This error typically indicates the lack of a
To upload a form with an input type="file":
dojo.io.iframe.send({ form:"someForm", url:"endpoint.php",
load:function(data){
console.log(data)
}
});
and a response would look like:
To use handleAs:"json", wrap the object in the textarea:
<textarea>{ item:"one", another:"item" }
</textarea>
