From 499610779ecf7e67c5cc97baca3d7bc235556120 Mon Sep 17 00:00:00 2001
From: Jonas Jenwald <jonas.jenwald@gmail.com>
Date: Fri, 23 Sep 2022 13:25:15 +0200
Subject: [PATCH] Re-factor the `LoopbackPort` class to use *proper* private
 fields

---
 src/display/api.js | 19 +++++++++----------
 1 file changed, 9 insertions(+), 10 deletions(-)

diff --git a/src/display/api.js b/src/display/api.js
index 6e768be86..e449ea319 100644
--- a/src/display/api.js
+++ b/src/display/api.js
@@ -1853,34 +1853,33 @@ class PDFPageProxy {
 }
 
 class LoopbackPort {
-  constructor() {
-    this._listeners = [];
-    this._deferred = Promise.resolve();
-  }
+  #listeners = [];
+
+  #deferred = Promise.resolve();
 
   postMessage(obj, transfers) {
     const event = {
       data: structuredClone(obj, transfers),
     };
 
-    this._deferred.then(() => {
-      for (const listener of this._listeners) {
+    this.#deferred.then(() => {
+      for (const listener of this.#listeners) {
         listener.call(this, event);
       }
     });
   }
 
   addEventListener(name, listener) {
-    this._listeners.push(listener);
+    this.#listeners.push(listener);
   }
 
   removeEventListener(name, listener) {
-    const i = this._listeners.indexOf(listener);
-    this._listeners.splice(i, 1);
+    const i = this.#listeners.indexOf(listener);
+    this.#listeners.splice(i, 1);
   }
 
   terminate() {
-    this._listeners.length = 0;
+    this.#listeners.length = 0;
   }
 }