Updated the files.

my-app/node_modules/engine.io-parser/LICENSE

@@ -0,0 +1,22 @@
+(The MIT License)
+
+Copyright (c) 2016 Guillermo Rauch (@rauchg)
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+'Software'), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

my-app/node_modules/engine.io-parser/Readme.md

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+
+# engine.io-parser
+
+[![Build Status](https://github.com/socketio/engine.io-parser/workflows/CI/badge.svg?branch=main)](https://github.com/socketio/engine.io-parser/actions)
+[![NPM version](https://badge.fury.io/js/engine.io-parser.svg)](https://npmjs.com/package/engine.io-parser)
+
+This is the JavaScript parser for the engine.io protocol encoding,
+shared by both
+[engine.io-client](https://github.com/socketio/engine.io-client) and
+[engine.io](https://github.com/socketio/engine.io).
+
+## How to use
+
+### Standalone
+
+The parser can encode/decode packets, payloads, and payloads as binary
+with the following methods: `encodePacket`, `decodePacket`, `encodePayload`,
+`decodePayload`.
+
+Example:
+
+```js
+const parser = require("engine.io-parser");
+const data = Buffer.from([ 1, 2, 3, 4 ]);
+
+parser.encodePacket({ type: "message", data }, encoded => {
+  const decodedData = parser.decodePacket(encoded); // decodedData === data
+});
+```
+
+### With browserify
+
+Engine.IO Parser is a commonjs module, which means you can include it by using
+`require` on the browser and package using [browserify](http://browserify.org/):
+
+1. install the parser package
+
+    ```shell
+    npm install engine.io-parser
+    ```
+
+1. write your app code
+
+    ```js
+    const parser = require("engine.io-parser");
+
+    const testBuffer = new Int8Array(10);
+    for (let i = 0; i < testBuffer.length; i++) testBuffer[i] = i;
+
+    const packets = [{ type: "message", data: testBuffer.buffer }, { type: "message", data: "hello" }];
+
+    parser.encodePayload(packets, encoded => {
+      parser.decodePayload(encoded,
+        (packet, index, total) => {
+          const isLast = index + 1 == total;
+          if (!isLast) {
+            const buffer = new Int8Array(packet.data); // testBuffer
+          } else {
+            const message = packet.data; // "hello"
+          }
+        });
+    });
+    ```
+
+1. build your app bundle
+
+    ```bash
+    $ browserify app.js > bundle.js
+    ```
+
+1. include on your page
+
+    ```html
+    <script src="/path/to/bundle.js"></script>
+    ```
+
+## Features
+
+- Runs on browser and node.js seamlessly
+- Runs inside HTML5 WebWorker
+- Can encode and decode packets
+  - Encodes from/to ArrayBuffer or Blob when in browser, and Buffer or ArrayBuffer in Node
+
+## API
+
+Note: `cb(type)` means the type is a callback function that contains a parameter of type `type` when called.
+
+### Node
+
+- `encodePacket`
+    - Encodes a packet.
+    - **Parameters**
+      - `Object`: the packet to encode, has `type` and `data`.
+        - `data`: can be a `String`, `Number`, `Buffer`, `ArrayBuffer`
+      - `Boolean`: binary support
+      - `Function`: callback, returns the encoded packet (`cb(String)`)
+- `decodePacket`
+    - Decodes a packet. Data also available as an ArrayBuffer if requested.
+    - Returns data as `String` or (`Blob` on browser, `ArrayBuffer` on Node)
+    - **Parameters**
+      - `String` | `ArrayBuffer`: the packet to decode, has `type` and `data`
+      - `String`: optional, the binary type
+
+- `encodePayload`
+    - Encodes multiple messages (payload).
+    - If any contents are binary, they will be encoded as base64 strings. Base64
+      encoded strings are marked with a b before the length specifier
+    - **Parameters**
+      - `Array`: an array of packets
+      - `Function`: callback, returns the encoded payload (`cb(String)`)
+- `decodePayload`
+    - Decodes data when a payload is maybe expected. Possible binary contents are
+      decoded from their base64 representation.
+    - **Parameters**
+      - `String`: the payload
+      - `Function`: callback, returns (cb(`Object`: packet, `Number`:packet index, `Number`:packet total))
+
+## Tests
+
+Standalone tests can be run with `npm test` which will run the node.js tests.
+
+Browser tests are run using [zuul](https://github.com/defunctzombie/zuul).
+(You must have zuul setup with a saucelabs account.)
+
+You can run the tests locally using the following command:
+
+```
+npm run test:browser
+```
+
+## Support
+
+The support channels for `engine.io-parser` are the same as `socket.io`:
+  - irc.freenode.net **#socket.io**
+  - [Github Discussions](https://github.com/socketio/socket.io/discussions)
+  - [Website](https://socket.io)
+
+## Development
+
+To contribute patches, run tests or benchmarks, make sure to clone the
+repository:
+
+```bash
+git clone git://github.com/socketio/engine.io-parser.git
+```
+
+Then:
+
+```bash
+cd engine.io-parser
+npm ci
+```
+
+See the `Tests` section above for how to run tests before submitting any patches.
+
+## License
+
+MIT

my-app/node_modules/engine.io-parser/build/cjs/commons.d.ts

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+declare const PACKET_TYPES: any;
+declare const PACKET_TYPES_REVERSE: any;
+declare const ERROR_PACKET: Packet;
+export { PACKET_TYPES, PACKET_TYPES_REVERSE, ERROR_PACKET };
+export declare type PacketType = "open" | "close" | "ping" | "pong" | "message" | "upgrade" | "noop" | "error";
+export declare type RawData = any;
+export interface Packet {
+    type: PacketType;
+    options?: {
+        compress: boolean;
+    };
+    data?: RawData;
+}
+export declare type BinaryType = "nodebuffer" | "arraybuffer" | "blob";

my-app/node_modules/engine.io-parser/build/cjs/commons.js

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+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.ERROR_PACKET = exports.PACKET_TYPES_REVERSE = exports.PACKET_TYPES = void 0;
+const PACKET_TYPES = Object.create(null); // no Map = no polyfill
+exports.PACKET_TYPES = PACKET_TYPES;
+PACKET_TYPES["open"] = "0";
+PACKET_TYPES["close"] = "1";
+PACKET_TYPES["ping"] = "2";
+PACKET_TYPES["pong"] = "3";
+PACKET_TYPES["message"] = "4";
+PACKET_TYPES["upgrade"] = "5";
+PACKET_TYPES["noop"] = "6";
+const PACKET_TYPES_REVERSE = Object.create(null);
+exports.PACKET_TYPES_REVERSE = PACKET_TYPES_REVERSE;
+Object.keys(PACKET_TYPES).forEach((key) => {
+    PACKET_TYPES_REVERSE[PACKET_TYPES[key]] = key;
+});
+const ERROR_PACKET = { type: "error", data: "parser error" };
+exports.ERROR_PACKET = ERROR_PACKET;

