| 1 | // A CommonJS dependency that requires Node builtins at module scope — the |
| 2 | // same shape as `pg` (#880). Module evaluation happens during Cloudflare's |
| 3 | // startup validation, which is exactly where the unconverted throwing |
| 4 | // `require` fallback used to crash the Worker. |
| 5 | const { EventEmitter } = require("events"); |
| 6 | const util = require("node:util"); |
| 7 | |
| 8 | const emitter = new EventEmitter(); |
| 9 | |
| 10 | // Takes its value from the request so the bundler cannot constant-fold the |
| 11 | // round-trip away at build time. |
| 12 | function roundTrip(value) { |
| 13 | let received = ""; |
| 14 | emitter.once("ping", (v) => { |
| 15 | received = v; |
| 16 | }); |
| 17 | emitter.emit("ping", value); |
| 18 | return util.format("require-node-builtins:%s", received); |
| 19 | } |
| 20 | |
| 21 | module.exports = { roundTrip }; |