From ec3d2be761fb3c73ef28eddfed87ffd69df8c2d7 Mon Sep 17 00:00:00 2001
From: Jonas Jenwald <jonas.jenwald@gmail.com>
Date: Sat, 26 Aug 2023 10:52:23 +0200
Subject: [PATCH] Introduce more optional chaining in the code-base

Also, use logical OR assignment a bit more.
---
 src/core/worker_stream.js | 5 ++---
 src/display/api.js        | 6 +-----
 src/pdf.sandbox.js        | 4 +---
 3 files changed, 4 insertions(+), 11 deletions(-)

diff --git a/src/core/worker_stream.js b/src/core/worker_stream.js
index f3baa72ea8089..047935316cde4 100644
--- a/src/core/worker_stream.js
+++ b/src/core/worker_stream.js
@@ -40,9 +40,8 @@ class PDFWorkerStream {
   }
 
   cancelAllRequests(reason) {
-    if (this._fullRequestReader) {
-      this._fullRequestReader.cancel(reason);
-    }
+    this._fullRequestReader?.cancel(reason);
+
     for (const reader of this._rangeRequestReaders.slice(0)) {
       reader.cancel(reason);
     }
diff --git a/src/display/api.js b/src/display/api.js
index b21e02affc416..d351dcbd110e2 100644
--- a/src/display/api.js
+++ b/src/display/api.js
@@ -3153,11 +3153,7 @@ class PDFObjects {
    * @returns {Object}
    */
   #ensureObj(objId) {
-    const obj = this.#objs[objId];
-    if (obj) {
-      return obj;
-    }
-    return (this.#objs[objId] = {
+    return (this.#objs[objId] ||= {
       capability: new PromiseCapability(),
       data: null,
     });
diff --git a/src/pdf.sandbox.js b/src/pdf.sandbox.js
index 0fd91a330d265..f7c1d981c3a26 100644
--- a/src/pdf.sandbox.js
+++ b/src/pdf.sandbox.js
@@ -107,9 +107,7 @@ class Sandbox {
   }
 
   dumpMemoryUse() {
-    if (this._module) {
-      this._module.ccall("dumpMemoryUse", null, []);
-    }
+    this._module?.ccall("dumpMemoryUse", null, []);
   }
 
   nukeSandbox() {