supabase-edge-function-helpers

Elegant helpers for Supabase Edge Functions with Deno, including CORS handling and typed Supabase client presets.

Installation

denopm add @huy9k/supabase-edge-function-helpers
# or
npx jsr add @huy9k/supabase-edge-function-helpers

Usage

CORS Handling

import { corsHeaders, handleCors } from "jsr:@huy9k/supabase-edge-function-helpers";

Deno.serve(async (req) => {
  // Handle CORS preflight
  const cors = handleCors(req);
  if (cors) return cors;

  // ...your logic...
  return new Response("Hello", { headers: corsHeaders });
});

Supabase Client Presets

import { clientPresets } from "jsr:@huy9k/supabase-edge-function-helpers";

// Admin client (service role)
const admin = clientPresets.admin();

// User client (JWT)
const user = clientPresets.user("<jwt>");

// Anonymous client
const anon = clientPresets.anon();

API Reference

corsHeaders: Record<string, string>

CORS headers for Supabase Edge Functions. Use in all responses.

handleCors(req: Request): Response | null

Returns a 204 CORS preflight response if req.method === "OPTIONS", otherwise null.

clientPresets

• admin(): SupabaseClient — Uses SUPABASE_URL and SUPABASE_SERVICE_ROLE_KEY from env.
• user(token: string): SupabaseClient — Uses SUPABASE_URL, SUPABASE_ANON_KEY and sets Authorization: Bearer <token>.
• anon(): SupabaseClient — Uses SUPABASE_URL and SUPABASE_ANON_KEY.

Environment Variables

• SUPABASE_URL
• SUPABASE_SERVICE_ROLE_KEY
• SUPABASE_ANON_KEY

These must be set in your Edge Function environment.

Compatibility

• Designed for Supabase Edge Functions and Deno Deploy.
• Requires Deno runtime and access to Deno.env.
• All imports are version-pinned for JSR compatibility.

License

MIT