feat: `MessageChannel` and `MessagePort` (#11051)

This commit introduces support for MessageChannel and MessagePort.
MessagePorts can be transfered across other MessagePorts.

1 files changed, 11 insertions, 3 deletions

diff --git a/extensions/web/internal.d.ts b/extensions/web/internal.d.ts
index 8ab101077..06976b28b 100644
--- a/extensions/web/internal.d.ts
+++ b/extensions/web/internal.d.ts
@@ -4,9 +4,6 @@
 /// <reference lib="esnext" />
 
 declare namespace globalThis {
-  declare var TextEncoder: typeof TextEncoder;
-  declare var TextDecoder: typeof TextDecoder;
-
   declare namespace __bootstrap {
     declare var infra: {
       collectSequenceOfCodepoints(
@@ -85,5 +82,16 @@ declare namespace globalThis {
       ReadableStream: typeof ReadableStream;
       isReadableStreamDisturbed(stream: ReadableStream): boolean;
     };
+
+    declare namespace messagePort {
+      declare type Transferable = {
+        kind: "messagePort";
+        data: number;
+      };
+      declare interface MessageData {
+        data: Uint8Array;
+        transferables: Transferable[];
+      }
+    }
   }
 }