feat: release Colour Tools 0.1.0

public/sw.js

@@ -0,0 +1,79 @@
+const CACHE_PREFIX = "colour-tools-shell-";
+const CACHE_NAME = `${CACHE_PREFIX}0.1.0`;
+const CORE = ["./", "./manifest.webmanifest", "./favicon.svg"];
+
+self.addEventListener("install", (event) => {
+  event.waitUntil(
+    caches.open(CACHE_NAME).then(async (cache) => {
+      await cache.addAll(CORE);
+      const response = await fetch("./");
+      const html = await response.text();
+      const assets = [...html.matchAll(/(?:src|href)="(\.\/assets\/[^"]+)"/g)]
+        .map((match) => match[1])
+        .filter(Boolean);
+      await cache.addAll(assets);
+    }),
+  );
+  self.skipWaiting();
+});
+
+self.addEventListener("activate", (event) => {
+  event.waitUntil(
+    caches
+      .keys()
+      .then((keys) =>
+        Promise.all(
+          keys
+            .filter((key) => key.startsWith(CACHE_PREFIX) && key !== CACHE_NAME)
+            .map((key) => caches.delete(key)),
+        ),
+      )
+      .then(() => self.clients.claim()),
+  );
+});
+
+self.addEventListener("fetch", (event) => {
+  if (event.request.method !== "GET") return;
+  const url = new URL(event.request.url);
+  if (url.origin !== self.location.origin) return;
+  const scope = new URL(self.registration.scope);
+  if (!url.pathname.startsWith(scope.pathname)) return;
+
+  if (event.request.mode === "navigate") {
+    event.respondWith(
+      fetch(event.request)
+        .then((response) => {
+          if (response.ok) {
+            const copy = response.clone();
+            void caches
+              .open(CACHE_NAME)
+              .then((cache) => cache.put(event.request, copy));
+          }
+          return response;
+        })
+        .catch(async () => {
+          const cached = await caches.match(event.request);
+          if (cached) return cached;
+          const shellUrl = new URL("./", self.registration.scope).href;
+          return (await caches.match(shellUrl)) ?? Response.error();
+        }),
+    );
+    return;
+  }
+
+  event.respondWith(
+    caches.match(event.request).then(
+      (cached) =>
+        cached ??
+        fetch(event.request).then((response) => {
+          if (response.ok) {
+            const copy = response.clone();
+            void caches
+              .open(CACHE_NAME)
+              .then((cache) => cache.put(event.request, copy));
+          }
+          return response;
+        }),
+    ),
+  );
+});