update

node_modules/rxjs/_esm5/symbol/iterator.js

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+/** PURE_IMPORTS_START .._util_root PURE_IMPORTS_END */
+import { root } from '../util/root';
+export function symbolIteratorPonyfill(root) {
+    var Symbol = root.Symbol;
+    if (typeof Symbol === 'function') {
+        if (!Symbol.iterator) {
+            Symbol.iterator = Symbol('iterator polyfill');
+        }
+        return Symbol.iterator;
+    }
+    else {
+        // [for Mozilla Gecko 27-35:](https://mzl.la/2ewE1zC)
+        var Set_1 = root.Set;
+        if (Set_1 && typeof new Set_1()['@@iterator'] === 'function') {
+            return '@@iterator';
+        }
+        var Map_1 = root.Map;
+        // required for compatability with es6-shim
+        if (Map_1) {
+            var keys = Object.getOwnPropertyNames(Map_1.prototype);
+            for (var i = 0; i < keys.length; ++i) {
+                var key = keys[i];
+                // according to spec, Map.prototype[@@iterator] and Map.orototype.entries must be equal.
+                if (key !== 'entries' && key !== 'size' && Map_1.prototype[key] === Map_1.prototype['entries']) {
+                    return key;
+                }
+            }
+        }
+        return '@@iterator';
+    }
+}
+export var iterator = /*@__PURE__*/ symbolIteratorPonyfill(root);
+/**
+ * @deprecated use iterator instead
+ */
+export var $$iterator = iterator;
+//# sourceMappingURL=iterator.js.map