Add web front-end and fix API issues

node_modules/rxjs/dist/esm/internal/observable/range.js

@@ -0,0 +1,35 @@
+import { Observable } from '../Observable';
+import { EMPTY } from './empty';
+export function range(start, count, scheduler) {
+    if (count == null) {
+        count = start;
+        start = 0;
+    }
+    if (count <= 0) {
+        return EMPTY;
+    }
+    const end = count + start;
+    return new Observable(scheduler
+        ?
+            (subscriber) => {
+                let n = start;
+                return scheduler.schedule(function () {
+                    if (n < end) {
+                        subscriber.next(n++);
+                        this.schedule();
+                    }
+                    else {
+                        subscriber.complete();
+                    }
+                });
+            }
+        :
+            (subscriber) => {
+                let n = start;
+                while (n < end && !subscriber.closed) {
+                    subscriber.next(n++);
+                }
+                subscriber.complete();
+            });
+}
+//# sourceMappingURL=range.js.map