New formdata jquery

In jQuery, the FormData object is a way to send form data to a server in a structured format, similar to how you would send a JSON object. Here's an example of how to use it:

Creating a new FormData object

var formData = new FormData();

Adding form data to the FormData object

You can add form data to the FormData object using the append() method:

formData.append('name', 'John Doe');
formData.append('age', 30);
formData.append('file', fileInput.files[0]);

In this example, we're adding three form data fields: name, age, and file. The file field is a file input field, and we're getting the selected file using the files property.

Sending the FormData object to the server

You can send the FormData object to the server using the ajax() method:

$.ajax({
  type: 'POST',
  url: '/upload',
  data: formData,
  processData: false,
  contentType: false,
  success: function(data) {
    console.log(data);
  }
});

In this example, we're sending the FormData object to the /upload endpoint using a POST request. We're setting processData to false and contentType to false to tell jQuery not to process the data as a string and not to set the Content-Type header to application/x-www-form-urlencoded.

Note: When sending a FormData object, you should set processData to false and contentType to false to ensure that the data is sent correctly.

Example with a form

<form id="myForm">
  <input type="text" name="name" value="John Doe">
  <input type="number" name="age" value="30">
  <input type="file" name="file">
</form>

$('#myForm').submit(function(event) {
  event.preventDefault();
  var formData = new FormData(this);
  $.ajax({
    type: 'POST',
    url: '/upload',
    data: formData,
    processData: false,
    contentType: false,
    success: function(data) {
      console.log(data);
    }
  });
});

In this example, we're creating a FormData object from the form elements using the FormData() constructor and passing the form element as an argument. We're then sending the FormData object to the server using the ajax() method.