF;\n\n// babel-minify transpiles RegExp('x', 'y') -> /x/y and it causes SyntaxError\nvar SUPPORTS_Y = !fails(function () { return !RegExp(MAX_UINT32, 'y'); });\n\n// @@split logic\nfixRegExpWellKnownSymbolLogic('split', 2, function (SPLIT, nativeSplit, maybeCallNative) {\n  var internalSplit;\n  if (\n    'abbc'.split(/(b)*/)[1] == 'c' ||\n    'test'.split(/(?:)/, -1).length != 4 ||\n    'ab'.split(/(?:ab)*/).length != 2 ||\n    '.'.split(/(.?)(.?)/).length != 4 ||\n    '.'.split(/()()/).length > 1 ||\n    ''.split(/.?/).length\n  ) {\n    // based on es5-shim implementation, need to rework it\n    internalSplit = function (separator, limit) {\n      var string = String(requireObjectCoercible(this));\n      var lim = limit === undefined ? MAX_UINT32 : limit >>> 0;\n      if (lim === 0) return [];\n      if (separator === undefined) return [string];\n      // If `separator` is not a regex, use native split\n      if (!isRegExp(separator)) {\n        return nativeSplit.call(string, separator, lim);\n      }\n      var output = [];\n      var flags = (separator.ignoreCase ? 'i' : '') +\n                  (separator.multiline ? 'm' : '') +\n                  (separator.unicode ? 'u' : '') +\n                  (separator.sticky ? 'y' : '');\n      var lastLastIndex = 0;\n      // Make `global` and avoid `lastIndex` issues by working with a copy\n      var separatorCopy = new RegExp(separator.source, flags + 'g');\n      var match, lastIndex, lastLength;\n      while (match = regexpExec.call(separatorCopy, string)) {\n        lastIndex = separatorCopy.lastIndex;\n        if (lastIndex > lastLastIndex) {\n          output.push(string.slice(lastLastIndex, match.index));\n          if (match.length > 1 && match.index < string.length) arrayPush.apply(output, match.slice(1));\n          lastLength = match[0].length;\n          lastLastIndex = lastIndex;\n          if (output.length >= lim) break;\n        }\n        if (separatorCopy.lastIndex === match.index) separatorCopy.lastIndex++; // Avoid an infinite loop\n      }\n      if (lastLastIndex === string.length) {\n        if (lastLength || !separatorCopy.test('')) output.push('');\n      } else output.push(string.slice(lastLastIndex));\n      return output.length > lim ? output.slice(0, lim) : output;\n    };\n  // Chakra, V8\n  } else if ('0'.split(undefined, 0).length) {\n    internalSplit = function (separator, limit) {\n      return separator === undefined && limit === 0 ? [] : nativeSplit.call(this, separator, limit);\n    };\n  } else internalSplit = nativeSplit;\n\n  return [\n    // `String.prototype.split` method\n    // https://tc39.github.io/ecma262/#sec-string.prototype.split\n    function split(separator, limit) {\n      var O = requireObjectCoercible(this);\n      var splitter = separator == undefined ? undefined : separator[SPLIT];\n      return splitter !== undefined\n        ? splitter.call(separator, O, limit)\n        : internalSplit.call(String(O), separator, limit);\n    },\n    // `RegExp.prototype[@@split]` method\n    // https://tc39.github.io/ecma262/#sec-regexp.prototype-@@split\n    //\n    // NOTE: This cannot be properly polyfilled in engines that don't support\n    // the 'y' flag.\n    function (regexp, limit) {\n      var res = maybeCallNative(internalSplit, regexp, this, limit, internalSplit !== nativeSplit);\n      if (res.done) return res.value;\n\n      var rx = anObject(regexp);\n      var S = String(this);\n      var C = speciesConstructor(rx, RegExp);\n\n      var unicodeMatching = rx.unicode;\n      var flags = (rx.ignoreCase ? 'i' : '') +\n                  (rx.multiline ? 'm' : '') +\n                  (rx.unicode ? 'u' : '') +\n                  (SUPPORTS_Y ? 'y' : 'g');\n\n      // ^(? + rx + ) is needed, in combination with some S slicing, to\n      // simulate the 'y' flag.