display multiple image preview before uploading jquery code example

Example 1: how to show multiple image preview in jquery

function previewImages() {

  var preview = document.querySelector('#preview');
  
  if (this.files) {
    [].forEach.call(this.files, readAndPreview);
  }

  function readAndPreview(file) {

    // Make sure `file.name` matches our extensions criteria
    if (!/\.(jpe?g|png|gif)$/i.test(file.name)) {
      return alert(file.name + " is not an image");
    } // else...
    
    var reader = new FileReader();
    
    reader.addEventListener("load", function() {
      var image = new Image();
      image.height = 100;
      image.title  = file.name;
      image.src    = this.result;
      preview.appendChild(image);
    });
    
    reader.readAsDataURL(file);
    
  }

}

document.querySelector('#file-input').addEventListener("change", previewImages);

Example 2: upload multiple image using jquery

$('body').on('click', '#upload', function(e){
        e.preventDefault();
        var formData = new FormData($(this).parents('form')[0]);

        $.ajax({
            url: 'upload.php',
            type: 'POST',
            xhr: function() {
                var myXhr = $.ajaxSettings.xhr();
                return myXhr;
            },
            success: function (data) {
                alert("Data Uploaded: "+data);
            },
            data: formData,
            cache: false,
            contentType: false,
            processData: false
        });
        return false;
})