Update subscriptions.mdx

dotansimha · Aug 10, 2022 · 695b015 · 695b015
1 parent 901d48a
commit 695b015
Showing 1 changed file with 9 additions and 5 deletions.
diff --git a/website/docs/features/subscriptions.mdx b/website/docs/features/subscriptions.mdx
@@ -155,11 +155,15 @@ class SSELink extends ApolloLink {
   public request(operation: Operation): Observable<FetchResult> {
     const url = new URL(this.options.uri)
     url.searchParams.append('query', print(operation.query))
-    url.searchParams.append(
-      'extensions',
-      JSON.stringify(operation.operationName),
-    )
-    url.searchParams.append('variables', JSON.stringify(operation.variables))
+    if (operation.operationName) {
+      url.searchParams.append(
+        'operationName',
+        JSON.stringify(operation.operationName),
+      )
+    }
+    if (operation.variables) {
+      url.searchParams.append('variables', JSON.stringify(operation.variables))
+    }
     if (operation.extensions) {
       url.searchParams.append(
         'extensions',