[✨] Opt-out streaming

[GrandSchtroumpf]

Is your feature request related to a problem?

A lot of issues in Qwik seems to be related to streaming because we cannot update items that have been already rendered and sent to the client.
I think streaming is a good feature, but it comes at a high price. And sometime we don't need streaming at all, like with SSG.

Streaming is currently preventing us to update context at render time, which has a huge impact on how we built the app:

• limiting head update to routeLoader$ (which also come with side effects) [🐞] Document head/title set from inside a component does not work in SSR qwik#4712
• designing components in a specific matter [🐞] context change in useTask$ not rendering qwik#4383
• cannot lazy query some data based on amount of listeners [🐞] Serializing dirty watch warning qwik#2715 (comment)

Describe the solution you'd like

The function renderToString should not use renderToStream under-the-hood.
Renderer should wait for DOM to be stable with a timeout to avoid infinity loop a little bit and angular universal is working.

Describe alternatives you've considered

Not updating the context at render time

Additional context

No response

[wmertens]

I think this can't be done easily, because the SSR code assumes that the components will not be rerendered. I might be wrong.

If it was easy to support it would make an interesting feature, although I think all the examples you give are better solved in other ways.

[wmertens]

@GrandSchtroumpf I'm looking at the SSR code and what you want would require a complete rewrite, so it would be extremely unlikely.

[wmertens]

I just realized that opt-out streaming is possible by running regular Qwik on JSDom on the server, and then pausing the container. That would be possible as a standalone package.

[GrandSchtroumpf]

That would be amazing ! Qwik would work the same in web & server (modulo differences between DOM & JSDom).
Do you have any idea how to achieve it ? I assume it involve more than just :

const { window } = new JSDOM('');
render(window.document, <Root />, opts)

[wmertens]

Seems to me that you have to await the result and then clean up the subscriptions, and then you can call root.pause() and read the outerHtml to get the container.

https://qwik.builder.io/api/qwik/#render

It wouldn't be efficient but for generating SSG that's ok

[gioboa]

We moved this issue to qwik-evolution repo to create a RFC discussion for this.
Here is our Qwik RFC process thanks.