【发布时间】：2019-05-14 20:25:05
【问题描述】：
在开发 Progressive-Web-App 时出现以下问题：
独立模式可以在不包括 service worker 的情况下完美运行 - 但不能使用。
- 没有 Service-Worker a2hs（添加到主屏幕）PWA 在
"standalone"-Mode 下正确启动。 - 添加 Service-Worker（a2hs + 已安装/Web-APK）后，PWA 在新 Chrome 窗口中打开新选项卡。
Chrome-PWA-审计：
login_mobile_tablet.jsf / 包括服务工作者：
<script>
if ('serviceWorker' in navigator) {
navigator.serviceWorker.register('../serviceWorker.js', {scope: "/application/"})
/* also tried ".", "/", "./" as scope value */
.then(function(registration) {
console.log('Service worker registration successful, scope is: ', registration.scope);
})
.catch(function(error) {
console.log('Service worker registration failed, error: ', error);
});
}
</script>
serviceWorker.js：
var cacheName = 'pwa-cache';
// A list of local resources we always want to be cached.
var filesToCache = [
'QS1.xhtml',
'pdf.xhtml',
'QS1.jsf',
'pdf.jsf',
'login_pages/login_mobile_tablet.jsf',
'login_pages/login_mobile_tablet.xhtml'
];
// The install handler takes care of precaching the resources we always need.
self.addEventListener('install', function(event) {
event.waitUntil(
caches.open(cacheName).then(function(cache) {
return cache.addAll(filesToCache);
})
);
})
// The activate handler takes care of cleaning up old caches.
self.addEventListener('activate', event => {
event.waitUntil(self.clients.claim());
});
// The fetch handler serves responses for same-origin resources from a cache.
self.addEventListener('fetch', event => {
// Workaround for error:
// TypeError: Failed to execute 'fetch' on 'ServiceWorkerGlobalScope': 'only-if-cached' can be set only with 'same-origin' mode
// see: https://stackoverflow.com/questions/48463483/what-causes-a-failed-to-execute-fetch-on-serviceworkerglobalscope-only-if
if (event.request.cache === 'only-if-cached' && event.request.mode !== 'same-origin')
return;
event.respondWith(
caches.match(event.request, {ignoreSearch: true})
.then(response => {
return response || fetch(event.request);
})
);
});
manifest.json：
{
"name":"[Hidden]",
"short_name":"[Hidden]",
"start_url":"/application/login_pages/login_mobile_tablet.jsf",
"scope":".",
"display":"standalone",
"background_color":"#4688B8",
"theme_color":"#4688B8",
"orientation":"landscape",
"icons":[
{
"src":"javax.faces.resource/images/icons/qsc_128.png.jsf",
"sizes":"128x128",
"type":"image/png"
},
{
"src":"javax.faces.resource/images/icons/qsc_144.png.jsf",
"sizes":"144x144",
"type":"image/png"
},
{
"src":"javax.faces.resource/images/icons/qsc_152.png.jsf",
"sizes":"152x152",
"type":"image/png"
},
{
"src":"javax.faces.resource/images/icons/qsc_192.png.jsf",
"sizes":"192x192",
"type":"image/png"
},
{
"src":"javax.faces.resource/images/icons/qsc_256.png.jsf",
"sizes":"256x256",
"type":"image/png"
},
{
"src":"javax.faces.resource/images/icons/qsc_512.png.jsf",
"sizes":"512x512",
"type":"image/png"
}
]
}
已考虑以下问题/答案 - 但未找到解决方案：
【问题讨论】：
标签： android google-chrome service-worker progressive-web-apps manifest.json