\n      var splitter = new C(SUPPORTS_Y ? rx : '^(?:' + rx.source + ')', flags);\n      var lim = limit === undefined ? MAX_UINT32 : limit >>> 0;\n      if (lim === 0) return [];\n      if (S.length === 0) return callRegExpExec(splitter, S) === null ? [S] : [];\n      var p = 0;\n      var q = 0;\n      var A = [];\n      while (q < S.length) {\n        splitter.lastIndex = SUPPORTS_Y ? q : 0;\n        var z = callRegExpExec(splitter, SUPPORTS_Y ? S : S.slice(q));\n        var e;\n        if (\n          z === null ||\n          (e = min(toLength(splitter.lastIndex + (SUPPORTS_Y ? 0 : q)), S.length)) === p\n        ) {\n          q = advanceStringIndex(S, q, unicodeMatching);\n        } else {\n          A.push(S.slice(p, q));\n          if (A.length === lim) return A;\n          for (var i = 1; i <= z.length - 1; i++) {\n            A.push(z[i]);\n            if (A.length === lim) return A;\n          }\n          q = p = e;\n        }\n      }\n      A.push(S.slice(p));\n      return A;\n    }\n  ];\n}, !SUPPORTS_Y);\n","var fails = require('../internals/fails');\nvar whitespaces = require('../internals/whitespaces');\n\nvar non = '\\u200B\\u0085\\u180E';\n\n// check that a method works with the correct list\n// of whitespaces and has a correct name\nmodule.exports = function (METHOD_NAME) {\n  return fails(function () {\n    return !!whitespaces[METHOD_NAME]() || non[METHOD_NAME]() != non || whitespaces[METHOD_NAME].name !== METHOD_NAME;\n  });\n};\n","'use strict';\nvar $ = require('../internals/export');\nvar internalStringTrim = require('../internals/string-trim');\nvar forcedStringTrimMethod = require('../internals/forced-string-trim-method');\n\nvar FORCED = forcedStringTrimMethod('trim');\n\n// `String.prototype.trim` method\n// https://tc39.github.io/ecma262/#sec-string.prototype.trim\n$({ target: 'String', proto: true, forced: FORCED }, {\n  trim: function trim() {\n    return internalStringTrim(this, 3);\n  }\n});\n","\n/**\n * Round at decimals\n * @private\n * @param {number} number - any number to round\n * @param {number} decimals - number of decimals to round at\n */\nconst roundAt = function (number, decimals) {\n\t// https://www.jacklmoore.com/notes/rounding-in-javascript/\n\treturn Number ( Math.round ( number + 'e' + decimals ) + 'e-' + decimals );\n};\n\n/**\n * Process comma seperated list to a sanitised array with normalised strings\n * @private\n * @param {string} commaSeperatedList\n * @returns {array} array with strings\n */\nconst commaSeperatedListToArray = function ( commaSeperatedList ) {\n\tlet list = commaSeperatedList.split(',');\n\tlet trimmed = list.map ( item => item.trim().replace(/\\s+/g, ' ') );\n\treturn trimmed.filter ( item => {\n\t\treturn item.length;\n\t});\n};\n\n/**\n * Convert a static nodeList to an array to be able to perform array operations like filter or map\n * @private\n * @param {nodeList} nodeList\n * @returns {array} array with HTMLElements\n */\nconst queryToArray = function ( query ) {\n\t// the push.apply operation is in most browsers among the fastest\n\t// https://jsperf.com/nodelist-to-array/27\n\tvar elementArray = [];\n\telementArray.push.apply(elementArray, document.querySelectorAll ( query ) );\n\treturn elementArray;\n};\n\nexport {\n\tcommaSeperatedListToArray,\n\tqueryToArray,\n\troundAt\n};\n","\nimport {\n\tcommaSeperatedListToArray,\n\tqueryToArray,\n\troundAt\n} from './utilities';\n\nlet onScreennessModule = (function () {\n\tvar queryList = [];\n\tvar blackList = [];\n\n\t/**\n\t * Remove datasets and classNames from queried elements\n\t * @private\n\t * @param {string} removeList - querySelector\n\t */\n\tvar detachIdentifiers = function ( removeList ) {\n\t\tvar elementList = removeList.length \n\t\t\t? queryToArray ( removeList.join(',') )\n\t\t\t: [];\n\n\t\telementList.forEach( function ( element ) {\n\t\t\tif ( !element ) {\n\t\t\t\t// the