added error message in case web worker cannot be started on web-app

ng-app/index-web.html

@@ -118,12 +118,15 @@
       const supported = (() => {
         if (RegExp().hasIndices === undefined) return false;
         try {
+            if (Worker === undefined) return false;
+            new Worker(URL.createObjectURL(new Blob(['console.log("webworker ok");'], {type: 'application/javascript'})));
             if (typeof WebAssembly === "object"
                 && typeof WebAssembly.instantiate === "function") {
                 const module = new WebAssembly.Module(Uint8Array.of(0x0, 0x61, 0x73, 0x6d, 0x01, 0x00, 0x00, 0x00));
                 if (module instanceof WebAssembly.Module)
                     return new WebAssembly.Instance(module) instanceof WebAssembly.Instance;
             }
+            
         } catch (e) {
         }
         return false;

ng-app/src/lib/Login.svelte

@@ -258,6 +258,7 @@
       }
     } catch (e) {
       console.error(e);
+      if (e.message.includes("constructor") || (typeof e === "string" && e.includes("constructor") )) e = "BrowserTooOld";
       error = e;
       step = "end";
       dispatch("error", { error: e });

ng-app/src/locales/en.json

@@ -603,7 +603,8 @@
     "WsError": "WebSocket error",
     "cannot_load_this_file": "Cannot load this file",
     "graph_not_found": "Graph not found",
-    "no_wasm_on_old_safari": "Your Safari browser is too old (version before 14.1). As a result we cannot load Automerge, needed for this document. Please upgrade your macOS or iOS system"
+    "no_wasm_on_old_safari": "Your Safari browser is too old (version before 14.1). As a result we cannot load Automerge, needed for this document. Please upgrade your macOS or iOS system",
+    "BrowserTooOld": "Your browser is too old. Please upgrade it, use another browser, or install our native app"
   },
   "connectivity": {
     "stopped": "Stopped",

ng-app/src/routes/WalletCreate.svelte

@@ -173,6 +173,17 @@
   async function bootstrap() {
     //console.log(await ng.client_info());
     if (!tauri_platform || tauri_platform == "android") {
+
+      if (!tauri_platform) {
+        try {
+          let worker_import = await import("../workertest.js?worker&inline");
+          const myWorker = new worker_import.default();
+        } catch (e) {
+          registration_error = "BrowserTooOld";
+          return;
+        }
+      }
+
       if (param.get("skipintro") || param.get("rs")) {
         intro = false;
       }

ng-app/src/workertest.js

@@ -0,0 +1 @@
+console.log("workertest ok");