bugfix

app.py

@@ -121,7 +121,7 @@ with demo:
 
     post_hit_js = """
         function(state) {
-            if (state["assignmentId"] !== "" || state["assignmentId"] == "ASSIGNMENT_ID_NOT_AVAILABLE"){
+            if (state["assignmentId"] !== "" && state["assignmentId"] !== "ASSIGNMENT_ID_NOT_AVAILABLE"){
                 // If there is an assignmentId, then the submitter is on mturk
                 // and has accepted the HIT. So, we need to submit their HIT.
                 const form = document.createElement('form');
@@ -139,8 +139,9 @@ with demo:
                 return state;
             } else {
                 // If there is no assignmentId, then we assume that the submitter is
-                // on huggingface.co and we can't submit a HIT to mturk. But
-                // _store_in_huggingface_dataset will still store their example in
+                // on huggingface.co or there is an mturker doing the preview.
+                // This means that we can't log a HIT in mturk, but
+                // _store_in_huggingface_dataset will still store the example in
                 // our dataset without an assignmentId. The following line here
                 // loads the app again so the user can enter in another "fake" HIT.
                 window.location.href = window.location.href;