Start work on pwa

web-frontend/package.json

@@ -25,6 +25,7 @@
 		"svelte-check": "^3.0.1",
 		"typescript": "^4.9.3",
 		"vite": "^4.1.4",
+		"vite-plugin-pwa": "^0.14.4",
 		"vite-plugin-wasm-pack": "^0.1.12"
 	},
 	"type": "module"

web-frontend/src/routes/+page.svelte

@@ -6,8 +6,7 @@
 	let mapElement;
 	let map;
 	let wasm;
-	let lat = '';
-	let lon = '';
+	let latlng = { lat: '', lng: '' };
 	let addr = '';
 
 	onMount(async () => {
@@ -27,9 +26,8 @@
 
 			map.on('click', (e) => {
 				try {
-					lat = '' + e.latlng.lat;
-					lon = '' + e.latlng.lng;
-					addr = address_from_lat_lon(e.latlng.lat, e.latlng.lng);
+					latlng = e.latlng;
+					addr = address_from_lat_lon(latlng.lat, latlng.lng);
 					popup.setLatLng(e.latlng).setContent(`You clicked at ${addr}`).openOn(map);
 				} catch (err) {
 					console.error(err);
@@ -60,7 +58,7 @@
 	{/await}
 </p>
 
-<p>Current cursor: {addr} => ({lat}, {lon})</p>
+<p>Current cursor: {addr} => ({latlng.lat}, {latlng.lng})</p>
 
 <main>
 	<div bind:this={mapElement} />

web-frontend/vite.config.js

@@ -1,7 +1,8 @@
 import { sveltekit } from '@sveltejs/kit/vite';
 import wasmPack from 'vite-plugin-wasm-pack';
 import { defineConfig } from 'vite';
+import { VitePWA } from 'vite-plugin-pwa';
 
 export default defineConfig({
-	plugins: [sveltekit(), wasmPack('../this_algorithm-wasm/')]
+	plugins: [sveltekit(), wasmPack('../this_algorithm-wasm/'), VitePWA()]
 });