The method of setSendAllOnUnload from AjaxAppender seems not to work

[Johnny Santos]

I'm trying to do this simple test:

var log = log4javascript.getLogger('LeitorLogger');
var ajaxAppender = new log4javascript.AjaxAppender(loggingURL);
var jsonLayout = new log4javascript.JsonLayout()
ajaxAppender.setSendAllOnUnload(true);
console.log(ajaxAppender.isSendAllOnUnload());
ajaxAppender.setLayout(jsonLayout);
log.addAppender(ajaxAppender);
log.info("Hello World");

But the ajax request occurs immediately when i load the page. Can anyone tell me what is wrong?