3 files changed, 85 insertions, 0 deletions
diff --git a/ui/app.html b/ui/app.html
index 10525fe..5e7d92b 100644
--- a/ui/app.html
+++ b/ui/app.html
@@ -4,6 +4,7 @@
     <meta charset="utf-8" />
     <link rel="icon" href="%sveltekit.assets%/favicon.png" />
     <meta name="viewport" content="width=device-width, initial-scale=1" />
+    <link rel="manifest" href="%sveltekit.assets%/manifest.json" />
     %sveltekit.head%
   </head>
   <body data-sveltekit-preload-data="hover" data-theme="skeleton">
diff --git a/ui/service-worker.js b/ui/service-worker.js
new file mode 100644
index 0000000..033c8d9
--- /dev/null
+++ b/ui/service-worker.js
@@ -0,0 +1,41 @@
+/// <reference types="@sveltejs/kit" />
+/// <reference no-default-lib="true"/>
+/// <reference lib="esnext" />
+/// <reference lib="webworker" />
+
+// Because of this line, this service worker won't run in dev mode in Firefox.
+// Only Safari, Edge, Chrome can run it at the moment, because only they
+// support modules in service workers.
+//
+// That's okay! If you run `tools/run` with HI_DEV unset, you will get the
+// bundled version, and can work on it. Or just use Safari.
+import { build, files, version } from '$service-worker';
+
+// Create a unique cache name for this deployment
+const CACHE = `cache-${version}`;
+
+const ASSETS = [
+	...build, // the app itself
+	...files  // everything in `static`
+];
+
+self.addEventListener('install', (event) => {
+	// Create a new cache and add all files to it
+	async function addFilesToCache() {
+		const cache = await caches.open(CACHE);
+		await cache.addAll(ASSETS);
+	}
+
+	event.waitUntil(addFilesToCache());
+});
+
+self.addEventListener('activate', (event) => {
+	// Remove previous cached data from disk
+	async function deleteOldCaches() {
+		for (const key of await caches.keys()) {
+			if (key !== CACHE) await caches.delete(key);
+		}
+	}
+
+	event.waitUntil(deleteOldCaches());
+});
diff --git a/ui/static/manifest.json b/ui/static/manifest.json
new file mode 100644
index 0000000..2d4cf39
--- /dev/null
+++ b/ui/static/manifest.json
@@ -0,0 +1,43 @@
+{
+  "name": "Pilcrow",
+  "short_name": "Pilcrow",
+  "start_url": "index.html",
+  "display": "standalone",
+  "background_color": "#fdfdfd",
+  "theme_color": "#db4938",
+  "orientation": "portrait-primary",
+  "icons": [
+    {
+      "src": "/favicon.png",
+      "type": "image/png", "sizes": "72x72"
+    },
+    {
+      "src": "/favicon.png",
+      "type": "image/png", "sizes": "96x96"
+    },
+    {
+      "src": "/favicon.png",
+      "type": "image/png","sizes": "128x128"
+    },
+    {
+      "src": "/favicon.png",
+      "type": "image/png", "sizes": "144x144"
+    },
+    {
+      "src": "/favicon.png",
+      "type": "image/png", "sizes": "152x152"
+    },
+    {
+      "src": "/favicon.png",
+      "type": "image/png", "sizes": "192x192"
+    },
+    {
+      "src": "/favicon.png",
+      "type": "image/png", "sizes": "384x384"
+    },
+    {
+      "src": "/favicon.png",
+      "type": "image/png", "sizes": "512x512"
+    }
+  ]
+}