Nitro: Provide better API for client-only rendering when using SSR

[brandonroberts]

Which scope/s are relevant/related to the feature request?

vite-plugin-nitro

Information

There was a use case brought up in Discord about supporting client-only sections of the app. As an example, every URL under the /admin path should not go through SSR, but should just return the index.html.

Describe any alternatives/workarounds you're currently using

Use the main.server.ts to eagerly return the document for certain paths

export default async function render(url: string, document: string) {
  // client-render any admin URLs
  if(url.includes('admin')) {
    return Promise.resolve(document);
  }

  // Server-render anything that's not prerendered
  const html = await renderApplication(bootstrap, {
    document,
    url,
  });

  return html;
}

I would be willing to submit a PR to fix this issue

• Yes
• No

[brandonroberts]

Closed in #1011 where disabling SSR will still produce the same output but render the app only on the client-side.