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@eshaz/web-worker
Advanced tools
Native cross-platform Web Workers. Works in published npm modules.
In Node, it's a web-compatible Worker implementation atop Node's worker_threads.
In the browser (and when bundled for the browser), it's simply an alias of Worker
.
Here's how this is different from worker_threads:
{type:'module'}
) natively in Node 12.8+Event.data
, Event.type
, etc)worker.onmessage=..
)Worker()
accepts a module URL, Blob URL or Data URLIn its simplest form:
import Worker from 'web-worker';
const worker = new Worker('data:,postMessage("hello")');
worker.onmessage = e => console.log(e.data); // "hello"
main.js | worker.js |
---|---|
|
|
👉 Notice how new URL('./worker.js', import.meta.url)
is used above to load the worker relative to the current module instead of the application base URL. Without this, Worker URLs are relative to a document's URL, which in Node.js is interpreted to be process.cwd()
.
Support for this pattern in build tools and test frameworks is still limited. We are working on growing this.
Module Workers are supported in Node 12.8+ using this plugin, leveraging Node's native ES Modules support. In the browser, they can be used natively in Chrome 80+, or in all browsers via worker-plugin or rollup-plugin-off-main-thread. As with classic workers, there is no difference in usage between Node and the browser:
main.mjs | worker.mjs |
---|---|
|
|
Instantiating Worker using a Data URL is supported in both module and classic workers:
import Worker from 'web-worker';
const worker = new Worker(`data:application/javascript,postMessage(42)`);
worker.addEventListener('message', e => {
console.log(e.data) // 42
});
This module aims to provide a simple and forgettable piece of infrastructure,
and as such it needed an obvious and descriptive name.
@calvinmetcalf, who you may recognize as the author of Lie and other fine modules, gratiously offered up the name from his web-worker
package.
Thanks Calvin!
FAQs
Consistent Web Workers in browser and Node.
The npm package @eshaz/web-worker receives a total of 167,193 weekly downloads. As such, @eshaz/web-worker popularity was classified as popular.
We found that @eshaz/web-worker demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 1 open source maintainer collaborating on the project.
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