Manifest V3 importScripts try/catch demo

background.js

// Copyright 2021 Google LLC
//
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file or at
// https://developers.google.com/open-source/licenses/bsd

// Use importScripts to load other JS files
importScripts('./lib.js');

console.log(self.demo.greeting);

/*
 * Uncomment this block and reload the extension to see how errors are
 * handled. Currently (as of 2021-07-23) the extension's error page will
 * log "SyntaxError: Unexpected end of input", but the console will contain
 * a more detailed log message showing what error was thrown and where.
 */

// throw new Error('Testing error handling');

bg-wrapper.js

// Copyright 2021 Google LLC
//
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file or at
// https://developers.google.com/open-source/licenses/bsd

try {
  importScripts('./background.js');
} catch (e) {
  console.error(e);
}

lib.js

// Copyright 2021 Google LLC
//
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file or at
// https://developers.google.com/open-source/licenses/bsd

self.demo = {
  greeting: 'Hello, world!'
}

manifest.json

{
  "name": "importScripts try/catch demo",
  "version": "1.0",
  "manifest_version": 3,
  "background": {
    "service_worker": "bg-wrapper.js"
  }
}