upgrades core to 8.4.2

core/misc/debounce.js

@@ -1,41 +1,17 @@
 /**
- * @file
- * Adapted from underscore.js with the addition Drupal namespace.
- */
+* DO NOT EDIT THIS FILE.
+* See the following change record for more information,
+* https://www.drupal.org/node/2815083
+* @preserve
+**/
 
-/**
- * Limits the invocations of a function in a given time frame.
- *
- * The debounce function wrapper should be used sparingly. One clear use case
- * is limiting the invocation of a callback attached to the window resize event.
- *
- * Before using the debounce function wrapper, consider first whether the
- * callback could be attached to an event that fires less frequently or if the
- * function can be written in such a way that it is only invoked under specific
- * conditions.
- *
- * @param {function} func
- *   The function to be invoked.
- * @param {number} wait
- *   The time period within which the callback function should only be
- *   invoked once. For example if the wait period is 250ms, then the callback
- *   will only be called at most 4 times per second.
- * @param {bool} immediate
- *   Whether we wait at the beginning or end to execute the function.
- *
- * @return {function}
- *   The debounced function.
- */
 Drupal.debounce = function (func, wait, immediate) {
-
-  'use strict';
-
-  var timeout;
-  var result;
+  var timeout = void 0;
+  var result = void 0;
   return function () {
     var context = this;
     var args = arguments;
-    var later = function () {
+    var later = function later() {
       timeout = null;
       if (!immediate) {
         result = func.apply(context, args);
@@ -49,4 +25,4 @@ Drupal.debounce = function (func, wait, immediate) {
     }
     return result;
   };
-};
+};