Edge functions with Supabase

2 min readApr 8, 2023

Edge functions are a powerful feature offered by Supabase, a popular open-source Backend-as-a-Service (BaaS) provider. Edge functions enable developers to write and deploy serverless functions that run on the edge of the network, closer to the end-user, and thus reducing latency and improving performance.

Edge functions can be used for a variety of use cases, such as caching responses, implementing security policies, and customizing responses based on user preferences or device information. In addition, edge functions can also be used to integrate third-party APIs or services into your application without exposing your API key or secret to the client-side.

To use edge functions with Supabase, you first need to create a new function by navigating to the “Edge Functions” section in your Supabase project dashboard. Then, you can write your function code in your preferred programming language (Node.js or Rust). Supabase provides a set of templates to get you started quickly and an online code editor that allows you to test your function before deploying it.

Once you have written and tested your function, you can deploy it to the edge network by selecting the region where you want to deploy it. Supabase currently supports three regions: United States, Europe, and Asia. After deploying your function, you can access it via a unique URL that Supabase provides, which you can then integrate into your application or API endpoint.

In conclusion, edge functions are a powerful and flexible feature offered by Supabase that enables developers to write and deploy serverless functions closer to the end-user, improving performance and reducing latency. With Supabase’s intuitive interface and online code editor, creating and deploying edge functions is quick and easy, allowing you to focus on building your application’s core functionality.

Guillaume Duhan