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38. functions: Edge Middleware Overview

Last updated on Aug 05, 2025

Edge Middleware Overview

Edge Middleware is a powerful tool that allows you to execute custom logic before processing requests on your site. It runs at the edge, ensuring fast performance and personalization for your users.

Table of Contents

Edge Middleware Conceptual Overview

Edge Middleware is code that executes before a request is processed on a site. It allows you to modify the response based on the incoming request, providing personalization and optimization.

Key Features

  • Runs before cache processing.
  • Allows custom logic for rewriting, redirecting, adding headers, and more.
  • Leverages Edge Runtime, exposing APIs like FetchEvent, Response, and Request.

How to Create Edge Middleware

  1. Middleware File: Create a middleware file with the .ts extension at your project's root directory.
  2. Framework Compatibility: Use Edge Middleware with any framework.
  3. Deployment: Follow the Quickstart guide to deploy Edge Middleware templates.

Usage & Pricing

  • Quickstart: Deploy an Edge Middleware template in minutes.
  • Templates: Explore pre-built templates for A/B testing, bot protection, JWT authentication, and more.
  • Resources: Access guides, API references, usage details, and pricing information.

Limitations

  • Performance: Ensure database access is optimized using global solutions like Epycbyte KV or Blob.
  • Edge Regions: Optimize data retrieval to avoid latency issues in distant regions.

Image Optimization & Incremental Static Regeneration (ISR)

  • Use Edge Middleware for image optimization and dynamic content delivery.
  • Enable ISR to update static assets efficiently without redeploying the entire site.

Data Cache

  • Store frequently accessed data globally using Epycbyte's storage solutions.
  • Optimize cache performance to enhance request handling at the edge.

Cron Jobs & Infrastructure

  • Automate tasks like data updates or backups with cron jobs.
  • Leverage robust infrastructure for reliable and scalable operations.

Conclusion

Edge Middleware is a versatile tool for enhancing user experience through dynamic content and optimization. Start your journey today by exploring Epycbyte's Edge Middleware resources and templates.