Uploading Files With AJAX
I can’t seem to reach the end of the fun stuff you can do with web technologies. Today, I’m going to show you how to upload files via AJAX. First, we'll see how to upload files using vanilla JavaScript. And later on, I'll show how you could use the DropzoneJS library to implement drag-and-drop file uploads. Looking for a Quick Solution? If you're looking for a quick solution, there's a great collection of file upload scripts and applications over at CodeCanyon. How to Upload a File With Vanilla JavaScript There are three main components to our project. The multiple attribute on the file input element. The FileReader object from the new File API. The FormData object from XMLHttpRequest . We use the multiple attribute to allow the user to select multiple files for upload (multiple file upload will work normally even if FormData isn’t available). As you’ll see, FileReader allows us to show the user thumbnails of the files they’re uploading (w