can i send ajax request in the page to take screenshot?

[VincentWang1009]

I have a js file

webshot(fileContent,'test.png',{siteType:'html', renderDelay: 5000},function(err){
    console.log('finish');
});

fileContent is the file that I want to take screenshot,In this html I have a ajax request ($.ajax) ,but when I run this script, it seems something error occur (both success callback and fail callback did not run).when I run that page in a real browser,it works fine.