my-app/node_modules/engine.io-parser/build/cjs/contrib/base64-arraybuffer.d.ts

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+export declare const encode: (arraybuffer: ArrayBuffer) => string;
+export declare const decode: (base64: string) => ArrayBuffer;

my-app/node_modules/engine.io-parser/build/cjs/contrib/base64-arraybuffer.js

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+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.decode = exports.encode = void 0;
+// imported from https://github.com/socketio/base64-arraybuffer
+const chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
+// Use a lookup table to find the index.
+const lookup = typeof Uint8Array === 'undefined' ? [] : new Uint8Array(256);
+for (let i = 0; i < chars.length; i++) {
+    lookup[chars.charCodeAt(i)] = i;
+}
+const encode = (arraybuffer) => {
+    let bytes = new Uint8Array(arraybuffer), i, len = bytes.length, base64 = '';
+    for (i = 0; i < len; i += 3) {
+        base64 += chars[bytes[i] >> 2];
+        base64 += chars[((bytes[i] & 3) << 4) | (bytes[i + 1] >> 4)];
+        base64 += chars[((bytes[i + 1] & 15) << 2) | (bytes[i + 2] >> 6)];
+        base64 += chars[bytes[i + 2] & 63];
+    }
+    if (len % 3 === 2) {
+        base64 = base64.substring(0, base64.length - 1) + '=';
+    }
+    else if (len % 3 === 1) {
+        base64 = base64.substring(0, base64.length - 2) + '==';
+    }
+    return base64;
+};
+exports.encode = encode;
+const decode = (base64) => {
+    let bufferLength = base64.length * 0.75, len = base64.length, i, p = 0, encoded1, encoded2, encoded3, encoded4;
+    if (base64[base64.length - 1] === '=') {
+        bufferLength--;
+        if (base64[base64.length - 2] === '=') {
+            bufferLength--;
+        }
+    }
+    const arraybuffer = new ArrayBuffer(bufferLength), bytes = new Uint8Array(arraybuffer);
+    for (i = 0; i < len; i += 4) {
+        encoded1 = lookup[base64.charCodeAt(i)];
+        encoded2 = lookup[base64.charCodeAt(i + 1)];
+        encoded3 = lookup[base64.charCodeAt(i + 2)];
+        encoded4 = lookup[base64.charCodeAt(i + 3)];
+        bytes[p++] = (encoded1 << 2) | (encoded2 >> 4);
+        bytes[p++] = ((encoded2 & 15) << 4) | (encoded3 >> 2);
+        bytes[p++] = ((encoded3 & 3) << 6) | (encoded4 & 63);
+    }
+    return arraybuffer;
+};
+exports.decode = decode;

my-app/node_modules/engine.io-parser/build/cjs/decodePacket.browser.d.ts

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+import { Packet, BinaryType, RawData } from "./commons.js";
+export declare const decodePacket: (encodedPacket: RawData, binaryType?: BinaryType) => Packet;

my-app/node_modules/engine.io-parser/build/cjs/decodePacket.browser.js

@@ -0,0 +1,66 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.decodePacket = void 0;
+const commons_js_1 = require("./commons.js");
+const base64_arraybuffer_js_1 = require("./contrib/base64-arraybuffer.js");
+const withNativeArrayBuffer = typeof ArrayBuffer === "function";
+const decodePacket = (encodedPacket, binaryType) => {
+    if (typeof encodedPacket !== "string") {
+        return {
+            type: "message",
+            data: mapBinary(encodedPacket, binaryType),
+        };
+    }
+    const type = encodedPacket.charAt(0);
+    if (type === "b") {
+        return {
+            type: "message",
+            data: decodeBase64Packet(encodedPacket.substring(1), binaryType),
+        };
+    }
+    const packetType = commons_js_1.PACKET_TYPES_REVERSE[type];
+    if (!packetType) {
+        return commons_js_1.ERROR_PACKET;
+    }
+    return encodedPacket.length > 1
+        ? {
+            type: commons_js_1.PACKET_TYPES_REVERSE[type],
+            data: encodedPacket.substring(1),
+        }
+        : {
+            type: commons_js_1.PACKET_TYPES_REVERSE[type],
+        };
+};
+exports.decodePacket = decodePacket;
+const decodeBase64Packet = (data, binaryType) => {
+    if (withNativeArrayBuffer) {
+        const decoded = (0, base64_arraybuffer_js_1.decode)(data);
+        return mapBinary(decoded, binaryType);
+    }
+    else {
+        return { base64: true, data }; // fallback for old browsers
+    }
+};
+const mapBinary = (data, binaryType) => {
+    switch (binaryType) {
+        case "blob":
+            if (data instanceof Blob) {
+                // from WebSocket + binaryType "blob"
+                return data;
+            }
+            else {
+                // from HTTP long-polling or WebTransport
+                return new Blob([data]);
+            }
+        case "arraybuffer":
+        default:
+            if (data instanceof ArrayBuffer) {
+                // from HTTP long-polling (base64) or WebSocket + binaryType "arraybuffer"
+                return data;
+            }
+            else {
+                // from WebTransport (Uint8Array)
+                return data.buffer;
+            }
+    }
+};

my-app/node_modules/engine.io-parser/build/cjs/decodePacket.d.ts

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+import { Packet, BinaryType, RawData } from "./commons.js";
+export declare const decodePacket: (encodedPacket: RawData, binaryType?: BinaryType) => Packet;

