Add web front-end and fix API issues

node_modules/rxjs/dist/esm5/internal/BehaviorSubject.js

@@ -0,0 +1,36 @@
+import { __extends } from "tslib";
+import { Subject } from './Subject';
+var BehaviorSubject = (function (_super) {
+    __extends(BehaviorSubject, _super);
+    function BehaviorSubject(_value) {
+        var _this = _super.call(this) || this;
+        _this._value = _value;
+        return _this;
+    }
+    Object.defineProperty(BehaviorSubject.prototype, "value", {
+        get: function () {
+            return this.getValue();
+        },
+        enumerable: false,
+        configurable: true
+    });
+    BehaviorSubject.prototype._subscribe = function (subscriber) {
+        var subscription = _super.prototype._subscribe.call(this, subscriber);
+        !subscription.closed && subscriber.next(this._value);
+        return subscription;
+    };
+    BehaviorSubject.prototype.getValue = function () {
+        var _a = this, hasError = _a.hasError, thrownError = _a.thrownError, _value = _a._value;
+        if (hasError) {
+            throw thrownError;
+        }
+        this._throwIfClosed();
+        return _value;
+    };
+    BehaviorSubject.prototype.next = function (value) {
+        _super.prototype.next.call(this, (this._value = value));
+    };
+    return BehaviorSubject;
+}(Subject));
+export { BehaviorSubject };
+//# sourceMappingURL=BehaviorSubject.js.map