Sveltekit streaming?

Does Pages support streaming? https://svelte.dev/blog/streaming-snapshots-sveltekit

Streaming, snapshots, and other new features since SvelteKit 1.0

Exciting improvements in the latest version of SvelteKit

16 Replies

Vero•2y ago

Hi, I’m passing this internally to see if Pages support it Yes, @rviteri , Pages support streaming😄

Hi @veerooo are there any specifics I should take into account? On the Svelte Discord another user said they've had issues with Cloudflare. I am currently on the free plan. Hi, I just wanted to report that I tested this and it works fine on nodejs when in dev but does not work after the build is deployed to Pages (I am using the cloudflare sveltekit adapter)

Wayne•2y ago

I had issues with streaming, but resolved it by specifying node version 16.19.

Ricardo ViteriOP•2y ago

@waynemorgan did you set the NODE_VERSION environment variable to 16.19?

Wayne•2y ago

yes

Ricardo ViteriOP•2y ago

I have mine as 16 I am not sure if adding the specific version would make a difference

Wayne•2y ago

it has to be greater than 16.14

Ricardo ViteriOP•2y ago

okay let me try it and I'll report back

Wayne•2y ago

I had this message on a fresh install

Your Node version is incompatible with "/@sveltejs/kit/[email protected][email protected]".

Expected version: ^16.14 || >=18

Your Node version is incompatible with "/@sveltejs/kit/[email protected][email protected]".

Expected version: ^16.14 || >=18

Ricardo ViteriOP•2y ago

It still doesn't work for me, there must be something else with my code that breaks using pages as it works fine with my dev environment

Wayne•2y ago

what node version are you using in local dev if i use node 16.1.0 in local dev I get the following error :

failed to load config from C:\Github\SVELTE_TEST\vite.config.js
error when starting dev server:
Error [ERR_UNKNOWN_BUILTIN_MODULE]: No such built-in module: node:stream/web

failed to load config from C:\Github\SVELTE_TEST\vite.config.js
error when starting dev server:
Error [ERR_UNKNOWN_BUILTIN_MODULE]: No such built-in module: node:stream/web

did you redeploy after changing node version?

Vero•2y ago

if you need Node 18+ you can register for the beta that supports that in #Build Image Beta Testing @waynemorgan @rviteri

Ricardo ViteriOP•2y ago

Yes, I did @veerooo is there a way to view pages logs? I've always wondered how to do this. I know that workers has a debug option to see the incoming requests live but I can't find the same for Pages.

Vero•2y ago

Yesss, wrangler pages deployments tail <deployment id> Or in the dashboard, you can click on the specific deployment from your project, and go to the Functions tab

Ricardo ViteriOP•2y ago

Great! I just found it! Error: To use the new ReadableStream() constructor, enable the streams_enable_constructors feature that seems to be the error

"Error: To use the new ReadableStream() constructor, enable the streams_enable_constructors feature flag.\n    at render_response (bundledWorker-0.3160733881048463.mjs:37792:5)\n    at async render_page (bundledWorker-0.3160733881048463.mjs:38337:12)\n    at async resolve2 (bundledWorker-0.3160733881048463.mjs:38885:22)\n    at async respond (bundledWorker-0.3160733881048463.mjs:38781:22)\n    at async Object.fetch (bundledWorker-0.3160733881048463.mjs:39190:13)"

Wayne•2y ago

I found that cloning an app and building/deploying to a new page resolved an issue I had with streaming. I am not sure if its a cache problem when redeploying

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