Как заставить работать скрипт

const VERSION_CHECK_SUPPORTED="Ваша версия iOS поддерживается.";
const VERSION_CHECK_NEEDS_UPGRADE="This package requires an upgrade to at least iOS %s.";
const VERSION_CHECK_UNCONFIRMED="This package is not yet confirmed to work on iOS %s.";
const VERSION_CHECK_NO_LONGER_SUPPORTED="This package is only compatible with iOS %s to %s and is no longer supported.";
(function(document){"use strict";function parseVersionString(version){var bits=version.split(".");
return[bits[0],bits[1]?bits[1]:0,bits[2]?bits[2]:0];}
var prerequisite=document.querySelector(".prerequisite"),version=navigator.appVersion.match(/CPU( iPhone)? OS (\d+)_(\d+)(_(\d+))? like/i);
if(!prerequisite||!version){return;}
var osVersion=[version[2],version[3],version[4]?version[4]:0],osString=osVersion[0]+"."+ osVersion[1]+(osVersion[2]&&osVersion[2]!=0?"."+ osVersion[2]:""),minString=prerequisite.dataset.minIos,maxString=prerequisite.dataset.maxIos,testString=prerequisite.dataset.maxTestedIos,minVersion=parseVersionString(minString),maxVersion=maxString?parseVersionString(maxString):null,testVersion=testString?parseVersionString(testString):null,message=VERSION_CHECK_SUPPORTED,isBad=false;
if(minVersion[0]>osVersion[0]||minVersion[1]>osVersion[1]||minVersion[2]>osVersion[2]){message=VERSION_CHECK_NEEDS_UPGRADE.replace("%s",minString);isBad=true;}
else if(maxVersion&&(osVersion[0]>maxVersion[0]||osVersion[1]>maxVersion[1])){
if(prerequisite.dataset.unsupported){message=VERSION_CHECK_NO_LONGER_SUPPORTED.replace("%s",minString).replace("%s",maxString);}
else{message=VERSION_CHECK_UNCONFIRMED.replace("%s",osString);}
isBad=true;}
prerequisite.querySelector("p").textContent=message;if(isBad){prerequisite.classList.add("info");}})(document);

constVERSION_CHECK_SUPPORTED = 'Ваша версия iOS поддерживается.';
constVERSION_CHECK_NEEDS_UPGRADE = 'This package requires an upgrade to at least iOS %s.';
constVERSION_CHECK_UNCONFIRMED = 'This package is not yet confirmed to work on iOS %s.';
constVERSION_CHECK_NO_LONGER_SUPPORTED = 'This package is only compatible with iOS %s to %s and is no longer supported.';
(function (document) {
  'use strict';
  function parseVersionString(version) {
    var bits = version.split('.');
    return [bits[0],
    bits[1] ? bits[1] : 0,
    bits[2] ? bits[2] : 0];
  }
  var prerequisite = document.querySelector('.prerequisite'),
  version = navigator.appVersion.match(/CPU( iPhone)? OS (\d+)_(\d+)(_(\d+))? like/i);
  if (!prerequisite || !version) {
    return;
  }
  var osVersion = [
    version[2],
    version[3],
    version[4] ? version[4] : 0
  ],
  osString = osVersion[0] + '.' + osVersion[1] + (osVersion[2] && osVersion[2] != 0 ? '.' + osVersion[2] : ''),
  minString = prerequisite.dataset.minIos,
  maxString = prerequisite.dataset.maxIos,
  testString = prerequisite.dataset.maxTestedIos,
  minVersion = parseVersionString(minString),
  maxVersion = maxString ? parseVersionString(maxString)  : null,
  testVersion = testString ? parseVersionString(testString)  : null,
  message = VERSION_CHECK_SUPPORTED,
  isBad = false;
  if (minVersion[0] > osVersion[0] || minVersion[1] > osVersion[1] || minVersion[2] > osVersion[2]) {
    message = VERSION_CHECK_NEEDS_UPGRADE.replace('%s', minString);
    isBad = true;
  } 
  else if (maxVersion && (osVersion[0] > maxVersion[0] || osVersion[1] > maxVersion[1])) {
    if (prerequisite.dataset.unsupported) {
      message = VERSION_CHECK_NO_LONGER_SUPPORTED.replace('%s', minString).replace('%s', maxString);
    } 
    else {
      message = VERSION_CHECK_UNCONFIRMED.replace('%s', osString);
    }
    isBad = true;
  }
  prerequisite.querySelector('p').textContent = message;
  if (isBad) {
    prerequisite.classList.add('info');
  }
}) (document);