Init. Map does not function and only working on backend at the moment.

node_modules/engine.io/build/transports/webtransport.js

@@ -0,0 +1,65 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.WebTransport = void 0;
+const transport_1 = require("../transport");
+const debug_1 = require("debug");
+const engine_io_parser_1 = require("engine.io-parser");
+const debug = (0, debug_1.default)("engine:webtransport");
+/**
+ * Reference: https://developer.mozilla.org/en-US/docs/Web/API/WebTransport_API
+ */
+class WebTransport extends transport_1.Transport {
+    constructor(session, stream, reader) {
+        super({ _query: { EIO: "4" } });
+        this.session = session;
+        const transformStream = (0, engine_io_parser_1.createPacketEncoderStream)();
+        transformStream.readable.pipeTo(stream.writable).catch(() => {
+            debug("the stream was closed");
+        });
+        this.writer = transformStream.writable.getWriter();
+        (async () => {
+            try {
+                while (true) {
+                    const { value, done } = await reader.read();
+                    if (done) {
+                        debug("session is closed");
+                        break;
+                    }
+                    debug("received chunk: %o", value);
+                    this.onPacket(value);
+                }
+            }
+            catch (e) {
+                debug("error while reading: %s", e.message);
+            }
+        })();
+        session.closed.then(() => this.onClose());
+        this.writable = true;
+    }
+    get name() {
+        return "webtransport";
+    }
+    get supportsFraming() {
+        return true;
+    }
+    async send(packets) {
+        this.writable = false;
+        try {
+            for (let i = 0; i < packets.length; i++) {
+                const packet = packets[i];
+                await this.writer.write(packet);
+            }
+        }
+        catch (e) {
+            debug("error while writing: %s", e.message);
+        }
+        this.writable = true;
+        this.emit("drain");
+    }
+    doClose(fn) {
+        debug("closing WebTransport session");
+        this.session.close();
+        fn && fn();
+    }
+}
+exports.WebTransport = WebTransport;