I have the following code
w = new Worker('<?php echo base_url(); ?>'+"assets/js/web_worker.js");
w.postMessage({base_url:BASE_URL,site_url:SITE_URL});
This runs on each page load and the worker could take awhile to run task.
- Will the worker continue to run if I navigate away from page after I start it?
No, as soon as the context from which it has been generated has been killed, the Worker gets killed too.
- It seems the worker will start each page load regardless if it is finished. How do a see if the worker is running and NOT start another worker?
Indeed, a new Worker will start every time, but there won't be an other worker running as per one.
That is, if we talk about dedicated Workers.
A Shared-Worker would survive a page reload if an other page keeps it active during the reload.
And while that would be a misuse, a Service-Worker would definitely survive.
Actually the best might have been to start a Shared-Worker from a Service-Worker, but I think this is still not doable, despite active discussions.