From 010658f74f9d5a8c5c14939a889584026b0a48e8 Mon Sep 17 00:00:00 2001
From: Kevin Jahns <kevin.jahns@pm.me>
Date: Mon, 17 May 2021 17:26:33 +0200
Subject: [PATCH] Remove dependency on window - fixes #65

---
 src/y-websocket.js | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/y-websocket.js b/src/y-websocket.js
index 0bf0932..8179d1c 100644
--- a/src/y-websocket.js
+++ b/src/y-websocket.js
@@ -276,9 +276,11 @@ export class WebsocketProvider extends Observable {
       encoding.writeVarUint8Array(encoder, awarenessProtocol.encodeAwarenessUpdate(awareness, changedClients))
       broadcastMessage(this, encoding.toUint8Array(encoder))
     }
-    window.addEventListener('beforeunload', () => {
-      awarenessProtocol.removeAwarenessStates(this.awareness, [doc.clientID], 'window unload')
-    })
+    if (typeof window !== 'undefined') {
+      window.addEventListener('beforeunload', () => {
+        awarenessProtocol.removeAwarenessStates(this.awareness, [doc.clientID], 'window unload')
+      })
+    }
     awareness.on('update', this._awarenessUpdateHandler)
     this._checkInterval = /** @type {any} */ (setInterval(() => {
       if (this.wsconnected && messageReconnectTimeout < time.getUnixTime() - this.wsLastMessageReceived) {