So, you were doing some odd things (like using a global variable with an integer assigned to it that I'm assuming you were using to keep track of your objects).
I've cleaned up what you had going on, and removed some redundant functions. Essentially, you needed to better utilize the JavaScript FileReader() function. You'll need to take a closer look at your buttons; as I didn't fix them for you. ;)
What you needed to do was iterate through your this.files array, and display the results using the FileReader() function. Code below.
$('#add_more').click(function() {
"use strict";
$(this).before($("<div/>", {
id: 'filediv'
}).fadeIn('slow').append(
$("<input/>", {
name: 'file[]',
type: 'file',
id: 'file',
multiple: 'multiple',
accept: 'image/*'
})
));
});
$('#upload').click(function(e) {
"use strict";
e.preventDefault();
if (window.filesToUpload.length === 0 || typeof window.filesToUpload === "undefined") {
alert("No files are selected.");
return false;
}
// Now, upload the files below...
// https://developer.mozilla.org/en-US/docs/Using_files_from_web_applications#Handling_the_upload_process_for_a_file.2C_asynchronously
});
function deletePreview(ele, i) {
"use strict";
try {
$(ele).parent().remove();
window.filesToUpload.splice(i, 1);
} catch (e) {
console.log(e.message);
}
}
$("#file").on('change', function() {
"use strict";
// create an empty array for the files to reside.
window.filesToUpload = [];
if (this.files.length >= 1) {
$("[id^=previewImg]").remove();
$.each(this.files, function(i, img) {
var reader = new FileReader(),
newElement = $("<div id='previewImg" + i + "' class='abcd'><img /></div>"),
deleteBtn = $("<span class='delete' onClick='deletePreview(this, " + i + ")'>delete</span>").prependTo(newElement),
preview = newElement.find("img");
reader.onloadend = function() {
preview.attr("src", reader.result);
preview.attr("alt", img.name);
};
try {
window.filesToUpload.push(document.getElementById("file").files[i]);
} catch (e) {
console.log(e.message);
}
if (img) {
reader.readAsDataURL(img);
} else {
preview.src = "";
}
newElement.appendTo("#filediv");
});
}
});
#formdiv {
text-align: center;
}
#file {
color: green;
padding: 5px;
border: 1px dashed #123456;
background-color: #f9ffe5;
}
#img {
width: 17px;
border: none;
height: 17px;
margin-left: -20px;
margin-bottom: 191px;
}
.upload {
width: 100%;
height: 30px;
}
.abcd {
text-align: center;
position: relative;
}
.abcd img {
height: 200px;
width: 200px;
padding: 5px;
border: 1px solid rgb(232, 222, 189);
}
.delete {
color: red;
font-weight: bold;
position: absolute;
top: 0;
cursor: pointer
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="formdiv">
<div id="filediv">
<input type="file" id="file" name="files[]" multiple="multiple" accept="image/*" title="Select Images To Be Uploaded">
<br>
</div>
<input type="button" id="add_more" class="upload" value="Add More Images" />
<input type="submit" name="submit" value="Add Product" class="upload" id="upload" title="Add Product To The Inventory">
</div>
