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Older browsers don't support event options, feature detect it.\n\n// Adopted and modified solution from Bohdan Didukh (2017)\n// https://stackoverflow.com/questions/41594997/ios-10-safari-prevent-scrolling-behind-a-fixed-overlay-and-maintain-scroll-posi\n\nlet hasPassiveEvents = false;\nif (typeof window !== 'undefined') {\n  const passiveTestOptions = {\n    get passive() {\n      hasPassiveEvents = true;\n      return undefined;\n    }\n  };\n  window.addEventListener('testPassive', null, passiveTestOptions);\n  window.removeEventListener('testPassive', null, passiveTestOptions);\n}\n\nconst isIosDevice = typeof window !== 'undefined' && window.navigator && window.navigator.platform && (/iP(ad|hone|od)/.test(window.navigator.platform) || window.navigator.platform === 'MacIntel' && window.navigator.maxTouchPoints > 1);\n\n\nlet locks = [];\nlet documentListenerAdded = false;\nlet initialClientY = -1;\nlet previousBodyOverflowSetting;\nlet previousBodyPaddingRight;\n\n// returns true if `el` should be allowed to receive touchmove events.\nconst allowTouchMove = el => locks.some(lock => {\n  if (lock.options.allowTouchMove && lock.options.allowTouchMove(el)) {\n    return true;\n  }\n\n  return false;\n});\n\nconst preventDefault = rawEvent => {\n  const e = rawEvent || window.event;\n\n  // For the case whereby consumers adds a touchmove event listener to document.\n  // Recall that we do document.addEventListener('touchmove', preventDefault, { passive: false })\n  // in disableBodyScroll - so if we provide this opportunity to allowTouchMove, then\n  // the touchmove event on document will break.\n  if (allowTouchMove(e.target)) {\n    return true;\n  }\n\n  // Do not prevent if the event has more than one touch (usually meaning this is a multi touch gesture like pinch to zoom).\n  if (e.touches.length > 1) return true;\n\n  if (e.preventDefault) e.preventDefault();\n\n  return false;\n};\n\nconst setOverflowHidden = options => {\n  // Setting overflow on body/documentElement synchronously in Desktop Safari slows down\n  // the responsiveness for some reason. Setting within a setTimeout fixes this.\n  setTimeout(() => {\n    // If previousBodyPaddingRight is already set, don't set it again.\n    if (previousBodyPaddingRight === undefined) {\n      const reserveScrollBarGap = !!options && options.reserveScrollBarGap === true;\n      const scrollBarGap = window.innerWidth - document.documentElement.clientWidth;\n\n      if (reserveScrollBarGap && scrollBarGap > 0) {\n        previousBodyPaddingRight = document.body.style.paddingRight;\n        document.body.style.paddingRight = `${scrollBarGap}px`;\n      }\n    }\n\n    // If previousBodyOverflowSetting is already set, don't set it again.\n    if (previousBodyOverflowSetting === undefined) {\n      previousBodyOverflowSetting = document.body.style.overflow;\n      document.body.style.overflow = 'hidden';\n    }\n  });\n};\n\nconst restoreOverflowSetting = () => {\n  // Setting overflow on body/documentElement synchronously in Desktop Safari slows down\n  // the responsiveness for some reason. Setting within a setTimeout fixes this.\n  setTimeout(() => {\n    if (previousBodyPaddingRight !== undefined) {\n      document.body.style.paddingRight = previousBodyPaddingRight;\n\n      // Restore previousBodyPaddingRight to undefined so setOverflowHidden knows it\n      // can be set again.\n      previousBodyPaddingRight = undefined;\n    }\n\n    if (previousBodyOverflowSetting !== undefined) {\n      document.body.style.overflow = previousBodyOverflowSetting;\n\n      // Restore previousBodyOverflowSetting to undefined\n      // so setOverflowHidden knows it can be set again.\n      previousBodyOverflowSetting = undefined;\n    }\n  });\n};\n\n// https://developer.mozilla.org/en-US/docs/Web/API/Element/scrollHeight#Problems_and_solutions\nconst isTargetElementTotallyScrolled = targetElement => targetElement ? targetElement.scrollHeight - targetElement.scrollTop <= targetElement.clientHeight : false;\n\nconst handleScroll = (event, targetElement) => {\n  const clientY = event.targetTouches[0].clientY - initialClientY;\n\n  if (allowTouchMove(event.target)) {\n    return false;\n  }\n\n  if (targetElement && targetElement.scrollTop === 0 && clientY > 0) {\n    // element is at the top of its scroll.\n    return preventDefault(event);\n  }\n\n  if (isTargetElementTotallyScrolled(targetElement) && clientY < 0) {\n    // element is at the bottom of its scroll.