my-app/node_modules/engine.io-parser/build/cjs/decodePacket.js

@@ -0,0 +1,59 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.decodePacket = void 0;
+const commons_js_1 = require("./commons.js");
+const decodePacket = (encodedPacket, binaryType) => {
+    if (typeof encodedPacket !== "string") {
+        return {
+            type: "message",
+            data: mapBinary(encodedPacket, binaryType),
+        };
+    }
+    const type = encodedPacket.charAt(0);
+    if (type === "b") {
+        const buffer = Buffer.from(encodedPacket.substring(1), "base64");
+        return {
+            type: "message",
+            data: mapBinary(buffer, binaryType),
+        };
+    }
+    if (!commons_js_1.PACKET_TYPES_REVERSE[type]) {
+        return commons_js_1.ERROR_PACKET;
+    }
+    return encodedPacket.length > 1
+        ? {
+            type: commons_js_1.PACKET_TYPES_REVERSE[type],
+            data: encodedPacket.substring(1),
+        }
+        : {
+            type: commons_js_1.PACKET_TYPES_REVERSE[type],
+        };
+};
+exports.decodePacket = decodePacket;
+const mapBinary = (data, binaryType) => {
+    switch (binaryType) {
+        case "arraybuffer":
+            if (data instanceof ArrayBuffer) {
+                // from WebSocket & binaryType "arraybuffer"
+                return data;
+            }
+            else if (Buffer.isBuffer(data)) {
+                // from HTTP long-polling
+                return data.buffer.slice(data.byteOffset, data.byteOffset + data.byteLength);
+            }
+            else {
+                // from WebTransport (Uint8Array)
+                return data.buffer;
+            }
+        case "nodebuffer":
+        default:
+            if (Buffer.isBuffer(data)) {
+                // from HTTP long-polling or WebSocket & binaryType "nodebuffer" (default)
+                return data;
+            }
+            else {
+                // from WebTransport (Uint8Array)
+                return Buffer.from(data);
+            }
+    }
+};

my-app/node_modules/engine.io-parser/build/cjs/encodePacket.browser.d.ts

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+import { Packet, RawData } from "./commons.js";
+declare const encodePacket: ({ type, data }: Packet, supportsBinary: boolean, callback: (encodedPacket: RawData) => void) => void;
+export declare function encodePacketToBinary(packet: Packet, callback: (encodedPacket: RawData) => void): void | Promise<void>;
+export { encodePacket };

my-app/node_modules/engine.io-parser/build/cjs/encodePacket.browser.js

@@ -0,0 +1,72 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.encodePacket = exports.encodePacketToBinary = void 0;
+const commons_js_1 = require("./commons.js");
+const withNativeBlob = typeof Blob === "function" ||
+    (typeof Blob !== "undefined" &&
+        Object.prototype.toString.call(Blob) === "[object BlobConstructor]");
+const withNativeArrayBuffer = typeof ArrayBuffer === "function";
+// ArrayBuffer.isView method is not defined in IE10
+const isView = (obj) => {
+    return typeof ArrayBuffer.isView === "function"
+        ? ArrayBuffer.isView(obj)
+        : obj && obj.buffer instanceof ArrayBuffer;
+};
+const encodePacket = ({ type, data }, supportsBinary, callback) => {
+    if (withNativeBlob && data instanceof Blob) {
+        if (supportsBinary) {
+            return callback(data);
+        }
+        else {
+            return encodeBlobAsBase64(data, callback);
+        }
+    }
+    else if (withNativeArrayBuffer &&
+        (data instanceof ArrayBuffer || isView(data))) {
+        if (supportsBinary) {
+            return callback(data);
+        }
+        else {
+            return encodeBlobAsBase64(new Blob([data]), callback);
+        }
+    }
+    // plain string
+    return callback(commons_js_1.PACKET_TYPES[type] + (data || ""));
+};
+exports.encodePacket = encodePacket;
+const encodeBlobAsBase64 = (data, callback) => {
+    const fileReader = new FileReader();
+    fileReader.onload = function () {
+        const content = fileReader.result.split(",")[1];
+        callback("b" + (content || ""));
+    };
+    return fileReader.readAsDataURL(data);
+};
+function toArray(data) {
+    if (data instanceof Uint8Array) {
+        return data;
+    }
+    else if (data instanceof ArrayBuffer) {
+        return new Uint8Array(data);
+    }
+    else {
+        return new Uint8Array(data.buffer, data.byteOffset, data.byteLength);
+    }
+}
+let TEXT_ENCODER;
+function encodePacketToBinary(packet, callback) {
+    if (withNativeBlob && packet.data instanceof Blob) {
+        return packet.data.arrayBuffer().then(toArray).then(callback);
+    }
+    else if (withNativeArrayBuffer &&
+        (packet.data instanceof ArrayBuffer || isView(packet.data))) {
+        return callback(toArray(packet.data));
+    }
+    encodePacket(packet, false, (encoded) => {
+        if (!TEXT_ENCODER) {
+            TEXT_ENCODER = new TextEncoder();
+        }
+        callback(TEXT_ENCODER.encode(encoded));
+    });
+}
+exports.encodePacketToBinary = encodePacketToBinary;

my-app/node_modules/engine.io-parser/build/cjs/encodePacket.d.ts

@@ -0,0 +1,3 @@
+import { Packet, RawData } from "./commons.js";
+export declare const encodePacket: ({ type, data }: Packet, supportsBinary: boolean, callback: (encodedPacket: RawData) => void) => void;
+export declare function encodePacketToBinary(packet: Packet, callback: (encodedPacket: RawData) => void): void;

my-app/node_modules/engine.io-parser/build/cjs/encodePacket.js

@@ -0,0 +1,38 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.encodePacketToBinary = exports.encodePacket = void 0;
+const commons_js_1 = require("./commons.js");
+const encodePacket = ({ type, data }, supportsBinary, callback) => {
+    if (data instanceof ArrayBuffer || ArrayBuffer.isView(data)) {
+        return callback(supportsBinary ? data : "b" + toBuffer(data, true).toString("base64"));
+    }
+    // plain string
+    return callback(commons_js_1.PACKET_TYPES[type] + (data || ""));
+};
+exports.encodePacket = encodePacket;
+const toBuffer = (data, forceBufferConversion) => {
+    if (Buffer.isBuffer(data) ||
+        (data instanceof Uint8Array && !forceBufferConversion)) {
+        return data;
+    }
+    else if (data instanceof ArrayBuffer) {
+        return Buffer.from(data);
+    }
+    else {
+        return Buffer.from(data.buffer, data.byteOffset, data.byteLength);
+    }
+};
+let TEXT_ENCODER;
+function encodePacketToBinary(packet, callback) {
+    if (packet.data instanceof ArrayBuffer || ArrayBuffer.isView(packet.data)) {
+        return callback(toBuffer(packet.data, false));
+    }
+    (0, exports.encodePacket)(packet, true, (encoded) => {
+        if (!TEXT_ENCODER) {
+            // lazily created for compatibility with Node.js 10
+            TEXT_ENCODER = new TextEncoder();
+        }
+        callback(TEXT_ENCODER.encode(encoded));
+    });
+}
+exports.encodePacketToBinary = encodePacketToBinary;