elements could be deleted\n\t\t\t\treturn;\n\t\t\t}\n\t\t\telement.classList.remove('onscreen');\n\t\t\telement.classList.remove('offscreen');\n\t\t\telement.classList.remove('crossscreen');\n\t\t\telement.classList.remove('overscreen');\n\t\t\tdelete element.dataset['onscreenness'];\n\t\t\tdelete element.dataset['overlapping'];\n\t\t});\n\t};\n\n\t/**\n\t * Add solitary queries to a list, avoiding duplication\n\t * @private\n\t * @param {string} currentList - list with unique solitary queries\n\t * @param {string} newQueries - querySelector\n\t */\n\tvar addQueries = function ( currentList, newQueries ) {\n\t\tnewQueries.forEach ( ( newQuery ) => {\n\t\t\tif ( !currentList.includes ( newQuery ) ) {\n\t\t\t\tcurrentList.push ( newQuery );\n\t\t\t}\n\t\t});\n\t};\n\n\t/**\n\t * Add query to queryList\n\t * @param {string} rawQuery - querySelector\n\t */\n\tvar collect = function ( rawQuery ) {\n\t\tvar queries = commaSeperatedListToArray ( rawQuery );\n\t\taddQueries ( queryList, queries );\n\t};\n\n\t/**\n\t * Add to blacklist\n\t * @param {string} rawQuery - querySelector\n\t */\n\tvar exclude = function ( rawQuery ) {\n\t\tvar queries = commaSeperatedListToArray ( rawQuery );\n\t\tdetachIdentifiers ( queries );\n\t\taddQueries ( blackList, queries );\n\t};\n\n\t/**\n\t * Remove query from queryList and blacklist\n\t * @param {string} rawQuery - querySelector\n\t */\n\tvar remove = function ( rawQuery ) {\n\t\tvar queries = commaSeperatedListToArray ( rawQuery );\n\t\tqueries.forEach ( ( query ) => {\n\t\t\tif ( queryList.includes ( query ) ) {\n\t\t\t\tdetachIdentifiers ( [query] );\n\t\t\t\tqueryList.splice ( queryList.indexOf ( query ), 1 );\n\t\t\t}\n\t\t});\n\t};\n\n\t/**\n\t * Empty the querylist\n\t */\n\tvar reset = function () {\n\t\tdetachIdentifiers ( queryList );\n\t\tqueryList = [];\n\t\tblackList = [];\n\t};\n\n\t/**\n\t * Calculate onscreenness figures of an element\n\t * @private\n\t * @param {object} boundingRect\n\t * @returns {object} onscreenness figures\n\t */\n\tvar calculatePresence = function ( boundingRect ) {\n\t\tvar overhang = {\n\t\t\tleft: 0 - boundingRect.left,\n\t\t\tright: boundingRect.right - document.documentElement.clientWidth,\n\t\t\ttop: 0 - boundingRect.top,\n\t\t\tbottom: boundingRect.bottom - document.documentElement.clientHeight,\n\t\t};\n\t\tvar absence = {\n\t\t\tleft: Math.min( Math.max( overhang.left, 0 ), boundingRect.width ),\n\t\t\tright: Math.min( Math.max( overhang.right, 0 ), boundingRect.width ),\n\t\t\ttop: Math.min( Math.max( overhang.top, 0 ), boundingRect.height ),\n\t\t\tbottom: Math.min( Math.max( overhang.bottom, 0 ), boundingRect.height ),\n\t\t};\n\t\tvar relativeAbsence = {\n\t\t\tleft: absence.left / boundingRect.width,\n\t\t\tright: absence.right / boundingRect.width,\n\t\t\ttop: absence.top / boundingRect.height,\n\t\t\tbottom: absence.bottom / boundingRect.height,\n\t\t};\n\n\t\tvar horizonPresence = 1 - relativeAbsence.left - relativeAbsence.right;\n\t\tvar verticaPresence = 1 - relativeAbsence.top - relativeAbsence.bottom;\n\n\t\tvar horizonOverlap = (\n\t\t\tboundingRect.width - absence.left - absence.right\n\t\t\t) / document.documentElement.clientWidth;\n\t\tvar verticaOverlap = (\n\t\t\tboundingRect.height - absence.top - absence.bottom\n\t\t\t) / document.documentElement.clientHeight;\n\n\t\treturn {\n\t\t\thorizonOverlap: horizonOverlap,\n\t\t\tverticaOverlap: verticaOverlap,\n\t\t\tsurfaceOverlap: horizonOverlap * verticaOverlap,\n\t\t\thorizonPresence: horizonPresence,\n\t\t\tverticaPresence: verticaPresence,\n\t\t\tsurfacePresence: horizonPresence * verticaPresence,\n\t\t};\n\t};\n\n\t/** \n\t * Updates dataset and classNames of an element\n\t * @private\n\t * @param {element} element\n\t * @param {object} pp - presence properties\n\t */\n\tvar attachIdentifiers = function ( element, pp ) {\n//\t\tconsole.log('presence