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- [Unsupported APIs](#unsupportedapis)[](/docs/functions/runtimes/edge.md): The Edge runtime has some restrictions including Some Node.js APIs other than the ones listed above are not supported. For example, you can't read or
- [Other guidelines](#otherguidelines)[](/docs/limits/fair-use-guidelines.md): Middleware with the edge runtime configured CPU Limits Middleware with the edge runtime configured can use no more than 50ms of CPU time on average.
- [Deploying middleware at the Edge](#deployingmiddlewareattheedge)[](/docs/frameworks/frontend/astro.md): You can deploy Astro's middleware at the Edge, giving you access to data in the RequestContext and Request, and enabling you to use Vercel's Routing
- [Using Edge Config with LaunchDarkly](/docs/edge-config/edge-config-integrations/launchdarkly-edge-config.md): the middleware on the dashboard route matcher'/homepage', }; export default function middleware(requestRequest)Response { await
- [Edge Config Limits and pricing](/docs/edge-config/edge-config-limits.md): An Edge Config is a global data store that enables experimentation with feature flags, A/B testing, critical redirects, and IP blocking. It enables

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