Add web front-end and fix API issues

node_modules/rxjs/dist/esm5/internal/operators/exhaustMap.js

@@ -0,0 +1,29 @@
+import { map } from './map';
+import { innerFrom } from '../observable/innerFrom';
+import { operate } from '../util/lift';
+import { createOperatorSubscriber } from './OperatorSubscriber';
+export function exhaustMap(project, resultSelector) {
+    if (resultSelector) {
+        return function (source) {
+            return source.pipe(exhaustMap(function (a, i) { return innerFrom(project(a, i)).pipe(map(function (b, ii) { return resultSelector(a, b, i, ii); })); }));
+        };
+    }
+    return operate(function (source, subscriber) {
+        var index = 0;
+        var innerSub = null;
+        var isComplete = false;
+        source.subscribe(createOperatorSubscriber(subscriber, function (outerValue) {
+            if (!innerSub) {
+                innerSub = createOperatorSubscriber(subscriber, undefined, function () {
+                    innerSub = null;
+                    isComplete && subscriber.complete();
+                });
+                innerFrom(project(outerValue, index++)).subscribe(innerSub);
+            }
+        }, function () {
+            isComplete = true;
+            !innerSub && subscriber.complete();
+        }));
+    });
+}
+//# sourceMappingURL=exhaustMap.js.map