Cloudflare Developers•6mo ago

Access bindings in dev

I'm following this tutorial: https://developers.cloudflare.com/pages/framework-guides/deploy-a-svelte-site/ And I've also tried the Qwik tutorial. I'm running the dev server using npm run pages:dev so using wrangler. In the case of Qwik, in the console I can see the message:

Your worker has access to the following bindings:
- D1 Databases:
  - DB: ...

Your worker has access to the following bindings:
- D1 Databases:
  - DB: ...

But the context is not provided to the request handler. In the case of Svelte,

export async function post(context) {
  const env = context.platform.env // This is undefined
}

export async function post(context) {
  const env = context.platform.env // This is undefined
}

The SvelteKit docs do say "platform.env is only available in the final build and not in dev mode." But I'm not sure how anyone is doing development without the bindings. Just build every time I want to test? Am I missing something? Anyone have any suggestions or workaround?

Deploy a Svelte site · Cloudflare Pages docs

Svelte is an increasingly popular, open-source framework for building user interfaces and web applications. Unlike most frameworks, Svelte is …

SvelteKit docs

Cloudflare Pages • SvelteKit documentation

4 Replies

bdematt•6mo ago

Can anyone just confirm if I'm right in thinking that bindings are not available when running dev?

axel•2mo ago

bump

IEatBeans•2mo ago

GitHub

Do not deprecate wrangler's proxy feature, e.g. `wrangler pages dev...

Edit: I edited the issue title since this thread has been evolved about how to inject CF env vars into a hot reloading dev server, the actual issue is further down: #5315 (comment) Which Cloudflare...

jculveyhouse•2mo ago

Bindings should work in dev out of the box. In late January (not sure of the specific version but can look it up if needed) Svelte changed the Cloudflare adapter to use getBindingsProxy which will automatically emulate any bindings defined in your wrangler.toml when running vite dev in a svelte project for reference, here's the PR: https://github.com/sveltejs/kit/pull/11732/files#diff-55dd33c380314b0ebda94b3dea7190b010f2fb9824c7303ecf7d994d7df04ac1R147 I just tried this on a fresh project with npm create cloudflare@latest -- --framework svelte and it seems to be working

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Access bindings in dev