diff --git a/core/core.libraries.yml b/core/core.libraries.yml
index fa04996533..0ac4725aeb 100644
--- a/core/core.libraries.yml
+++ b/core/core.libraries.yml
@@ -855,7 +855,7 @@ loadjs:
     url: https://github.com/muicss/loadjs/blob/master/LICENSE.txt
     gpl-compatible: true
   js:
-    assets/vendor/loadjs/loadjs.min.js: { minified: true }
+    assets/vendor/loadjs/loadjs.min.js: {}
 
 matchmedia:
   remote: https://github.com/paulirish/matchMedia.js
diff --git a/core/lib/Drupal/Core/Ajax/AddJsCommand.php b/core/lib/Drupal/Core/Ajax/AddJsCommand.php
index 5ca58fd7b0..5739ba22c2 100644
--- a/core/lib/Drupal/Core/Ajax/AddJsCommand.php
+++ b/core/lib/Drupal/Core/Ajax/AddJsCommand.php
@@ -47,7 +47,7 @@ class AddJsCommand implements CommandInterface {
    * @param string $method
    *   The DOM manipulation method to be used.
    */
-  public function __construct($selector, $scripts, $method = 'appendChild') {
+  public function __construct($selector, array $scripts, $method = 'appendChild') {
     $this->selector = $selector;
     $this->styles = $scripts;
     $this->method = $method;
diff --git a/core/misc/ajax.es6.js b/core/misc/ajax.es6.js
index 91410bf2aa..5a9c6c92ed 100644
--- a/core/misc/ajax.es6.js
+++ b/core/misc/ajax.es6.js
@@ -883,7 +883,7 @@
 
         const result = this.commands[command](this, response[key], status);
         if (typeof result === 'object' && typeof result.then === 'function') {
-          // handle a promise
+          // Handle a promise.
           result.done(() => {
             if (currentIndex + 1 === responseKeys.length) {
               this.ajaxDeferred.resolve();