XHR va FORM submit

Khi gui request tu server dung XHR request (nhu jquery AJAX, axios...) thi phai tra ve su dung

res.send(someJavascriptObject)

neu tra ve kieu

res.redirect('/path/to/some/page')
res.render('view_file')

thi se tra ve ca trang web, nhung se khong hien thi len tren trinh duyet duoc

Chi co gui request theo dang FORM submit du lieu thi moi duoc tra ve

res.redirect('/path/to/some/page')
res.render('view_file')