1 files changed, 59 insertions, 0 deletions
diff --git a/src/assets/sw.mjs b/src/assets/sw.mjs
new file mode 100644
index 0000000..78d659a
--- /dev/null
+++ b/src/assets/sw.mjs
@@ -0,0 +1,59 @@
+const sw_cache = {
+    offline: "/offline.html",
+    default: [
+        "/index.css",
+        "/prism.css",
+        "/index.js",
+        "/favicon/icon.svg",
+        "/offline.html",
+        "/"
+    ],
+    // eslint-disable-next-line no-undef
+    store: VERSION,
+}
+
+self.addEventListener('install', event => {
+    self.skipWaiting()
+    event.waitUntil((async() => {
+        const cache = await self.caches.open(sw_cache.store)
+        return cache.addAll(sw_cache.default)
+    })())
+})
+
+self.addEventListener('activate', event => {
+    event.waitUntil((async() => {
+        const keys = await self.caches.keys()
+        Promise.all(keys.map(key => {
+            if (key !== sw_cache.store) {
+                return self.caches.delete(key)
+            }
+        }))
+    })())
+})
+
+self.addEventListener('fetch', event => {
+    event.respondWith((async() => {
+        if (event.request.method != 'GET') {
+            return fetch(event.request)
+        }
+
+        const req_url = new URL(event.request.url)
+        if (req_url.origin != self.location.origin) {
+            return fetch(event.request)
+        }
+
+        const cacheres = await self.caches.match(event.request)
+        return cacheres || (async() => {
+            try {
+                const response = await self.fetch(event.request)
+                const cache = await self.caches.open(sw_cache.store)
+                cache.put(event.request, response.clone())
+                return response
+            } catch {
+                return self.caches.match(sw_cache.offline)
+            }
+        })()
+    })())
+
+
+})
+\ No newline at end of file