Created
September 27, 2023 13:44
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simple test case for a JS ServiceWorker with import statement.
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| <!DOCTYPE html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="UTF-8"> | |
| <meta name="viewport" content="width=device-width, initial-scale=1.0"> | |
| <title>Test</title> | |
| </head> | |
| <body> | |
| <h2>Output:</h2> | |
| <div id="out"></div> | |
| <script type="module"> | |
| const out = document.getElementById('out'); | |
| const processResponse = (event) => { | |
| const p = document.createElement('p') | |
| p.innerText = JSON.stringify(event.data) | |
| out.appendChild(p) | |
| } | |
| const pingWorker = () => { | |
| navigator.serviceWorker.controller?.postMessage("ping " + (new Date()).getTime()) | |
| } | |
| navigator.serviceWorker.register('./sw.js', { type: "module" }) | |
| .catch((err) => { | |
| console.error("ServiceWorker failed to register."); | |
| console.error(err); | |
| }) | |
| navigator.serviceWorker.addEventListener("message", processResponse); | |
| setInterval(pingWorker, 2000); | |
| </script> | |
| </body> | |
| </html> |
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| export const FOO = "BAR"; |
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| // This is supposed to be working on Firefox 114 and later | |
| import { FOO } from './module.js'; | |
| self.addEventListener("install", (_event) => { | |
| self.skipWaiting(); | |
| }); | |
| self.addEventListener("activate", (event) => { | |
| event.waitUntil(clients.claim()); | |
| }); | |
| self.addEventListener("message", (event) => { | |
| event.source.postMessage({ pong: event.data, foo: FOO }); | |
| }) |
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In Firefox (up to the current nightly v120), the import statement in
sw.jsmakes the registration of the service worker crash withTypeError: ServiceWorker script at https://localhost:9292/sw.js for scope https://localhost:9292/ threw an exception during script evaluation.It works: