Add web front-end and fix API issues

node_modules/rxjs/dist/esm5/internal/scheduler/immediateProvider.js

@@ -0,0 +1,19 @@
+import { __read, __spreadArray } from "tslib";
+import { Immediate } from '../util/Immediate';
+var setImmediate = Immediate.setImmediate, clearImmediate = Immediate.clearImmediate;
+export var immediateProvider = {
+    setImmediate: function () {
+        var args = [];
+        for (var _i = 0; _i < arguments.length; _i++) {
+            args[_i] = arguments[_i];
+        }
+        var delegate = immediateProvider.delegate;
+        return ((delegate === null || delegate === void 0 ? void 0 : delegate.setImmediate) || setImmediate).apply(void 0, __spreadArray([], __read(args)));
+    },
+    clearImmediate: function (handle) {
+        var delegate = immediateProvider.delegate;
+        return ((delegate === null || delegate === void 0 ? void 0 : delegate.clearImmediate) || clearImmediate)(handle);
+    },
+    delegate: undefined,
+};
+//# sourceMappingURL=immediateProvider.js.map