properties ' + JSON.stringify(pp));\n\t\tvar presence = roundAt ( pp.surfacePresence, 3 );\n\t\telement.dataset['onscreenness'] = String ( presence );\n\n\t\tvar taggedOn = element.classList.contains('onscreen');\n\t\tif ( presence === 1 && !taggedOn ) {\n\t\t\telement.classList.add('onscreen');\n\t\t}\n\t\tif ( presence < 1 && taggedOn ) {\n\t\t\telement.classList.remove('onscreen');\n\t\t}\n\n\t\tvar taggedCross = element.classList.contains('crossscreen');\n\t\tif ( presence > 0 && presence < 1 && !taggedCross ) {\n\t\t\telement.classList.add('crossscreen');\n\t\t}\n\t\tif ( ( presence === 0 || presence === 1 ) && taggedCross ) {\n\t\t\telement.classList.remove('crossscreen');\n\t\t}\n\n\t\tvar taggedOff = element.classList.contains('offscreen');\n\t\tif ( presence === 0 && !taggedOff ) {\n\t\t\telement.classList.add('offscreen');\n\t\t}\n\t\tif ( presence > 0 && taggedOff ) {\n\t\t\telement.classList.remove('offscreen');\n\t\t}\n\n\t\tvar overlapping = roundAt ( pp.surfaceOverlap, 3 );\n\t\telement.dataset['overlapping'] = String ( overlapping );\n\n\t\tvar overhanging = (\n\t\t\t(pp.verticaOverlap === 1 && pp.horizonOverlap === 1) ||\n\t\t\t(pp.verticaOverlap === 1 && pp.horizonPresence === 1) ||\n\t\t\t(pp.horizonOverlap === 1 && pp.verticaPresence === 1)\n\t\t);\n\t\tvar taggedOver = element.classList.contains('overscreen');\n\t\tif ( overhanging && !taggedOver ) {\n\t\t\telement.classList.add('overscreen');\n\t\t}\n\t\tif ( !overhanging && taggedOver ) {\n\t\t\telement.classList.remove('overscreen');\n\t\t}\n\t};\n\n\t/** \n\t * Live list of elements to work on\n\t * @private\n\t */\n\tvar composeJobList = function () {\n\t\tvar elementList = queryList.length \n\t\t\t? queryToArray ( queryList.join(',') )\n\t\t\t: [];\n\t\tvar ignoreList = blackList.length \n\t\t\t? queryToArray ( blackList.join(',') )\n\t\t\t: [];\n\n\t\tif ( elementList.length ) {\n\t\t\treturn elementList.filter ( elm => !ignoreList.includes ( elm ) );\n\t\t} else {\n\t\t\treturn [];\n\t\t}\n\t};\n\n\t/** \n\t * Loops all elements from the jobList\n\t * @private\n\t */\n\tvar changeHandler = function () {\n\t\tcomposeJobList().forEach ( function ( element ) {\n\t\t\tvar boundingRect = element.getBoundingClientRect();\n\t\t\tvar props = calculatePresence ( boundingRect );\n\t\t\tattachIdentifiers ( element, props );\n\t\t});\n\t};\n\n\tdocument.addEventListener('readystatechange', function () {\n\t\tif ( document.readyState === 'interactive' ) {\n\t\t\tchangeHandler();\n\t\t}\n\t}, false);\n\twindow.addEventListener('resize', changeHandler, false);\n\twindow.addEventListener('scroll', changeHandler, true);\n\tlet DOMObserver = new MutationObserver( function ( mutationsList, observer ) {\n\t\tif ( mutationsList.length ) {\n\t\t\tchangeHandler();\n\t\t}\n\t});\n\twindow.addEventListener('load', function () {\n\t\tDOMObserver.observe( document.body, { childList: true, subtree: true } );\n\t}, true);\n\n\treturn {\n\t\tpublicAPI: {\n\t\t\tcollect: collect,\n\t\t\texclude: exclude,\n\t\t\tremove: remove,\n\t\t\treset: reset\n\t\t},\n\t\ttestSuite: {\n\t\t\t/**\n\t\t\t * Current variables, for testing purposes\n\t\t\t * @private\n\t\t\t * @returns {object} current variables\n\t\t\t */\n\t\t\tgetVariables: function () {\n\t\t\t\treturn {\n\t\t\t\t\tqueryList: queryList,\n\t\t\t\t\tblackList: blackList\n\t\t\t\t};\n\t\t\t},\n\t\t\ttriggerEvent: changeHandler,\n\t\t\tmakeNodeList: composeJobList,\n\t\t\tcalculatePresence: calculatePresence,\n\t\t\ttreatElement: attachIdentifiers,\n\t\t\tcleanElements: detachIdentifiers\n\t\t}\n\t}\n})();\n\nlet onScreenness = onScreennessModule.publicAPI;\nlet onScreenTest = onScreennessModule.testSuite;\n\nexport { onScreenness, onScreenTest 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element.dataset['onscreenness'];\n\t\t\tdelete element.dataset['overlapping'];\n\t\t});\n\t};\n\n\t/**\n\t * Add solitary queries to a list, avoiding duplication\n\t * @private\n\t * @param {string} currentList - list with unique solitary queries\n\t * @param {string} newQueries - querySelector\n\t */\n\tvar addQueries = function ( currentList, newQueries ) {\n\t\tnewQueries.forEach ( ( newQuery ) => {\n\t\t\tif ( !currentList.includes ( newQuery ) ) {\n\t\t\t\tcurrentList.push ( newQuery );\n\t\t\t}\n\t\t});\n\t};\n\n\t/**\n\t * Add query to queryList\n\t * @param {string} rawQuery - querySelector\n\t */\n\tvar collect = function ( rawQuery ) {\n\t\tvar queries = commaSeperatedListToArray ( rawQuery );\n\t\taddQueries ( queryList, queries );\n\t};\n\n\t/**\n\t * Add to blacklist\n\t * @param {string} rawQuery - querySelector\n\t */\n\tvar exclude = function ( rawQuery ) {\n\t\tvar queries = commaSeperatedListToArray ( rawQuery );\n\t\tdetachIdentifiers ( queries );\n\t\taddQueries ( blackList, queries );\n\t};\n\n\t/**\n\t * Remove query from queryList and blacklist\n\t * @param {string} rawQuery - querySelector\n\t */\n\tvar remove = function ( rawQuery ) {\n\t\tvar queries = commaSeperatedListToArray ( rawQuery );\n\t\tqueries.forEach ( ( query ) => {\n\t\t\tif ( queryList.includes ( query ) ) {\n\t\t\t\tdetachIdentifiers ( [query] );\n\t\t\t\tqueryList.splice ( queryList.indexOf ( query ), 1 );\n\t\t\t}\n\t\t});\n\t};\n\n\t/**\n\t * Empty the querylist\n\t */\n\tvar reset = function () {\n\t\tdetachIdentifiers ( queryList );\n\t\tqueryList = [];\n\t\tblackList = [];\n\t};\n\n\t/**\n\t * Calculate onscreenness figures of an element\n\t * @private\n\t * @param {object} boundingRect\n\t * @returns {object} onscreenness figures\n\t */\n\tvar calculatePresence = function ( boundingRect ) {\n\t\tvar overhang = {\n\t\t\tleft: 0 - boundingRect.left,\n\t\t\tright: boundingRect.right - document.documentElement.clientWidth,\n\t\t\ttop: 0 - boundingRect.top,\n\t\t\tbottom: boundingRect.bottom - document.documentElement.clientHeight,\n\t\t};\n\t\tvar absence = {\n\t\t\tleft: Math.min( Math.max( overhang.left, 0 ), boundingRect.width ),\n\t\t\tright: Math.min( Math.max( overhang.right, 0 ), boundingRect.width ),\n\t\t\ttop: Math.min( Math.max( overhang.top, 0 ), boundingRect.height ),\n\t\t\tbottom: Math.min( Math.max( overhang.bottom, 0 ), boundingRect.height ),\n\t\t};\n\t\tvar relativeAbsence = {\n\t\t\tleft: absence.left / boundingRect.width,\n\t\t\tright: absence.right / boundingRect.width,\n\t\t\ttop: absence.top / boundingRect.height,\n\t\t\tbottom: absence.bottom / boundingRect.height,\n\t\t};\n\n\t\tvar horizonPresence = 1 - relativeAbsence.left - relativeAbsence.right;\n\t\tvar verticaPresence = 1 - relativeAbsence.top - relativeAbsence.bottom;\n\n\t\tvar horizonOverlap = (\n\t\t\tboundingRect.width - absence.left - absence.right\n\t\t\t) / document.documentElement.clientWidth;\n\t\tvar verticaOverlap = (\n\t\t\tboundingRect.height - absence.top - absence.bottom\n\t\t\t) / document.documentElement.clientHeight;\n\n\t\treturn {\n\t\t\thorizonOverlap: horizonOverlap,\n\t\t\tverticaOverlap: verticaOverlap,\n\t\t\tsurfaceOverlap: horizonOverlap * verticaOverlap,\n\t\t\thorizonPresence: horizonPresence,\n\t\t\tverticaPresence: verticaPresence,\n\t\t\tsurfacePresence: horizonPresence * verticaPresence,\n\t\t};\n\t};\n\n\t/** \n\t * Updates dataset and classNames of an element\n\t * @private\n\t * @param {element} element\n\t * @param {object} pp - presence properties\n\t */\n\tvar attachIdentifiers = function ( element, pp ) {\n//\t\tconsole.log('presence properties ' + JSON.stringify(pp));\n\t\tvar presence = roundAt ( pp.surfacePresence, 3 );\n\t\telement.dataset['onscreenness'] = String ( presence );\n\n\t\tvar taggedOn = element.classList.contains('onscreen');\n\t\tif ( presence === 1 && !taggedOn ) {\n\t\t\telement.classList.add('onscreen');\n\t\t}\n\t\tif ( presence < 1 && taggedOn ) {\n\t\t\telement.classList.remove('onscreen');\n\t\t}\n\n\t\tvar taggedCross = element.classList.contains('crossscreen');\n\t\tif ( presence > 0 && presence < 1 && !taggedCross ) {\n\t\t\telement.classList.add('crossscreen');\n\t\t}\n\t\tif ( ( presence === 0 || presence === 1 ) && taggedCross ) {\n\t\t\telement.classList.remove('crossscreen');\n\t\t}\n\n\t\tvar taggedOff = element.classList.contains('offscreen');\n\t\tif ( presence === 0 && !taggedOff ) {\n\t\t\telement.classList.add('offscreen');\n\t\t}\n\t\tif ( presence > 0 && taggedOff ) {\n\t\t\telement.classList.remove('offscreen');\n\t\t}\n\n\t\tvar overlapping = roundAt ( pp.surfaceOverlap, 3 );\n\t\telement.dataset['overlapping'] = String ( overlapping );\n\n\t\tvar overhanging = (\n\t\t\t(pp.verticaOverlap === 1 && pp.horizonOverlap === 1) ||\n\t\t\t(pp.verticaOverlap === 1 && pp.horizonPresence === 1) ||\n\t\t\t(pp.horizonOverlap === 1 && pp.verticaPresence === 1)\n\t\t);\n\t\tvar taggedOver = element.classList.contains('overscreen');\n\t\tif ( overhanging && !taggedOver ) {\n\t\t\telement.classList.add('overscreen');\n\t\t}\n\t\tif ( !overhanging && taggedOver ) {\n\t\t\telement.classList.remove('overscreen');\n\t\t}\n\t};\n\n\t/** \n\t * Live list of elements to work on\n\t * @private\n\t */\n\tvar composeJobList = function () {\n\t\tvar fullList = [baseQuery].concat(queryList);\n\t\tvar elementList = queryToArray ( fullList.join(',') );\n\t\tvar ignoreList = blackList.length \n\t\t\t? queryToArray ( blackList.join(',') )\n\t\t\t: [];\n\n\t\treturn elementList.filter ( elm => !ignoreList.includes ( elm ) );\n\t};\n\n\t/** \n\t * Loops all elements from the jobList\n\t * @private\n\t */\n\tvar changeHandler = function () {\n\t\tcomposeJobList().forEach ( function ( element ) {\n\t\t\tvar boundingRect = element.getBoundingClientRect();\n\t\t\tvar props = calculatePresence ( boundingRect );\n\t\t\tattachIdentifiers ( element, props 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\ No newline at end of file
diff --git a/jest.config.js b/jest.config.js
index bf7b785..36b8409 100644
--- a/jest.config.js
+++ b/jest.config.js
@@ -10,7 +10,10 @@ module.exports = {
   "preset": "jest-puppeteer",
 
   "setupFiles": [
-    "<rootDir>test/_setupFiles.js"
+    "<rootDir>/test/_setupFiles.js"
   ],
 
+  "transformIgnorePatterns": [
+    "node_modules/(?!(document-staging)/)",
+  ],
 };
diff --git a/package-lock.json b/package-lock.json
index 4ed6f68..6ebb0b0 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -2658,6 +2658,11 @@
         "esutils": "^2.0.2"
       }
     },
+    "document-staging": {
+      "version": "0.2.0",
+      "resolved": "https://registry.npmjs.org/document-staging/-/document-staging-0.2.0.tgz",
+      "integrity": "sha512-BtzxNoufTdBnLGitDl5CLRfMQgO1i5Bvc3IogrDhRCAQfyVGj/iyibkx1ZV7d4hEcK+5gmWa6tIE7z4tQsW2Kw=="
+    },
     "documentation": {
       "version": "11.0.1",
       "resolved": "https://registry.npmjs.org/documentation/-/documentation-11.0.1.tgz",
diff --git a/package.json b/package.json
index 2fb2869..4b2232b 100644
--- a/package.json
+++ b/package.json
@@ -3,12 +3,13 @@
   "version": "1.3.0",
   "description": "Supply visibility classes and data to selected elements on your webpage.",
   "main": "dist/index.js",
+  "module": "dist/index.esm.js",
   "scripts": {
     "build:src": "clear-folder dist && rollup --config",
     "build:docs": "documentation build src/*.js --format md > API.md",
     "build": "npm run build:src && npm run build:docs",
     "start": "rollup --config --watch",
-    "serve": "node ./lib/start-server.js --open",
+    "serve": "node ./lib/start-server.js",
     "coverage": "clear-folder .nyc_output coverage test/screenshots && jest --coverage",
     "test": "clear-folder test/screenshots && jest"
   },
@@ -29,7 +30,9 @@
   ],
   "author": "Onno van der Zee",
   "license": "ISC",