my-app/node_modules/engine.io-parser/build/cjs/index.d.ts

@@ -0,0 +1,11 @@
+/// <reference types="node" />
+import { encodePacket } from "./encodePacket.js";
+import { decodePacket } from "./decodePacket.js";
+import { Packet, PacketType, RawData, BinaryType } from "./commons.js";
+import type { TransformStream } from "node:stream/web";
+declare const encodePayload: (packets: Packet[], callback: (encodedPayload: string) => void) => void;
+declare const decodePayload: (encodedPayload: string, binaryType?: BinaryType) => Packet[];
+export declare function createPacketEncoderStream(): TransformStream<Packet, any>;
+export declare function createPacketDecoderStream(maxPayload: number, binaryType: BinaryType): TransformStream<Uint8Array, any>;
+export declare const protocol = 4;
+export { encodePacket, encodePayload, decodePacket, decodePayload, Packet, PacketType, RawData, BinaryType, };

my-app/node_modules/engine.io-parser/build/cjs/index.js

@@ -0,0 +1,166 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.decodePayload = exports.decodePacket = exports.encodePayload = exports.encodePacket = exports.protocol = exports.createPacketDecoderStream = exports.createPacketEncoderStream = void 0;
+const encodePacket_js_1 = require("./encodePacket.js");
+Object.defineProperty(exports, "encodePacket", { enumerable: true, get: function () { return encodePacket_js_1.encodePacket; } });
+const decodePacket_js_1 = require("./decodePacket.js");
+Object.defineProperty(exports, "decodePacket", { enumerable: true, get: function () { return decodePacket_js_1.decodePacket; } });
+const commons_js_1 = require("./commons.js");
+const SEPARATOR = String.fromCharCode(30); // see https://en.wikipedia.org/wiki/Delimiter#ASCII_delimited_text
+const encodePayload = (packets, callback) => {
+    // some packets may be added to the array while encoding, so the initial length must be saved
+    const length = packets.length;
+    const encodedPackets = new Array(length);
+    let count = 0;
+    packets.forEach((packet, i) => {
+        // force base64 encoding for binary packets
+        (0, encodePacket_js_1.encodePacket)(packet, false, (encodedPacket) => {
+            encodedPackets[i] = encodedPacket;
+            if (++count === length) {
+                callback(encodedPackets.join(SEPARATOR));
+            }
+        });
+    });
+};
+exports.encodePayload = encodePayload;
+const decodePayload = (encodedPayload, binaryType) => {
+    const encodedPackets = encodedPayload.split(SEPARATOR);
+    const packets = [];
+    for (let i = 0; i < encodedPackets.length; i++) {
+        const decodedPacket = (0, decodePacket_js_1.decodePacket)(encodedPackets[i], binaryType);
+        packets.push(decodedPacket);
+        if (decodedPacket.type === "error") {
+            break;
+        }
+    }
+    return packets;
+};
+exports.decodePayload = decodePayload;
+function createPacketEncoderStream() {
+    // @ts-expect-error
+    return new TransformStream({
+        transform(packet, controller) {
+            (0, encodePacket_js_1.encodePacketToBinary)(packet, (encodedPacket) => {
+                const payloadLength = encodedPacket.length;
+                let header;
+                // inspired by the WebSocket format: https://developer.mozilla.org/en-US/docs/Web/API/WebSockets_API/Writing_WebSocket_servers#decoding_payload_length
+                if (payloadLength < 126) {
+                    header = new Uint8Array(1);
+                    new DataView(header.buffer).setUint8(0, payloadLength);
+                }
+                else if (payloadLength < 65536) {
+                    header = new Uint8Array(3);
+                    const view = new DataView(header.buffer);
+                    view.setUint8(0, 126);
+                    view.setUint16(1, payloadLength);
+                }
+                else {
+                    header = new Uint8Array(9);
+                    const view = new DataView(header.buffer);
+                    view.setUint8(0, 127);
+                    view.setBigUint64(1, BigInt(payloadLength));
+                }
+                // first bit indicates whether the payload is plain text (0) or binary (1)
+                if (packet.data && typeof packet.data !== "string") {
+                    header[0] |= 0x80;
+                }
+                controller.enqueue(header);
+                controller.enqueue(encodedPacket);
+            });
+        },
+    });
+}
+exports.createPacketEncoderStream = createPacketEncoderStream;
+let TEXT_DECODER;
+function totalLength(chunks) {
+    return chunks.reduce((acc, chunk) => acc + chunk.length, 0);
+}
+function concatChunks(chunks, size) {
+    if (chunks[0].length === size) {
+        return chunks.shift();
+    }
+    const buffer = new Uint8Array(size);
+    let j = 0;
+    for (let i = 0; i < size; i++) {
+        buffer[i] = chunks[0][j++];
+        if (j === chunks[0].length) {
+            chunks.shift();
+            j = 0;
+        }
+    }
+    if (chunks.length && j < chunks[0].length) {
+        chunks[0] = chunks[0].slice(j);
+    }
+    return buffer;
+}
+function createPacketDecoderStream(maxPayload, binaryType) {
+    if (!TEXT_DECODER) {
+        TEXT_DECODER = new TextDecoder();
+    }
+    const chunks = [];
+    let state = 0 /* READ_HEADER */;
+    let expectedLength = -1;
+    let isBinary = false;
+    // @ts-expect-error
+    return new TransformStream({
+        transform(chunk, controller) {
+            chunks.push(chunk);
+            while (true) {
+                if (state === 0 /* READ_HEADER */) {
+                    if (totalLength(chunks) < 1) {
+                        break;
+                    }
+                    const header = concatChunks(chunks, 1);
+                    isBinary = (header[0] & 0x80) === 0x80;
+                    expectedLength = header[0] & 0x7f;
+                    if (expectedLength < 126) {
+                        state = 3 /* READ_PAYLOAD */;
+                    }
+                    else if (expectedLength === 126) {
+                        state = 1 /* READ_EXTENDED_LENGTH_16 */;
+                    }
+                    else {
+                        state = 2 /* READ_EXTENDED_LENGTH_64 */;
+                    }
+                }
+                else if (state === 1 /* READ_EXTENDED_LENGTH_16 */) {
+                    if (totalLength(chunks) < 2) {
+                        break;
+                    }
+                    const headerArray = concatChunks(chunks, 2);
+                    expectedLength = new DataView(headerArray.buffer, headerArray.byteOffset, headerArray.length).getUint16(0);
+                    state = 3 /* READ_PAYLOAD */;
+                }
+                else if (state === 2 /* READ_EXTENDED_LENGTH_64 */) {
+                    if (totalLength(chunks) < 8) {
+                        break;
+                    }
+                    const headerArray = concatChunks(chunks, 8);
+                    const view = new DataView(headerArray.buffer, headerArray.byteOffset, headerArray.length);
+                    const n = view.getUint32(0);
+                    if (n > Math.pow(2, 53 - 32) - 1) {
+                        // the maximum safe integer in JavaScript is 2^53 - 1
+                        controller.enqueue(commons_js_1.ERROR_PACKET);
+                        break;
+                    }
+                    expectedLength = n * Math.pow(2, 32) + view.getUint32(4);
+                    state = 3 /* READ_PAYLOAD */;
+                }
+                else {
+                    if (totalLength(chunks) < expectedLength) {
+                        break;
+                    }
+                    const data = concatChunks(chunks, expectedLength);
+                    controller.enqueue((0, decodePacket_js_1.decodePacket)(isBinary ? data : TEXT_DECODER.decode(data), binaryType));
+                    state = 0 /* READ_HEADER */;
+                }
+                if (expectedLength === 0 || expectedLength > maxPayload) {
+                    controller.enqueue(commons_js_1.ERROR_PACKET);
+                    break;
+                }
+            }
+        },
+    });
+}
+exports.createPacketDecoderStream = createPacketDecoderStream;
+exports.protocol = 4;

