/**
* @license
* Copyright 2016 Google Inc. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
'use strict';
const Aggregate = require('../aggregate');
const serviceWorker = require('../../audits/offline/service-worker');
const worksOffline = require('../../audits/offline/works-offline');
class WorksOffline extends Aggregate {
/**
* @override
* @return {string}
*/
static get name() {
return 'App can load on offline/flaky connections';
}
/**
* @override
* @return {string}
*/
static get description() {
return `Ensuring your web app can respond when the network connection is unavailable or flaky is
critical to providing your users a good experience. This is achieved through use of a
<a href="https://developers.google.com/web/fundamentals/primers/service-worker/">Service Worker</a>.`;
}
/**
* @override
* @return {!AggregationType}
*/
static get type() {
return Aggregate.TYPES.PWA;
}
/**
* @override
* @return {!AggregationCriteria}
*/
static get criteria() {
const criteria = {};
criteria[serviceWorker.meta.name] = {
value: true,
weight: 1
};
criteria[worksOffline.meta.name] = {
value: true,
weight: 1
};
criteria['manifest-start-url'] = {
value: true,
weight: 0,
comingSoon: true,
description: 'Manifest\'s start_url is in cache storage for offline use',
category: 'Offline'
};
return criteria;
}
}
module.exports = WorksOffline;
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