-  "dependencies": {},
+  "dependencies": {
+    "document-staging": "^0.2.0"
+  },
   "devDependencies": {
     "@babel/core": "^7.4.4",
     "@babel/plugin-transform-runtime": "^7.4.4",
diff --git a/rollup.config.js b/rollup.config.js
index 0349693..ffc250b 100644
--- a/rollup.config.js
+++ b/rollup.config.js
@@ -8,19 +8,28 @@ const name = "onScreenness";
 
 export default {
   input: 'src/index.js',
-  output: {
+  output: [{
     file: 'dist/index.js',
     format: 'umd',
     name: name,
     sourcemap: true,
-  },
+  }, {
+    file: 'dist/index.esm.js',
+    format: 'esm',
+    name: name,
+    sourcemap: true,
+  }],
   plugins: [
     resolve(),
     babel({
       exclude: 'node_modules/**',
+      include: 'node_modules/document-staging',
       runtimeHelpers: true
     }),
-    commonjs(),
+    commonjs({
+      // to read umd dependencies
+      include: 'node_modules/**',
+    }),
     terser(),
   ]
 };
diff --git a/src/onScreenness.js b/src/onScreenness.js
index 996bd09..3355d97 100644
--- a/src/onScreenness.js
+++ b/src/onScreenness.js
@@ -3,8 +3,10 @@ import {
 	queryToArray,
 	roundAt
 } from './utilities.js';
+import documentStaging from '../node_modules/document-staging/dist/index.esm.js';
 
 let onScreennessModule = (function () {
+	var baseQuery = '[data-onscreenness]';
 	var queryList = [];
 	var blackList = [];
 
@@ -191,18 +193,13 @@ let onScreennessModule = (function () {
 	 * @private
 	 */
 	var composeJobList = function () {
-		var elementList = queryList.length 
-			? queryToArray ( queryList.join(',') )
-			: [];
+		var fullList = [baseQuery].concat(queryList);
+		var elementList = queryToArray ( fullList.join(',') );
 		var ignoreList = blackList.length 
 			? queryToArray ( blackList.join(',') )
 			: [];
 
-		if ( elementList.length ) {
-			return elementList.filter ( elm => !ignoreList.includes ( elm ) );
-		} else {
-			return [];
-		}
+		return elementList.filter ( elm => !ignoreList.includes ( elm ) );
 	};
 
 	/** 
@@ -217,11 +214,6 @@ let onScreennessModule = (function () {
 		});
 	};
 
-	document.addEventListener('readystatechange', function () {
-		if ( document.readyState === 'interactive' ) {
-			changeHandler();
-		}
-	}, false);
 	window.addEventListener('resize', changeHandler, false);
 	window.addEventListener('scroll', changeHandler, true);
 	let DOMObserver = new MutationObserver( function ( mutationsList, observer ) {
@@ -229,9 +221,12 @@ let onScreennessModule = (function () {
 			changeHandler();
 		}
 	});
-	window.addEventListener('load', function () {
-		DOMObserver.observe( document.body, { childList: true, subtree: true } );
-	}, true);
+	documentStaging.onInteractive([
+		changeHandler,
+		function () {
+			DOMObserver.observe( document.body, { childList: true, subtree: true } );
+		},
+	]);
 
 	return {
 		publicAPI: {
diff --git a/test/basic.html b/test/basic.html
index 2c026b7..4a74965 100644
--- a/test/basic.html
+++ b/test/basic.html
@@ -104,7 +104,7 @@ <h2>Basic Example <span>test</span></h2>
 			<div id="first" class="example">Basic Example Element</div>
 			<div id="second" class="example">Basic Example Element</div>
 			<div id="third" class="example">Basic Example Element</div>
-			<div id="fourth" class="example">Basic Example Element</div>
+			<div id="fourth" class="example" data-onscreenness>Data attribute Example Element</div>
 			<div id="fifth" class="example">Basic Example Element</div>
 			<div id="sixth" class="example">Basic Example Element</div>
 			<div id="seventh" class="example">Basic Example Element</div>
diff --git a/test/unit/auto-asses.test.js b/test/unit/auto-asses.test.js
new file mode 100644
index 0000000..6e5ec00
--- /dev/null
+++ b/test/unit/auto-asses.test.js
@@ -0,0 +1,101 @@
+/**
+ * @jest-environment jsdom
+ */
+
+import {
+  onScreenness,
+  onScreenTest
+} from '../../src/onScreenness.js';
