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[Workers] Note the 405 for non-GET requests outside run_worker_first in SPA mode #34475

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[Workers] Note the 405 for non-GET requests outside run_worker_first in SPA mode #34475

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4 changes: 4 additions & 0 deletions src/content/docs/workers/static-assets/routing/single-page-application.mdx
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Expand Up @@ -91,6 +91,10 @@ export default {

</TypeScriptExample>

:::note
When `run_worker_first` is an array, a request that matches none of its patterns goes to asset serving, and in `single-page-application` mode asset serving handles every path. Asset serving only responds to `GET` and `HEAD` requests. A request with any other method, such as a `POST` from a form or an API client, to a path outside your patterns receives a `405 Method Not Allowed` response and does not invoke your Worker script. Add every path your Worker script handles to `run_worker_first`, whatever its method.
:::

You can also use `run_worker_first` to inject data into your SPA shell before it reaches the browser. For a full example using HTMLRewriter to prefetch API data and embed it in the HTML stream, refer to [SPA shell with bootstrap data](/workers/examples/spa-shell/).

## Local Development
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