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JavaScript

Posted by Shon Levi
Shon Levi
6,036 Points

Can't understand AJAX checking

Hey you all, just finished Ajax Course and have a question...

If I want to make form in Ajax, in the vidoes he just explain how to make the submition but he didn't explain how to check the form...

This is how far I got:

$("#form").submit(function(evt) {
    evt.preventDefault();
    var url = $(this).attr("action");
    $.ajax(url, {
        method : "POST",
        data : $("#add_task").serialize(),
        success : function(response){
            ?????
        }
    });
});

I need to check for example if the email the user is enter is valid... how can I do that?!

Thanks all

BTW - How I make a code section in the forum here I can't do nothing but make tabs for make this up?!

1 Answer

jack AM
jack AM
2,618 Points

Hey Shon,

There are a bunch of ways to do what you want, here is a way that is pretty straight forward...

$("#form").submit(function(evt) {
    evt.preventDefault();

    if (!checkFormFields()) {

      //show your error message to user...
      alert('All fields required.');

    } else {

      var url = $(this).attr("action");
      $.ajax(url, {
          method : "POST",
          data : $("#add_task").serialize(),
          success : function(response){

          }
      });
    }
});

//your form checking here...
function checkFormFields() {
  return $("#username").val() !== '';
}

So basically all I did was wrap your ajax call inside the if else statement, if the form doesn't pass the validation test, then the ajax call doesn't happen.