my-app/node_modules/engine.io-parser/build/cjs/package.json

@@ -0,0 +1,8 @@
+{
+  "name": "engine.io-parser",
+  "type": "commonjs",
+  "browser": {
+    "./encodePacket.js": "./encodePacket.browser.js",
+    "./decodePacket.js": "./decodePacket.browser.js"
+  }
+}

my-app/node_modules/engine.io-parser/build/esm/commons.d.ts

@@ -0,0 +1,14 @@
+declare const PACKET_TYPES: any;
+declare const PACKET_TYPES_REVERSE: any;
+declare const ERROR_PACKET: Packet;
+export { PACKET_TYPES, PACKET_TYPES_REVERSE, ERROR_PACKET };
+export declare type PacketType = "open" | "close" | "ping" | "pong" | "message" | "upgrade" | "noop" | "error";
+export declare type RawData = any;
+export interface Packet {
+    type: PacketType;
+    options?: {
+        compress: boolean;
+    };
+    data?: RawData;
+}
+export declare type BinaryType = "nodebuffer" | "arraybuffer" | "blob";

my-app/node_modules/engine.io-parser/build/esm/commons.js

@@ -0,0 +1,14 @@
+const PACKET_TYPES = Object.create(null); // no Map = no polyfill
+PACKET_TYPES["open"] = "0";
+PACKET_TYPES["close"] = "1";
+PACKET_TYPES["ping"] = "2";
+PACKET_TYPES["pong"] = "3";
+PACKET_TYPES["message"] = "4";
+PACKET_TYPES["upgrade"] = "5";
+PACKET_TYPES["noop"] = "6";
+const PACKET_TYPES_REVERSE = Object.create(null);
+Object.keys(PACKET_TYPES).forEach((key) => {
+    PACKET_TYPES_REVERSE[PACKET_TYPES[key]] = key;
+});
+const ERROR_PACKET = { type: "error", data: "parser error" };
+export { PACKET_TYPES, PACKET_TYPES_REVERSE, ERROR_PACKET };

my-app/node_modules/engine.io-parser/build/esm/contrib/base64-arraybuffer.d.ts

@@ -0,0 +1,2 @@
+export declare const encode: (arraybuffer: ArrayBuffer) => string;
+export declare const decode: (base64: string) => ArrayBuffer;

my-app/node_modules/engine.io-parser/build/esm/contrib/base64-arraybuffer.js

@@ -0,0 +1,43 @@
+// imported from https://github.com/socketio/base64-arraybuffer
+const chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
+// Use a lookup table to find the index.
+const lookup = typeof Uint8Array === 'undefined' ? [] : new Uint8Array(256);
+for (let i = 0; i < chars.length; i++) {
+    lookup[chars.charCodeAt(i)] = i;
+}
+export const encode = (arraybuffer) => {
+    let bytes = new Uint8Array(arraybuffer), i, len = bytes.length, base64 = '';
+    for (i = 0; i < len; i += 3) {
+        base64 += chars[bytes[i] >> 2];
+        base64 += chars[((bytes[i] & 3) << 4) | (bytes[i + 1] >> 4)];
+        base64 += chars[((bytes[i + 1] & 15) << 2) | (bytes[i + 2] >> 6)];
+        base64 += chars[bytes[i + 2] & 63];
+    }
+    if (len % 3 === 2) {
+        base64 = base64.substring(0, base64.length - 1) + '=';
+    }
+    else if (len % 3 === 1) {
+        base64 = base64.substring(0, base64.length - 2) + '==';
+    }
+    return base64;
+};
+export const decode = (base64) => {
+    let bufferLength = base64.length * 0.75, len = base64.length, i, p = 0, encoded1, encoded2, encoded3, encoded4;
+    if (base64[base64.length - 1] === '=') {
+        bufferLength--;
+        if (base64[base64.length - 2] === '=') {
+            bufferLength--;
+        }
+    }
+    const arraybuffer = new ArrayBuffer(bufferLength), bytes = new Uint8Array(arraybuffer);
+    for (i = 0; i < len; i += 4) {
+        encoded1 = lookup[base64.charCodeAt(i)];
+        encoded2 = lookup[base64.charCodeAt(i + 1)];
+        encoded3 = lookup[base64.charCodeAt(i + 2)];
+        encoded4 = lookup[base64.charCodeAt(i + 3)];
+        bytes[p++] = (encoded1 << 2) | (encoded2 >> 4);
+        bytes[p++] = ((encoded2 & 15) << 4) | (encoded3 >> 2);
+        bytes[p++] = ((encoded3 & 3) << 6) | (encoded4 & 63);
+    }
+    return arraybuffer;
+};

my-app/node_modules/engine.io-parser/build/esm/decodePacket.browser.d.ts

@@ -0,0 +1,2 @@
+import { Packet, BinaryType, RawData } from "./commons.js";
+export declare const decodePacket: (encodedPacket: RawData, binaryType?: BinaryType) => Packet;

