What is the correct way to check if a java object is not null in javascript?
Exampe:
private native performIntern(JsArray<? extends Element> elements, int
duration, JavaScriptObject options, HasOnComplete command) /*-{
var func = null;
if (typeof command !== 'undefined') {
func = function() {
comma...@com.bla.HasOnComplete::onComplete()();
}
}
return $wnd._CMod.perform(elements, duration, options, func);
}-*/;
It will never enter the if if the command isn't null :(..
I also tried things like "if (command)" or first assign command to another
variable... but no luck and can't seem to find a matching example in code
some where. I noticed that GWT uses a global function "defined()" in for
example JavaScriptObject, but no idea where to find the source.
BTW: the if is entered if I do something like "if (duration > 0)"..... such
that the command is called...
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