T
TanStack•4mo ago
plain-purple

How to add custom unenv polyfills for cloudflare-module

I struggle using @aws-sdk/client-s3 with cloudflare-module preset. I keep getting the error Error: [unenv] fs.readFile is not implemented yet! at runtime, when I try to upload to/download from an S3 bucket or pre-sign URLs. Does anyone have similar issues when deploying to Cloudflare? Or now how I can add custom polyfills (unenv/node/fs in my case) on top of the default ones? I already tried the following: * Switching from cloudflare-module to cloudflare-pages following the TanStack Start docs for React (I'm using SolidJs) * Aliasing fs and node:fs following the Cloudflare docs: 
// fs-polyfill.ts
export * from "unenv/node/fs";
// fs-polyfill.ts
export * from "unenv/node/fs";
// wrangler.jsonc
{
  // ...
  "alias": {
    "fs": "./fs-polyfill",
    "node:fs": "./fs-polyfill"
  }
}
// wrangler.jsonc
{
  // ...
  "alias": {
    "fs": "./fs-polyfill",
    "node:fs": "./fs-polyfill"
  }
}
* Aliasing fs and node:fs via resolve.alias in Vite: 
// vite.config.ts
export default defineConfig({
  // ...
  resolve: {
    alias: {
      fs: "unenv/node/fs",
      "node:fs": "unenv/node/fs",
    },
  },
});
// vite.config.ts
export default defineConfig({
  // ...
  resolve: {
    alias: {
      fs: "unenv/node/fs",
      "node:fs": "unenv/node/fs",
    },
  },
});
Unfortunately, nothing worked so far, always getting the same error at runtime.
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