my-app/node_modules/engine.io-parser/build/esm/decodePacket.browser.js

@@ -0,0 +1,62 @@
+import { ERROR_PACKET, PACKET_TYPES_REVERSE, } from "./commons.js";
+import { decode } from "./contrib/base64-arraybuffer.js";
+const withNativeArrayBuffer = typeof ArrayBuffer === "function";
+export const decodePacket = (encodedPacket, binaryType) => {
+    if (typeof encodedPacket !== "string") {
+        return {
+            type: "message",
+            data: mapBinary(encodedPacket, binaryType),
+        };
+    }
+    const type = encodedPacket.charAt(0);
+    if (type === "b") {
+        return {
+            type: "message",
+            data: decodeBase64Packet(encodedPacket.substring(1), binaryType),
+        };
+    }
+    const packetType = PACKET_TYPES_REVERSE[type];
+    if (!packetType) {
+        return ERROR_PACKET;
+    }
+    return encodedPacket.length > 1
+        ? {
+            type: PACKET_TYPES_REVERSE[type],
+            data: encodedPacket.substring(1),
+        }
+        : {
+            type: PACKET_TYPES_REVERSE[type],
+        };
+};
+const decodeBase64Packet = (data, binaryType) => {
+    if (withNativeArrayBuffer) {
+        const decoded = decode(data);
+        return mapBinary(decoded, binaryType);
+    }
+    else {
+        return { base64: true, data }; // fallback for old browsers
+    }
+};
+const mapBinary = (data, binaryType) => {
+    switch (binaryType) {
+        case "blob":
+            if (data instanceof Blob) {
+                // from WebSocket + binaryType "blob"
+                return data;
+            }
+            else {
+                // from HTTP long-polling or WebTransport
+                return new Blob([data]);
+            }
+        case "arraybuffer":
+        default:
+            if (data instanceof ArrayBuffer) {
+                // from HTTP long-polling (base64) or WebSocket + binaryType "arraybuffer"
+                return data;
+            }
+            else {
+                // from WebTransport (Uint8Array)
+                return data.buffer;
+            }
+    }
+};

my-app/node_modules/engine.io-parser/build/esm/decodePacket.d.ts

@@ -0,0 +1,2 @@
+import { Packet, BinaryType, RawData } from "./commons.js";
+export declare const decodePacket: (encodedPacket: RawData, binaryType?: BinaryType) => Packet;

my-app/node_modules/engine.io-parser/build/esm/decodePacket.js

@@ -0,0 +1,55 @@
+import { ERROR_PACKET, PACKET_TYPES_REVERSE, } from "./commons.js";
+export const decodePacket = (encodedPacket, binaryType) => {
+    if (typeof encodedPacket !== "string") {
+        return {
+            type: "message",
+            data: mapBinary(encodedPacket, binaryType),
+        };
+    }
+    const type = encodedPacket.charAt(0);
+    if (type === "b") {
+        const buffer = Buffer.from(encodedPacket.substring(1), "base64");
+        return {
+            type: "message",
+            data: mapBinary(buffer, binaryType),
+        };
+    }
+    if (!PACKET_TYPES_REVERSE[type]) {
+        return ERROR_PACKET;
+    }
+    return encodedPacket.length > 1
+        ? {
+            type: PACKET_TYPES_REVERSE[type],
+            data: encodedPacket.substring(1),
+        }
+        : {
+            type: PACKET_TYPES_REVERSE[type],
+        };
+};
+const mapBinary = (data, binaryType) => {
+    switch (binaryType) {
+        case "arraybuffer":
+            if (data instanceof ArrayBuffer) {
+                // from WebSocket & binaryType "arraybuffer"
+                return data;
+            }
+            else if (Buffer.isBuffer(data)) {
+                // from HTTP long-polling
+                return data.buffer.slice(data.byteOffset, data.byteOffset + data.byteLength);
+            }
+            else {
+                // from WebTransport (Uint8Array)
+                return data.buffer;
+            }
+        case "nodebuffer":
+        default:
+            if (Buffer.isBuffer(data)) {
+                // from HTTP long-polling or WebSocket & binaryType "nodebuffer" (default)
+                return data;
+            }
+            else {
+                // from WebTransport (Uint8Array)
+                return Buffer.from(data);
+            }
+    }
+};

my-app/node_modules/engine.io-parser/build/esm/encodePacket.browser.d.ts

@@ -0,0 +1,4 @@
+import { Packet, RawData } from "./commons.js";
+declare const encodePacket: ({ type, data }: Packet, supportsBinary: boolean, callback: (encodedPacket: RawData) => void) => void;
+export declare function encodePacketToBinary(packet: Packet, callback: (encodedPacket: RawData) => void): void | Promise<void>;
+export { encodePacket };

my-app/node_modules/engine.io-parser/build/esm/encodePacket.browser.js

@@ -0,0 +1,68 @@
+import { PACKET_TYPES } from "./commons.js";
+const withNativeBlob = typeof Blob === "function" ||
+    (typeof Blob !== "undefined" &&
+        Object.prototype.toString.call(Blob) === "[object BlobConstructor]");
+const withNativeArrayBuffer = typeof ArrayBuffer === "function";
+// ArrayBuffer.isView method is not defined in IE10
+const isView = (obj) => {
+    return typeof ArrayBuffer.isView === "function"
+        ? ArrayBuffer.isView(obj)
+        : obj && obj.buffer instanceof ArrayBuffer;
+};
+const encodePacket = ({ type, data }, supportsBinary, callback) => {
+    if (withNativeBlob && data instanceof Blob) {
+        if (supportsBinary) {
+            return callback(data);
+        }
+        else {
+            return encodeBlobAsBase64(data, callback);
+        }
+    }
+    else if (withNativeArrayBuffer &&
+        (data instanceof ArrayBuffer || isView(data))) {
+        if (supportsBinary) {
+            return callback(data);
+        }
+        else {
+            return encodeBlobAsBase64(new Blob([data]), callback);
+        }
+    }
+    // plain string
+    return callback(PACKET_TYPES[type] + (data || ""));
+};
+const encodeBlobAsBase64 = (data, callback) => {
+    const fileReader = new FileReader();
+    fileReader.onload = function () {
+        const content = fileReader.result.split(",")[1];
+        callback("b" + (content || ""));
+    };
+    return fileReader.readAsDataURL(data);
+};
+function toArray(data) {
+    if (data instanceof Uint8Array) {
+        return data;
+    }
+    else if (data instanceof ArrayBuffer) {
+        return new Uint8Array(data);
+    }
+    else {
+        return new Uint8Array(data.buffer, data.byteOffset, data.byteLength);
+    }
+}
+let TEXT_ENCODER;
+export function encodePacketToBinary(packet, callback) {
+    if (withNativeBlob && packet.data instanceof Blob) {
+        return packet.data.arrayBuffer().then(toArray).then(callback);
+    }
+    else if (withNativeArrayBuffer &&
+        (packet.data instanceof ArrayBuffer || isView(packet.data))) {
+        return callback(toArray(packet.data));
+    }
+    encodePacket(packet, false, (encoded) => {
+        if (!TEXT_ENCODER) {
+            TEXT_ENCODER = new TextEncoder();
+        }
+        callback(TEXT_ENCODER.encode(encoded));
+    });
+}
+export { encodePacket };

