Add web front-end and fix API issues

node_modules/rxjs/dist/esm/internal/util/lift.js

@@ -0,0 +1,20 @@
+import { isFunction } from './isFunction';
+export function hasLift(source) {
+    return isFunction(source === null || source === void 0 ? void 0 : source.lift);
+}
+export function operate(init) {
+    return (source) => {
+        if (hasLift(source)) {
+            return source.lift(function (liftedSource) {
+                try {
+                    return init(liftedSource, this);
+                }
+                catch (err) {
+                    this.error(err);
+                }
+            });
+        }
+        throw new TypeError('Unable to lift unknown Observable type');
+    };
+}
+//# sourceMappingURL=lift.js.map