first commit

core/misc/polyfills/element.matchesdfb4.js

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+/**
+* DO NOT EDIT THIS FILE.
+* See the following change record for more information,
+* https://www.drupal.org/node/2815083
+* @preserve
+**/
+if (!Element.prototype.matches) {
+  Element.prototype.matches = Element.prototype.msMatchesSelector || Element.prototype.webkitMatchesSelector;
+}

core/misc/polyfills/nodelist.foreachdfb4.js

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+/**
+* DO NOT EDIT THIS FILE.
+* See the following change record for more information,
+* https://www.drupal.org/node/2815083
+* @preserve
+**/
+if (window.NodeList && !NodeList.prototype.forEach) {
+  NodeList.prototype.forEach = Array.prototype.forEach;
+}

core/misc/polyfills/object.assigndfb4.js

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+/**
+* DO NOT EDIT THIS FILE.
+* See the following change record for more information,
+* https://www.drupal.org/node/2815083
+* @preserve
+**/
+if (typeof Object.assign !== 'function') {
+  Object.defineProperty(Object, 'assign', {
+    value: function assign(target, varArgs) {
+      'use strict';
+
+      if (target === null || target === undefined) {
+        throw new TypeError('Cannot convert undefined or null to object');
+      }
+      var to = Object(target);
+      for (var index = 1; index < arguments.length; index++) {
+        var nextSource = arguments[index];
+        if (nextSource !== null && nextSource !== undefined) {
+          for (var nextKey in nextSource) {
+            if (Object.prototype.hasOwnProperty.call(nextSource, nextKey)) {
+              to[nextKey] = nextSource[nextKey];
+            }
+          }
+        }
+      }
+      return to;
+    },
+    writable: true,
+    configurable: true
+  });
+}