npm i worker-with-import-map-
WorkerWithImportMapViaInlineFrame: Enabling importmaps in web workers via iframes as workers.
-
WorkerWithImportMapViaBedfordsShim: Same polyfill idea, but using @guybedford's ESM shim inside a normal
Worker.
test.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Test</title>
<script type="importmap">{"imports": {
"worker-with-import-map": "./node_modules/worker-with-import-map/src/index.js"
}}</script>
<script type="module" src="test.js"></script>
</head>
</html>test.js
import {Worker} from 'worker-with-import-map';
const worker = new Worker('./worker-script.js');
worker.postMessage({hello: 'ping'});worker-script.js
// Here you can import anything you want now with import map support!
import {funny} from 'one-of-your-fancy-libs';
self.onmessage = (e) => {
const haiToo = funny('pong');
self.postMessage({haiToo});
}This works in client and server, buildless (aka no build tools like rollup or Webpack required).
Please just clone this repo and test:
That will give you a better picture with non-trivial code and showing off how you can re-use your importmap too.
Just test it and report feedback, if you feel like it.
Fun!