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However, it also means that developers (and users)\n// will only see deployed updates on the \"N+1\" visit to a page, since previously\n// cached resources are updated in the background.\n\nvar isLocalhost = function () { return Boolean(\n  window.location.hostname === 'localhost' ||\n    // [::1] is the IPv6 localhost address.\n    window.location.hostname === '[::1]' ||\n    // 127.0.0.1/8 is considered localhost for IPv4.\n    window.location.hostname.match(\n      /^127(?:\\.(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)){3}$/\n    )\n); }\n\nvar waitWindowLoad\n// https://github.com/yyx990803/register-service-worker/pull/33#discussion_r394181861\nif (typeof window !== 'undefined') {\n  // Typically, a browser that supports `serviceWorker` should also have supported\n  // `Promise`. But as this package can be used in environments without service\n  // worker support (in that case it would do nothing), there's a chance that\n  // `Promise` does not exist. So we must check for its existence first.\n  if (typeof Promise !== 'undefined') {\n    waitWindowLoad = new Promise(function (resolve) { return window.addEventListener('load', resolve); })\n  } else {\n    waitWindowLoad = { then: function (cb) { return window.addEventListener('load', cb); } }\n  }\n}\n\nexport function register (swUrl, hooks) {\n  if ( hooks === void 0 ) hooks = {};\n\n  var registrationOptions = hooks.registrationOptions; if ( registrationOptions === void 0 ) registrationOptions = {};\n  delete hooks.registrationOptions\n\n  var emit = function (hook) {\n    var args = [], len = arguments.length - 1;\n    while ( len-- > 0 ) args[ len ] = arguments[ len + 1 ];\n\n    if (hooks && hooks[hook]) {\n      hooks[hook].apply(hooks, args)\n    }\n  }\n\n  if ('serviceWorker' in navigator) {\n    waitWindowLoad.then(function () {\n      if (isLocalhost()) {\n        // This is running on localhost. Lets check if a service worker still exists or not.\n        checkValidServiceWorker(swUrl, emit, registrationOptions)\n        navigator.serviceWorker.ready.then(function (registration) {\n          emit('ready', registration)\n        }).catch(function (error) { return handleError(emit, error); })\n      } else {\n        // Is not local host. Just register service worker\n        registerValidSW(swUrl, emit, registrationOptions)\n        navigator.serviceWorker.ready.then(function (registration) {\n          emit('ready', registration)\n        }).catch(function (error) { return handleError(emit, error); })\n      }\n    })\n  }\n}\n\nfunction handleError (emit, error) {\n  if (!navigator.onLine) {\n    emit('offline')\n  }\n  emit('error', error)\n}\n\nfunction registerValidSW (swUrl, emit, registrationOptions) {\n  navigator.serviceWorker\n    .register(swUrl, registrationOptions)\n    .then(function (registration) {\n      emit('registered', registration)\n      if (registration.waiting) {\n        emit('updated', registration)\n        return\n      }\n      registration.onupdatefound = function () {\n        emit('updatefound', registration)\n        var installingWorker = registration.installing\n        installingWorker.onstatechange = function () {\n          if (installingWorker.state === 'installed') {\n            if (navigator.serviceWorker.controller) {\n              // At this point, the old content will have been purged and\n              // the fresh content will have been added to the cache.\n              // It's the perfect time to display a \"New content is\n              // available; please refresh.\" message in your web app.\n              emit('updated', registration)\n            } else {\n              // At this point, everything has been precached.\n              // It's the perfect time to display a\n              // \"Content is cached for offline use.\" message.\n              emit('cached', registration)\n            }\n          }\n        }\n      }\n    })\n    .catch(function (error) { return handleError(emit, error); })\n}\n\nfunction checkValidServiceWorker (swUrl, emit, registrationOptions) {\n  // Check if the service worker can be found.\n  fetch(swUrl)\n    .then(function (response) {\n      // Ensure service worker exists, and that we really are getting a JS file.\n      if (response.status === 404) {\n        // No service worker found.\n        emit('error', new Error((\"Service worker not found at \" + swUrl)))\n        unregister()\n      } else if (response.headers.get('content-type').indexOf('javascript') === -1) {\n        emit('error', new Error(\n          \"Expected \" + swUrl + \" to have javascript content-type, \" +\n          \"but received \" + (response.headers.get('content-type'))))\n        unregister()\n      } else {\n        // Service worker found. Proceed as normal.\n        registerValidSW(swUrl, emit, registrationOptions)\n      }\n    })\n    .catch(function (error) { return handleError(emit, error); })\n}\n\nexport function unregister () {\n  if ('serviceWorker' in navigator) {\n    navigator.serviceWorker.ready.then(function (registration) {\n      registration.unregister()\n    }).catch(function (error) { return handleError(emit, error); })\n  }\n}\n","/* eslint-disable no-console */\n\nimport { register } from \"register-service-worker\";\n\nif (process.env.NODE_ENV === \"production\") {\n    register(`/service-worker.js`, {\n        ready() {\n            console.log(\n                \"App is being served from cache by a service worker.\\n\" +\n                    \"For more details, visit https://goo.gl/AFskqB\",\n            );\n        },\n        registered() {\n            console.log(\"Service worker has been registered.\");\n        },\n        cached() {\n            console.log(\"Content has been cached for offline use.\");\n        },\n        updatefound() {\n            console.log(\"New content is downloading.\");\n        },\n        updated() {\n            console.log(\"New content is available; please refresh.\");\n            window.location.reload();\n        },\n        offline() {\n            console.log(\"No internet connection found. App is running in offline mode.\");\n        },\n        error(error) {\n            console.error(\"Error during service worker registration:\", error);\n        },\n    });\n}\n"],"sourceRoot":""}