fix: fix usage with vite

It seems vite has issues with absolute dependencies in the "browser"
field, so we'll provide a quick workaround.

Backported from 4971914

Related: socketio/socket.io-client#1549

lib/transports/index.js

@@ -2,7 +2,7 @@
  * Module dependencies
  */
 
-var XMLHttpRequest = require('xmlhttprequest-ssl');
+var XMLHttpRequest = require('./xmlhttprequest');
 var XHR = require('./polling-xhr');
 var JSONP = require('./polling-jsonp');
 var websocket = require('./websocket');

lib/transports/polling-xhr.js

@@ -4,7 +4,7 @@
  * Module requirements.
  */
 
-var XMLHttpRequest = require('xmlhttprequest-ssl');
+var XMLHttpRequest = require('./xmlhttprequest');
 var Polling = require('./polling');
 var Emitter = require('component-emitter');
 var inherit = require('component-inherit');

lib/transports/polling.js

@@ -20,7 +20,7 @@ module.exports = Polling;
  */
 
 var hasXHR2 = (function () {
-  var XMLHttpRequest = require('xmlhttprequest-ssl');
+  var XMLHttpRequest = require('./xmlhttprequest');
   var xhr = new XMLHttpRequest({ xdomain: false });
   return null != xhr.responseType;
 })();

lib/xmlhttprequest.js → lib/transports/xmlhttprequest.browser.js

@@ -1,7 +1,7 @@
 // browser shim for xmlhttprequest module
 
 var hasCORS = require('has-cors');
-var globalThis = require('./globalThis');
+var globalThis = require('../globalThis');
 
 module.exports = function (opts) {
   var xdomain = opts.xdomain;

lib/transports/xmlhttprequest.js

@@ -0,0 +1 @@
+module.exports = require('xmlhttprequest-ssl');

package.json

@@ -69,7 +69,7 @@
   },
   "browser": {
     "ws": false,
-    "xmlhttprequest-ssl": "./lib/xmlhttprequest.js",
+    "./lib/transports/xmlhttprequest.js": "./lib/transports/xmlhttprequest.browser.js",
     "./lib/globalThis.js": "./lib/globalThis.browser.js"
   },
   "repository": {

test/xmlhttprequest.js

@@ -1,5 +1,5 @@
 var expect = require('expect.js');
-var XMLHttpRequest = require('../lib/xmlhttprequest');
+var XMLHttpRequest = require('../lib/transports/xmlhttprequest');
 var env = require('./support/env');
 
 describe('XMLHttpRequest', function () {