Vaadin execCommand

window.com_github_mcollovati_vaadin_ClipboardCopy = function() {
    var me = this;
    var el = me.getElement(me.getParentId());
    el.onclick = function() {
        console.log("exec copy");
        document.execCommand('copy');
        console.log("exec copy dones");
    }
}


@JavaScript("copy.js")
public class ClipboardCopy extends AbstractJavaScriptExtension {

    private ClipboardCopy(AbstractClientConnector target) {
        super(target);
    }

    static ClipboardCopy extend(Button button) {
        return new ClipboardCopy(button);
    }
}


public class MyUI extends UI {
  protected void init(VaadinRequest vaadinRequest) {
     ...
    Button copy = new Button("Copy");
    ClipboardCopy.extend(copy);     
     ...
  }
}