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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