Add web front-end and fix API issues

node_modules/rxjs/dist/esm/internal/ajax/getXHRResponse.js

@@ -0,0 +1,26 @@
+export function getXHRResponse(xhr) {
+    switch (xhr.responseType) {
+        case 'json': {
+            if ('response' in xhr) {
+                return xhr.response;
+            }
+            else {
+                const ieXHR = xhr;
+                return JSON.parse(ieXHR.responseText);
+            }
+        }
+        case 'document':
+            return xhr.responseXML;
+        case 'text':
+        default: {
+            if ('response' in xhr) {
+                return xhr.response;
+            }
+            else {
+                const ieXHR = xhr;
+                return ieXHR.responseText;
+            }
+        }
+    }
+}
+//# sourceMappingURL=getXHRResponse.js.map