How to Implement AJAX File Upload with FormData Using Drag and Drop?
Dec 18, 2024 pm 08:37 PM
AJAX File Upload with FormData
Problem:
Using FormData for file upload in an AJAX request with dynamic HTML generated using drag and drop functionality.
HTML Code:
<form>
JavaScript Code:
$('.wpc_contact').submit(function(event) {
var form = $('.wpc_contact').serialize();
var formname = $('.wpc_contact').attr('name');
var FormData = new FormData($(form)[1]);
$.ajax({
url: '<?php echo plugins_url(); ?>/wpc-contact-form/resources/js/tinymce.php',
data: { form: form, formname: formname, FormData: FormData },
type: 'POST',
processData: false,
contentType: false,
success: function(data) {
alert(data);
}
});
});
Solution:
To correctly use FormData, follow these steps:
1. Preparation:
-
Use the standard JavaScript object 'form' to pass the entire form to FormData():
var form = $('form')[0]; var formData = new FormData(form); -
Alternatively, specify specific data to FormData():
var formData = new FormData(); formData.append('file', $('input[type=file]')[0].files[0]);
2. Sending the Form:
Use jQuery AJAX request with these options:
$.ajax({
url: 'Your url here',
data: formData,
type: 'POST',
contentType: false, // Required
processData: false, // Required
// ... Other options like success, etc.
});
Note:
- Type "POST" in options is necessary as all files must be sent via POST request.
- contentType: false is only available in jQuery version 1.6 and onwards.
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