Pretty old thread, but... to fix the "is not a function" error you need to
add the GWT compiler param "-generateJsInteropExports".
On Thursday, November 17, 2016 at 11:32:30 AM UTC+1, P.G.Taboada wrote:
>
> Thanks, this is what I was missing.
> I tried to use elemental, but could neither find formdata nor append...
>
> I am having troubles with the event listeners:
>
> final XMLHttpRequest xhr = Browser.getWindow().newXMLHttpRequest();
>> xhr.open("POST", "/upload");
>> xhr.setOnprogress(evt -> GWT.log("" + evt));
>> xhr.setOnabort(evt -> GWT.log("" + evt));
>> xhr.setOnerror(evt -> GWT.log("" + evt));
>> xhr.setOnreadystatechange(evt -> {
>> if (xhr.getReadyState() == XMLHttpRequest.DONE) {
>> try {
>> GWT.log("Received http response for request ");
>> String text = xhr.getResponseText();
>> if (text == null || text.isEmpty()) {
>> messageUi.setInnerText("no response");
>> } else {
>> messageUi.setInnerText(text);
>> }
>> } catch (Throwable e) {
>> GWT.log("Error", e);
>> }
>> }
>> });
>> final JsFormData formData = createFormData();
>> append(formData, "someFile", file);
>> xhr.send(formData);
>
>
>
> I get 4 times
>
> JsEventListener.java:42 Uncaught TypeError: this$static_0_g$.handleEvent
> is not a function
>
> Any idea?
>
>>
>>>
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