# Astro Worker
**Astro Worker** is a polyfill for using server-side Web Workers in Astro,
powered by [web-worker](https://github.com/developit/web-worker).
[![NPM Version][npm-img]][npm-url]
[![NPM Downloads][download-img]][download-url]
[![Open in StackBlitz][stackblitz-img]][stackblitz-url]
```bash
npm install @astropub/worker
```
## Usage
Import **@astropub/worker** in your Astro configuration.
```ts
import worker from "@astropub/worker"
import { defineConfig } from "astro/config"
export default defineConfig({
integrations: [
worker(),
],
})
```
### Creating a Worker
Create a worker in any Astro project.
```astro
---
/** @file /src/scripts/worker.ts */
addEventListener("message", (event) => {
console.log("client said:", event.data)
postMessage(event.data)
})
```
### Using a Worker
Import the worker into Astro frontmatter.
```astro
---
/** @file /src/pages/index.astro */
const worker = new Worker("../scripts/worker.ts", { type: "module" })
worker.addEventListener("message", (event) => {
console.log("worker said:", event.data)
})
worker.postMessage("Hello")
---
Example
Example
```
Alternatively, import the worker into a client-side script.
```astro
---
/** @file /src/pages/index.astro */
---
Example
Example
```
Enjoy!
---
Code original to this project is licensed under the MIT No Attribution License.
Code from [web-worker](https://github.com/developit/web-worker) is licensed
under the Apache License (Apache-2.0), copyright Jason Miller.
[chat-url]: https://astro.build/chat
[docs-url]: https://github.com/astro-community/worker
[npm-img]: https://img.shields.io/npm/v/@astropub/worker?color=%23444&label=&labelColor=%23CB0000&logo=data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHZpZXdCb3g9IjE1MCAxNTAgNDAwIDQwMCIgZmlsbD0iI0ZGRiI+PHBhdGggZD0iTTE1MCA1NTBoMjAwVjI1MGgxMDB2MzAwaDEwMFYxNTBIMTUweiIvPjwvc3ZnPg==&style=for-the-badge
[npm-url]: https://www.npmjs.com/package/@astropub/worker
[stackblitz-img]: https://img.shields.io/badge/-Open%20in%20Stackblitz-%231374EF?color=%23444&labelColor=%231374EF&logo=data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHZpZXdCb3g9IjEwIDggMTIgMTgiIGhlaWdodD0iMTgiIGZpbGw9IiNGRkYiPjxwYXRoIGQ9Ik0xMCAxNy42aDUuMmwtMyA3LjRMMjIgMTQuNGgtNS4ybDMtNy40TDEwIDE3LjZaIi8+PC9zdmc+&style=for-the-badge
[stackblitz-url]: https://stackblitz.com/github/astro-community/worker/tree/main/demo?file=README.md
[bundlejs-img]: https://img.shields.io/bundlejs/size/@astropub%2Fworker?style=for-the-badge
[bundlejs-url]: https://bundlejs.com/?bundle&q=@astropub/worker
[download-url]: https://www.npmjs.com/package/@astropub/worker
[download-img]: https://img.shields.io/badge/dynamic/json?url=https://api.npmjs.org/downloads/point/last-week/@astropub/worker&query=downloads&label=⇓+week&color=%23444&labelColor=%23EEd100&style=for-the-badge
**Astro Worker** is a polyfill for using server-side Web Workers in Astro,
powered by [web-worker](https://github.com/developit/web-worker).
[![NPM Version][npm-img]][npm-url]
[![NPM Downloads][download-img]][download-url]
[![Open in StackBlitz][stackblitz-img]][stackblitz-url]
```bash
npm install @astropub/worker
```
## Usage
Import **@astropub/worker** in your Astro configuration.
```ts
import worker from "@astropub/worker"
import { defineConfig } from "astro/config"
export default defineConfig({
integrations: [
worker(),
],
})
```
### Creating a Worker
Create a worker in any Astro project.
```astro
---
/** @file /src/scripts/worker.ts */
addEventListener("message", (event) => {
console.log("client said:", event.data)
postMessage(event.data)
})
```
### Using a Worker
Import the worker into Astro frontmatter.
```astro
---
/** @file /src/pages/index.astro */
const worker = new Worker("../scripts/worker.ts", { type: "module" })
worker.addEventListener("message", (event) => {
console.log("worker said:", event.data)
})
worker.postMessage("Hello")
---