Is Speech to Text (Azure Cognitive Services) supported for WebGL Builds in Unity?

Hello,

I'm trying to use Speech SDK JavaScript SDK in Unity WebGL application and it's ok for the call but I have problem with call back to Unity c# code not expecting text from STT?

I am using this code to resynchronize the call to STT before returning the value to Unity C#. The alert message is prompt with the voice text (so I think the code correctly resyncs the async call) but a result is returned to Unity without waiting for the resync (return is execute before alert)

Do you have any idea what's wrong with my code?

Thank you for your help.

var promise = new Promise((resolve, reject) => {recognizer.recognizeOnceAsync(
            function (result) {             
              window.console.log(result.text);
              texte=texte+result.text;
              recognizer.close();
              recognizer = undefined;
              resolve(texte);              
            },
            function (err) {
              window.console.log(err);
			  
              recognizer.close();
              recognizer = undefined;
              resolve("ERROR : "+err);
              
            }     
            )
           }
          );
                  
          var result  = await promise; 
alert("text="+result);
return result;