\n    return preventDefault(event);\n  }\n\n  event.stopPropagation();\n  return true;\n};\n\nexport const disableBodyScroll = (targetElement, options) => {\n  if (isIosDevice) {\n    // targetElement must be provided, and disableBodyScroll must not have been\n    // called on this targetElement before.\n    if (!targetElement) {\n      // eslint-disable-next-line no-console\n      console.error('disableBodyScroll unsuccessful - targetElement must be provided when calling disableBodyScroll on IOS devices.');\n      return;\n    }\n\n    if (targetElement && !locks.some(lock => lock.targetElement === targetElement)) {\n      const lock = {\n        targetElement,\n        options: options || {}\n      };\n\n      locks = [...locks, lock];\n\n      targetElement.ontouchstart = event => {\n        if (event.targetTouches.length === 1) {\n          // detect single touch.\n          initialClientY = event.targetTouches[0].clientY;\n        }\n      };\n      targetElement.ontouchmove = event => {\n        if (event.targetTouches.length === 1) {\n          // detect single touch.\n          handleScroll(event, targetElement);\n        }\n      };\n\n      if (!documentListenerAdded) {\n        document.addEventListener('touchmove', preventDefault, hasPassiveEvents ? { passive: false } : undefined);\n        documentListenerAdded = true;\n      }\n    }\n  } else {\n    setOverflowHidden(options);\n    const lock = {\n      targetElement,\n      options: options || {}\n    };\n\n    locks = [...locks, lock];\n  }\n};\n\nexport const clearAllBodyScrollLocks = () => {\n  if (isIosDevice) {\n    // Clear all locks ontouchstart/ontouchmove handlers, and the references.\n    locks.forEach(lock => {\n      lock.targetElement.ontouchstart = null;\n      lock.targetElement.ontouchmove = null;\n    });\n\n    if (documentListenerAdded) {\n      document.removeEventListener('touchmove', preventDefault, hasPassiveEvents ? { passive: false } : undefined);\n      documentListenerAdded = false;\n    }\n\n    locks = [];\n\n    // Reset initial clientY.\n    initialClientY = -1;\n  } else {\n    restoreOverflowSetting();\n    locks = [];\n  }\n};\n\nexport const enableBodyScroll = targetElement => {\n  if (isIosDevice) {\n    if (!targetElement) {\n      // eslint-disable-next-line no-console\n      console.error('enableBodyScroll unsuccessful - targetElement must be provided when calling enableBodyScroll on IOS devices.');\n      return;\n    }\n\n    targetElement.ontouchstart = null;\n    targetElement.ontouchmove = null;\n\n    locks = locks.filter(lock => lock.targetElement !== targetElement);\n\n    if (documentListenerAdded && locks.length === 0) {\n      document.removeEventListener('touchmove', preventDefault, hasPassiveEvents ? { passive: false } : undefined);\n\n      documentListenerAdded = false;\n    }\n  } else {\n    locks = locks.filter(lock => lock.targetElement !== targetElement);\n    if (!locks.length) {\n      restoreOverflowSetting();\n    }\n  }\n};\n\n","import { disableBodyScroll, clearAllBodyScrollLocks } from 'body-scroll-lock';\r\nimport BaseFeature from '../../foundation/base/base';\r\n\r\nclass Header extends BaseFeature {\r\n\tconstructor(element) {\r\n\t\tsuper(element);\r\n\r\n\t\tthis.el = element;\r\n\t\tthis.log('Header Feature Init');\r\n\r\n\t\tthis.classes = {\r\n\t\t\tnavIsOpen: 'is-open'\r\n\t\t};\r\n\r\n\t\tthis.initDomCache();\r\n\t\tthis.init();\r\n\t}\r\n\r\n\tinit() {\r\n\t\tthis.dom.navController.addEventListener('click', () => {\r\n\t\t\tthis.setNavIsOpen();\r\n\t\t});\r\n\t}\r\n\r\n\tnavIsOpen() {\r\n\t\treturn this.dom.navController.checked;\r\n\t}\r\n\r\n\tsetNavIsOpen() {\r\n\t\tconst isNavOpen = this.navIsOpen();\r\n\r\n\t\t// Toggle the class based on our test\r\n\t\tthis.el.classList.toggle(this.classes.navIsOpen, isNavOpen);\r\n\r\n\t\t// Lock scrolling on body\r\n\t\tif (isNavOpen) {\r\n\t\t\tdisableBodyScroll(this.dom.navPanel, {\r\n\t\t\t\treserveScrollBarGap: true\r\n\t\t\t});\r\n\t\t} else {\r\n\t\t\tclearAllBodyScrollLocks();\r\n\t\t}\r\n\t}\r\n}\r\n\r\nexport default Header;\r\n","var $ = require('../internals/export');\nvar fails = require('../internals/fails');\nvar toObject = require('../internals/to-object');\nvar nativeGetPrototypeOf = require('../internals/object-get-prototype-of');\nvar CORRECT_PROTOTYPE_GETTER = require('../internals/correct-prototype-getter');\n\nvar FAILS_ON_PRIMITIVES = fails(function () { nativeGetPrototypeOf(1); });\n\n// `Object.getPrototypeOf` method\n// https://tc39.github.io/ecma262/#sec-object.getprototypeof\n$({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES, sham: !CORRECT_PROTOTYPE_GETTER }, {\n  getPrototypeOf: function getPrototypeOf(it) {\n    return nativeGetPrototypeOf(toObject(it));\n  }\n});\n\n"],"sourceRoot":""}