Add error handling to workbox import.

Author: cpojer

src/client/build/register.ts

@@ -37,7 +37,12 @@ export function registerSW(options: RegisterSWOptions = {}) {
 
   async function register() {
     if ('serviceWorker' in navigator) {
-      const { Workbox } = await import('workbox-window')
+      const { Workbox } = await import('workbox-window').catch(() => ({Workbox: null}));
+      if (!Workbox) {
+        // Workbox could not be imported.
+        return;
+      }
+
       // __SW__, __SCOPE__ and __TYPE__ will be replaced by virtual module
       wb = new Workbox('__SW__', { scope: '__SCOPE__', type: '__TYPE__' })
       sendSkipWaitingMessage = async () => {