barren shoal
I have this code: new Worker in a script and import the script by using <script src="./index.js"></script>.
When running npm run build, an error occured: Worker is not defined.
But if I copy the codes in a embedded script tag, these will be no compiling error.
How to fix this when using a script file?
minor shadowBOT
Hi @barren shoal. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave:
Astro processes and optimizes scripts that are imported into a <script> tag. However, it seems like the Worker object is not recognized when you're importing your script from a .js file.
To prevent Astro from processing your script, you can use the is:inline directive. This tells Astro to leave the <script> tag as-is in the final output HTML. The contents will not be processed, optimized, or bundled.
Here's how you can do it:
<script is:inline src="./index.js"></script>
This will render your script into the HTML exactly as written. Local imports are not resolved and will not work. If in a component, it repeats each time the component is used.
Please note that this approach skips the JavaScript processing, bundling, and optimizations that are provided by Astro. However, this may be preferred for any scripts that have already been published and minified separately from Astro.
is:inline directive (https://docs.astro.build/en/reference/directives-reference/#isinline).
barren shoal
could it be because of the default type module or if workers cannot be supported in modules ?
@minor shadow could it be because of the default type module or if workers cannot be supported in modules ?
minor shadowBOT
Let me check the knowledge base for you. One moment! :books:
Astro processes <script> tags as JavaScript modules by default. This means that the scripts are deferred and do not block rendering, which has several performance benefits. However, this could potentially cause issues with certain features, such as Web Workers, if they are not compatible with JavaScript modules.
If you're using the new Worker() constructor in your script, it's important to note that the path you provide should be relative to the current page URL, not the JavaScript module. This is because module scripts' URLs are resolved relative to the module, not the HTML file.
If you're still encountering issues, you might want to consider creating a minimal reproduction of your issue and sharing it in the Astro support threads or filing a bug report. This can help confirm whether the issue is a repeatable problem or something specific to your project or environment. For more information, you can refer to the Astro documentation on creating minimal reproductions (https://docs.astro.build/en/guides/troubleshooting/#creating-minimal-reproductions).
barren shoal
@minor shadow why would you not mention party town ? https://docs.astro.build/en/guides/integrations-guide/partytown/
minor shadowBOT
Let me check the knowledge base for you. One moment! :books:
Partytown is an Astro integration that helps improve the performance of your website by relocating resource-intensive third-party scripts into a web worker, off of the main thread. This is particularly useful for scripts related to analytics or ads, which can slow down your site.
To use Partytown in your Astro project, you can install it using the astro add command:
npx astro add partytown
# or
pnpm astro add partytown
# or
yarn astro add partytown
Or manually install it:
npm install @astrojs/partytown
# or
pnpm add @astrojs/partytown
# or
yarn add @astrojs/partytown
Then, apply the integration to your astro.config.* file using the integrations property:
import { defineConfig } from 'astro/config';
import partytown from '@astrojs/partytown';
export default defineConfig({
// ...
integrations: [partytown()],
});
You can also configure Partytown by passing a config object to the partytown() function call in astro.config.mjs.