my-app/node_modules/engine.io-parser/build/esm/encodePacket.d.ts

@@ -0,0 +1,3 @@
+import { Packet, RawData } from "./commons.js";
+export declare const encodePacket: ({ type, data }: Packet, supportsBinary: boolean, callback: (encodedPacket: RawData) => void) => void;
+export declare function encodePacketToBinary(packet: Packet, callback: (encodedPacket: RawData) => void): void;

my-app/node_modules/engine.io-parser/build/esm/encodePacket.js

@@ -0,0 +1,33 @@
+import { PACKET_TYPES } from "./commons.js";
+export const encodePacket = ({ type, data }, supportsBinary, callback) => {
+    if (data instanceof ArrayBuffer || ArrayBuffer.isView(data)) {
+        return callback(supportsBinary ? data : "b" + toBuffer(data, true).toString("base64"));
+    }
+    // plain string
+    return callback(PACKET_TYPES[type] + (data || ""));
+};
+const toBuffer = (data, forceBufferConversion) => {
+    if (Buffer.isBuffer(data) ||
+        (data instanceof Uint8Array && !forceBufferConversion)) {
+        return data;
+    }
+    else if (data instanceof ArrayBuffer) {
+        return Buffer.from(data);
+    }
+    else {
+        return Buffer.from(data.buffer, data.byteOffset, data.byteLength);
+    }
+};
+let TEXT_ENCODER;
+export function encodePacketToBinary(packet, callback) {
+    if (packet.data instanceof ArrayBuffer || ArrayBuffer.isView(packet.data)) {
+        return callback(toBuffer(packet.data, false));
+    }
+    encodePacket(packet, true, (encoded) => {
+        if (!TEXT_ENCODER) {
+            // lazily created for compatibility with Node.js 10
+            TEXT_ENCODER = new TextEncoder();
+        }
+        callback(TEXT_ENCODER.encode(encoded));
+    });
+}

my-app/node_modules/engine.io-parser/build/esm/index.d.ts

@@ -0,0 +1,11 @@
+/// <reference types="node" />
+import { encodePacket } from "./encodePacket.js";
+import { decodePacket } from "./decodePacket.js";
+import { Packet, PacketType, RawData, BinaryType } from "./commons.js";
+import type { TransformStream } from "node:stream/web";
+declare const encodePayload: (packets: Packet[], callback: (encodedPayload: string) => void) => void;
+declare const decodePayload: (encodedPayload: string, binaryType?: BinaryType) => Packet[];
+export declare function createPacketEncoderStream(): TransformStream<Packet, any>;
+export declare function createPacketDecoderStream(maxPayload: number, binaryType: BinaryType): TransformStream<Uint8Array, any>;
+export declare const protocol = 4;
+export { encodePacket, encodePayload, decodePacket, decodePayload, Packet, PacketType, RawData, BinaryType, };

