https://portierramaryaire.com/service-worker.js

1'use strict';
2
3self.addEventListener('install', () => {
4	// Register self as the primary service worker
5	self.skipWaiting();
6});
7
8self.addEventListener('activate', (event) => {
9	// Take responsibility over existing clients from old service worker
10	event.waitUntil(self.clients.claim());
11});
12
13self.addEventListener('fetch', function (event) {
14	// This is the code that ignores post requests
15	// https://github.com/NodeBB/NodeBB/issues/9151
16	// https://github.com/w3c/ServiceWorker/issues/1141
17	// https://stackoverflow.com/questions/54448367/ajax-xmlhttprequest-progress-monitoring-doesnt-work-with-service-workers
18	if (event.request.method === 'POST') {
19		return;
20	}
21
22	event.respondWith(caches.match(event.request).then(function (response) {
23		if (!response) {
24			return fetch(event.request);
25		}
26
27		return response;
28	}));
29});