From abd4aacc8c47a251f069a66652434ca65f278c2a Mon Sep 17 00:00:00 2001
From: Sceat <11330271+Sceat@users.noreply.github.com>
Date: Tue, 5 May 2020 20:37:51 +0200
Subject: [PATCH] remove implicit once

https://github.com/websockets/ws/pull/1754#issuecomment-624228689
---
 lib/event-target.js | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/lib/event-target.js b/lib/event-target.js
index 9eb13f2c2..b5a5de39a 100644
--- a/lib/event-target.js
+++ b/lib/event-target.js
@@ -116,26 +116,22 @@ const EventTarget = {
    */
   addEventListener(method, listener, options = {}) {
     if (typeof listener !== 'function') return;
-    const { once } = options;
 
     function onMessage(data) {
       listener.call(this, new MessageEvent(data, this));
-      if (once) this.removeListener(method, listener);
+      if (options.once) this.removeListener(method, listener);
     }
 
     function onClose(code, message) {
       listener.call(this, new CloseEvent(code, message, this));
-      if (once) this.removeListener(method, listener);
     }
 
     function onError(error) {
       listener.call(this, new ErrorEvent(error, this));
-      if (once) this.removeListener(method, listener);
     }
 
     function onOpen() {
       listener.call(this, new OpenEvent(this));
-      if (once) this.removeListener(method, listener);
     }
 
     if (method === 'message') {