my-app/node_modules/engine.io-parser/build/esm/index.js

@@ -0,0 +1,158 @@
+import { encodePacket, encodePacketToBinary } from "./encodePacket.js";
+import { decodePacket } from "./decodePacket.js";
+import { ERROR_PACKET, } from "./commons.js";
+const SEPARATOR = String.fromCharCode(30); // see https://en.wikipedia.org/wiki/Delimiter#ASCII_delimited_text
+const encodePayload = (packets, callback) => {
+    // some packets may be added to the array while encoding, so the initial length must be saved
+    const length = packets.length;
+    const encodedPackets = new Array(length);
+    let count = 0;
+    packets.forEach((packet, i) => {
+        // force base64 encoding for binary packets
+        encodePacket(packet, false, (encodedPacket) => {
+            encodedPackets[i] = encodedPacket;
+            if (++count === length) {
+                callback(encodedPackets.join(SEPARATOR));
+            }
+        });
+    });
+};
+const decodePayload = (encodedPayload, binaryType) => {
+    const encodedPackets = encodedPayload.split(SEPARATOR);
+    const packets = [];
+    for (let i = 0; i < encodedPackets.length; i++) {
+        const decodedPacket = decodePacket(encodedPackets[i], binaryType);
+        packets.push(decodedPacket);
+        if (decodedPacket.type === "error") {
+            break;
+        }
+    }
+    return packets;
+};
+export function createPacketEncoderStream() {
+    // @ts-expect-error
+    return new TransformStream({
+        transform(packet, controller) {
+            encodePacketToBinary(packet, (encodedPacket) => {
+                const payloadLength = encodedPacket.length;
+                let header;
+                // inspired by the WebSocket format: https://developer.mozilla.org/en-US/docs/Web/API/WebSockets_API/Writing_WebSocket_servers#decoding_payload_length
+                if (payloadLength < 126) {
+                    header = new Uint8Array(1);
+                    new DataView(header.buffer).setUint8(0, payloadLength);
+                }
+                else if (payloadLength < 65536) {
+                    header = new Uint8Array(3);
+                    const view = new DataView(header.buffer);
+                    view.setUint8(0, 126);
+                    view.setUint16(1, payloadLength);
+                }
+                else {
+                    header = new Uint8Array(9);
+                    const view = new DataView(header.buffer);
+                    view.setUint8(0, 127);
+                    view.setBigUint64(1, BigInt(payloadLength));
+                }
+                // first bit indicates whether the payload is plain text (0) or binary (1)
+                if (packet.data && typeof packet.data !== "string") {
+                    header[0] |= 0x80;
+                }
+                controller.enqueue(header);
+                controller.enqueue(encodedPacket);
+            });
+        },
+    });
+}
+let TEXT_DECODER;
+function totalLength(chunks) {
+    return chunks.reduce((acc, chunk) => acc + chunk.length, 0);
+}
+function concatChunks(chunks, size) {
+    if (chunks[0].length === size) {
+        return chunks.shift();
+    }
+    const buffer = new Uint8Array(size);
+    let j = 0;
+    for (let i = 0; i < size; i++) {
+        buffer[i] = chunks[0][j++];
+        if (j === chunks[0].length) {
+            chunks.shift();
+            j = 0;
+        }
+    }
+    if (chunks.length && j < chunks[0].length) {
+        chunks[0] = chunks[0].slice(j);
+    }
+    return buffer;
+}
+export function createPacketDecoderStream(maxPayload, binaryType) {
+    if (!TEXT_DECODER) {
+        TEXT_DECODER = new TextDecoder();
+    }
+    const chunks = [];
+    let state = 0 /* READ_HEADER */;
+    let expectedLength = -1;
+    let isBinary = false;
+    // @ts-expect-error
+    return new TransformStream({
+        transform(chunk, controller) {
+            chunks.push(chunk);
+            while (true) {
+                if (state === 0 /* READ_HEADER */) {
+                    if (totalLength(chunks) < 1) {
+                        break;
+                    }
+                    const header = concatChunks(chunks, 1);
+                    isBinary = (header[0] & 0x80) === 0x80;
+                    expectedLength = header[0] & 0x7f;
+                    if (expectedLength < 126) {
+                        state = 3 /* READ_PAYLOAD */;
+                    }
+                    else if (expectedLength === 126) {
+                        state = 1 /* READ_EXTENDED_LENGTH_16 */;
+                    }
+                    else {
+                        state = 2 /* READ_EXTENDED_LENGTH_64 */;
+                    }
+                }
+                else if (state === 1 /* READ_EXTENDED_LENGTH_16 */) {
+                    if (totalLength(chunks) < 2) {
+                        break;
+                    }
+                    const headerArray = concatChunks(chunks, 2);
+                    expectedLength = new DataView(headerArray.buffer, headerArray.byteOffset, headerArray.length).getUint16(0);
+                    state = 3 /* READ_PAYLOAD */;
+                }
+                else if (state === 2 /* READ_EXTENDED_LENGTH_64 */) {
+                    if (totalLength(chunks) < 8) {
+                        break;
+                    }
+                    const headerArray = concatChunks(chunks, 8);
+                    const view = new DataView(headerArray.buffer, headerArray.byteOffset, headerArray.length);
+                    const n = view.getUint32(0);
+                    if (n > Math.pow(2, 53 - 32) - 1) {
+                        // the maximum safe integer in JavaScript is 2^53 - 1
+                        controller.enqueue(ERROR_PACKET);
+                        break;
+                    }
+                    expectedLength = n * Math.pow(2, 32) + view.getUint32(4);
+                    state = 3 /* READ_PAYLOAD */;
+                }
+                else {
+                    if (totalLength(chunks) < expectedLength) {
+                        break;
+                    }
+                    const data = concatChunks(chunks, expectedLength);
+                    controller.enqueue(decodePacket(isBinary ? data : TEXT_DECODER.decode(data), binaryType));
+                    state = 0 /* READ_HEADER */;
+                }
+                if (expectedLength === 0 || expectedLength > maxPayload) {
+                    controller.enqueue(ERROR_PACKET);
+                    break;
+                }
+            }
+        },
+    });
+}
+export const protocol = 4;
+export { encodePacket, encodePayload, decodePacket, decodePayload, };

my-app/node_modules/engine.io-parser/build/esm/package.json

@@ -0,0 +1,8 @@
+{
+  "name": "engine.io-parser",
+  "type": "module",
+  "browser": {
+    "./encodePacket.js": "./encodePacket.browser.js",
+    "./decodePacket.js": "./decodePacket.browser.js"
+  }
+}

my-app/node_modules/engine.io-parser/package.json

@@ -0,0 +1,59 @@
+{
+  "name": "engine.io-parser",
+  "description": "Parser for the client for the realtime Engine",
+  "license": "MIT",
+  "version": "5.2.2",
+  "main": "./build/cjs/index.js",
+  "module": "./build/esm/index.js",
+  "exports": {
+    "import": "./build/esm/index.js",
+    "require": "./build/cjs/index.js"
+  },
+  "types": "build/esm/index.d.ts",
+  "homepage": "https://github.com/socketio/engine.io-parser",
+  "devDependencies": {
+    "@babel/core": "~7.9.6",
+    "@babel/preset-env": "~7.9.6",
+    "@types/mocha": "^9.0.0",
+    "@types/node": "^16.9.6",
+    "babelify": "^10.0.0",
+    "benchmark": "^2.1.4",
+    "expect.js": "0.3.1",
+    "mocha": "^5.2.0",
+    "nyc": "~15.0.1",
+    "prettier": "^3.2.5",
+    "rimraf": "^3.0.2",
+    "socket.io-browsers": "^1.0.4",
+    "ts-node": "^10.2.1",
+    "tsify": "^5.0.4",
+    "typescript": "^4.4.3",
+    "zuul": "3.11.1",
+    "zuul-ngrok": "4.0.0"
+  },
+  "scripts": {
+    "compile": "rimraf ./build && tsc && tsc -p tsconfig.esm.json && ./postcompile.sh",
+    "test": "npm run format:check && npm run compile && if test \"$BROWSERS\" = \"1\" ; then npm run test:browser; else npm run test:node; fi",
+    "test:node": "nyc mocha -r ts-node/register test/index.ts",
+    "test:browser": "zuul test/index.ts --no-coverage",
+    "format:check": "prettier --check 'lib/**/*.ts' 'test/**/*.ts'",
+    "format:fix": "prettier --write 'lib/**/*.ts' 'test/**/*.ts'",
+    "prepack": "npm run compile"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git@github.com:socketio/engine.io-parser.git"
+  },
+  "files": [
+    "build/"
+  ],
+  "browser": {
+    "./test/node": "./test/browser",
+    "./build/esm/encodePacket.js": "./build/esm/encodePacket.browser.js",
+    "./build/esm/decodePacket.js": "./build/esm/decodePacket.browser.js",
+    "./build/cjs/encodePacket.js": "./build/cjs/encodePacket.browser.js",
+    "./build/cjs/decodePacket.js": "./build/cjs/decodePacket.browser.js"
+  },
+  "engines": {
+    "node": ">=10.0.0"
+  }
+}