Add web front-end and fix API issues

node_modules/rxjs/dist/esm/internal/operators/takeWhile.js

@@ -0,0 +1,13 @@
+import { operate } from '../util/lift';
+import { createOperatorSubscriber } from './OperatorSubscriber';
+export function takeWhile(predicate, inclusive = false) {
+    return operate((source, subscriber) => {
+        let index = 0;
+        source.subscribe(createOperatorSubscriber(subscriber, (value) => {
+            const result = predicate(value, index++);
+            (result || inclusive) && subscriber.next(value);
+            !result && subscriber.complete();
+        }));
+    });
+}
+//# sourceMappingURL=takeWhile.js.map