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Try To fetch latest data first then shift to cached one. (#1819)

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* fetch latest data first then shift to cached one

* improved offline experience

Co-authored-by: Jeffrey Warren <jeff@unterbahn.com>
This commit is contained in:
Vivek Singh
2021-02-27 22:08:45 +05:30
committed by GitHub
parent 0580218c63
commit 71bf8c872b
3 changed files with 93 additions and 37 deletions
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56
examples/lib/cache.js
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@@ -1,5 +1,3 @@
const { reject } = require("lodash");
var setupCache = function() {
let newWorker; // When sw.js is changed, this is the new service worker generated.
@@ -21,34 +19,38 @@ var setupCache = function() {
// Register the service worker.
navigator.serviceWorker.register('sw.js', { scope: '/examples/' })
.then(function(registration) {
registration.addEventListener('updatefound', () => {
// When sw.js has been changed, get a reference to the new service worker.
newWorker = registration.installing;
if(!newWorker){
return reject(new Error('error in installing service worker'));
}
return new Promise(function(resolve,reject){
newWorker.addEventListener('statechange', () => {
// Check if service worker state has changed.
switch(newWorker.state) {
case 'installed':
if(navigator.serviceWorker.controller) {
// New service worker available; prompt the user to update.
showUpdateModal();
$('#reload').on('click',(e) => {
e.preventDefault();
console.log('New Service Worker Installed Successfully');
location.reload();
return resolve();
})
}
// No updates available; do nothing.
break;
registration.addEventListener('updatefound', () => {
// When sw.js has been changed, get a reference to the new service worker.
newWorker = registration.installing;
case 'redundant':
return reject(new Error('installing new service worker now became redundant'));
}
if(!newWorker){
return reject(new Error('error in installing service worker'));
}
newWorker.addEventListener('statechange', () => {
// Check if service worker state has changed.
switch(newWorker.state) {
case 'installed':
if(navigator.serviceWorker.controller) {
// New service worker available; prompt the user to update.
showUpdateModal();
$('#reload').on('click',(e) => {
e.preventDefault();
console.log('New Service Worker Installed Successfully');
location.reload();
return resolve();
})
}
// No updates available; do nothing.
break;
case 'redundant':
return reject(new Error('installing new service worker now became redundant'));
}
})
})
})
}).catch(err => {