how to perform some action before submit form via .ajaxForm()?

问题

i am using ajaxForm() frame work to send my data without reloading my page.

    $('#ReplayForm').ajaxForm({ 

      success : function(data){
             alert("Success");
       }   
    });  

now, i want to check some condition before submitting the form and if the condition is false then stop submission else continue.

is there any solution to do this work or is there any way buy which i can perform this operation. Thanks in advance.

回答1:

Yes, definatly you can handle this situation. you have to call beforesubmit method for this let see one example

$('#ReplayForm').ajaxForm({ 
         beforeSubmit : function(arr, $form, options){
             if("condition is true")
             {
                return true; //it will continue your submission.
             }
             else
             {
                               return false; //ti will stop your submission.
             }

          },
          success : function(data){
              endLoading();
              if(data.result=="success")            
              {
                  showSuccessNotification(data.notification);
              } 
              else
              {
                  showErrorNotification(data.notification);
              }
           }
   });  

回答2:

You can use the beforeSubmit option

$('#ReplayForm').ajaxForm({
    beforeSubmit: function (arr, $form, options) {
        //check your conditions and return false to prevent the form submission
        if (!valid) {
            return false;
        }
    },
    success: function (data) {
        alert("Success");
    }
});

回答3:

Use beforeSend option in JQuery AJAX framework, if the test fails return false should do it.

$('#ReplayForm').ajaxForm({ 

  success : function(data){
         alert("Success");
  },
  beforeSend: function() {
      if(!myFunc()) {
          return false;
      }
  }
});

来源：https://stackoverflow.com/questions/25970071/how-to-perform-some-action-before-submit-form-via-ajaxform