Target edge runtime conditionally

[benmerckx]

Describe the feature you'd like to request

Api routes configured with {runtime: 'experimental-edge'} target "browser" exports during bundling.
Libraries that use conditional exports might want to export different code for server and client. Currently it seems there's no way to target the edge api routes specifically. For users this can result in build errors such as Dynamic Code Evaluation (e. g. 'eval', 'new Function', 'WebAssembly.compile') not allowed in Edge Runtime for unwanted browser specific code.

Cloudflare workers via wrangler have the option of targetting the "worker" export.

Describe the solution you'd like

Provide a target which enables libraries to conditionally provide exports for the edge runtime. Potentially re-use the "worker" condition or a more fitting and unique condition.

{
  "exports": {
    // Target edge runtime
    "edge": "./server.js",
    // Actual browsers
    "browser": "./client.js",
    // Everything else
    "default": "./server.js"
  }
}

Describe alternatives you've considered

Don't see other options.