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web/core/misc/polyfills/object.assign.es6.js

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+/**
+ * @file
+ * Provides a polyfill for Object.assign().
+ *
+ * This is needed for Internet Explorer 11 and Opera Mini.
+ *
+ * This has been copied from MDN Web Docs code samples. Code samples in the MDN
+ * Web Docs are licensed under CC0.
+ *
+ * @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/assign#Polyfill
+ * @see https://developer.mozilla.org/en-US/docs/MDN/About#Code_samples_and_snippets
+ */
+if (typeof Object.assign !== 'function') {
+  // Must be writable: true, enumerable: false, configurable: true
+  Object.defineProperty(Object, 'assign', {
+    value: function assign(target, varArgs) {
+      // .length of function is 2
+      '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) {
+            // Avoid bugs when hasOwnProperty is shadowed
+            if (Object.prototype.hasOwnProperty.call(nextSource, nextKey)) {
+              to[nextKey] = nextSource[nextKey];
+            }
+          }
+        }
+      }
+      return to;
+    },
+    writable: true,
+    configurable: true,
+  });
+}

web/core/misc/polyfills/object.assign.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
+  });
+}