如何通过Bootstrap forms获取表单数据并转换为JSON

 ```javascript

 function getFormData() {

   var formData = {};

   $('form input, form select, form textarea').each(function() {

     formData[$(this).attr('id')] = $(this).val();

   });

   return JSON.stringify(formData);

 }

 ```

 ```javascript

 function getFormData() {

   var formData = {};

   var elements = document.querySelectorAll('form input, form select, form textarea');

   for (var i = 0; i < elements.length; i++) {

     formData[elements[i].id] = elements[i].value;

   }

   return JSON.stringify(formData);

 }

 ```