Add web front-end and fix API issues

node_modules/rxjs/dist/cjs/internal/operators/throwIfEmpty.js

@@ -0,0 +1,21 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.throwIfEmpty = void 0;
+var EmptyError_1 = require("../util/EmptyError");
+var lift_1 = require("../util/lift");
+var OperatorSubscriber_1 = require("./OperatorSubscriber");
+function throwIfEmpty(errorFactory) {
+    if (errorFactory === void 0) { errorFactory = defaultErrorFactory; }
+    return lift_1.operate(function (source, subscriber) {
+        var hasValue = false;
+        source.subscribe(OperatorSubscriber_1.createOperatorSubscriber(subscriber, function (value) {
+            hasValue = true;
+            subscriber.next(value);
+        }, function () { return (hasValue ? subscriber.complete() : subscriber.error(errorFactory())); }));
+    });
+}
+exports.throwIfEmpty = throwIfEmpty;
+function defaultErrorFactory() {
+    return new EmptyError_1.EmptyError();
+}
+//# sourceMappingURL=throwIfEmpty.js.map