为什么将<form>与jquery一起使用

Question

If I am writing an application where I can dictate that the users must have a modern browser with javascript enabled, what is the benefit of using the html tag.

For instance if I submit all of my "forms" by doing something like this, but I don't actually have any form tags in my html. I just build a datalist to pass through the data parameter of the $.ajax call

$('#submit_form').click(function(){
   var datalist='foo='+$('#foo').val();
   $.ajax({
     // ajax json here
   });
}

Why would I use the form tag in my html code? I am sure there is probably a good reason, but a friend asked me the other day and I couldn't give him a good reason why it was needed.

Answer 1

1. Your server side fallback will cause the form to continue to work if the JavaScript fails for some reason other than "the user has turned it off" (such as a network interruption)
2. Having the fields logically grouped in a form will make them more easily navigable in most screen reader software.