Send input files data with ajax

var formData = new FormData(this);
debugger;
$.ajax({
  url: formURL,
  type: 'POST',
  data: formData,
  mimeType: "multipart/form-data",
  contentType: false,
  cache: false,
  processData: false,
  success: function (data, textStatus, jqXHR) {
    debugger;
  },
  error: function (jqXHR, textStatus, errorThrown) {
                    
  }
});

The above code will help you post content plus files in one submit call.

The post method parameter should include HttpPostedFileBase[] file so the list of files will appear in this file parameter

Modern browsers that support the HTML5 file stuff have in the <input> element a "files" property. That will give you a file list reference, which has a length property.

As the property is already an array so you just need to access it or iterate through it.

JS

var input = document.getElementById('id');
console.log(input.files);

for (var i = 0; i < input.files.length; i++) {
 console.log(input.files[i]);
}

Use the code below.

var formData = new FormData($("#formid")[0]);
jQuery.ajax({
  url: 'insertfiles.php',
  type: "POST",
  data: formData,
  success: function(data) {
        
  },
  error: function(data) {
    alert( 'Sorry.' );
  },
  cache: false,
  contentType: false,
  processData: false,
});

Hope this helps you