I tried just changing the ESRIRequest to "text" but still got nothing, is it a problem with the url?
var photos = esriRequest({
"url": "SWUWebService.asmx/HelloWorld",
"handleAs": "text"
});
photos.then(requestSucceeded, error);
function requestSucceeded(data) {
console.log("Data: ", data); // print the data to browser's console
}
WebService...
<WebMethod()> _
Public Function HelloWorld() As String
Return "Hello World"
End Function