+
+
+describe('An element with an onscreenness data attribute in the html will be in the assesment', function () {
+
+  let trigger;
+  let liveList;
+
+  beforeAll(() => {
+    trigger = onScreenTest.triggerEvent;
+    liveList = onScreenTest.makeNodeList;
+  });
+
+  beforeEach(() => {
+    onScreenness.reset();
+  });
+
+
+  /* Test creation of live nodeLists */
+
+  test('A reset situation without onscreenness data attributes', () => {
+    document.body.innerHTML = `
+        <h2>Basic Example</h2>
+        <section>
+			<div id="first" class="example">Basic Example Element</div>
+			<div id="second" class="example">Basic Example Element</div>
+			<div id="third" class="example">Basic Example Element</div>
+			<div id="fourth" class="example">Basic Example Element</div>
+			<div id="fifth" class="example">Basic Example Element</div>
+			<div id="sixth" class="example">Basic Example Element</div>
+			<div id="seventh" class="example">Basic Example Element</div>
+			<div id="eighth" class="example">Basic Example Element</div>
+        </section>
+    `;
+    let nodes = liveList();
+    expect(nodes.length).toBe(0);
+  });
+
+  test('A reset situation with one onscreenness data attributes', () => {
+    document.body.innerHTML = `
+        <h2>Basic Example</h2>
+        <section>
+			<div id="first" class="example">Basic Example Element</div>
+			<div id="second" class="example">Basic Example Element</div>
+			<div id="third" class="example">Basic Example Element</div>
+			<div id="fourth" class="example" data-onscreenness>Example Element with data-onscreenness attribute</div>
+			<div id="fifth" class="example">Basic Example Element</div>
+			<div id="sixth" class="example">Basic Example Element</div>
+			<div id="seventh" class="example">Basic Example Element</div>
+			<div id="eighth" class="example">Basic Example Element</div>
+        </section>
+    `;
+    let nodes = liveList();
+    expect(nodes.length).toBe(1);
+  });
+
+  test('A reset situation with three onscreenness data attributes', () => {
+    document.body.innerHTML = `
+        <h2>Basic Example</h2>
+        <section>
+			<div id="first" class="example" data-onscreenness>Example Element with data-onscreenness attribute</div>
+			<div id="second" class="example">Basic Example Element</div>
+			<div id="third" class="example">Basic Example Element</div>
+			<div id="fourth" class="example" data-onscreenness>Example Element with data-onscreenness attribute</div>
+			<div id="fifth" class="example">Basic Example Element</div>
+			<div id="sixth" class="example">Basic Example Element</div>
+			<div id="seventh" class="example" data-onscreenness>Example Element with data-onscreenness attribute</div>
+			<div id="eighth" class="example">Basic Example Element</div>
+        </section>
+    `;
+    let nodes = liveList();
+    expect(nodes.length).toBe(3);
+  });
+
+  test('A reset situation with three onscreenness data attributes, of which one excluded', () => {
+    document.body.innerHTML = `
+        <h2>Basic Example</h2>
+        <section>
+			<div id="first" class="example" data-onscreenness>Example Element with data-onscreenness attribute</div>
+			<div id="second" class="example">Basic Example Element</div>
+			<div id="third" class="example">Basic Example Element</div>
+			<div id="fourth" class="example" data-onscreenness>Example Element with data-onscreenness attribute</div>
+			<div id="fifth" class="example">Basic Example Element</div>
+			<div id="sixth" class="example">Basic Example Element</div>
+			<div id="seventh" class="example" data-onscreenness>Example Element with data-onscreenness attribute</div>
+			<div id="eighth" class="example">Basic Example Element</div>
+        </section>
+    `;
+    onScreenness.exclude('#fourth')
+    let nodes = liveList();
+    expect(nodes.length).toBe(2);
+  });
+
+});