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With the Dropzone.js script you can easily implement drag and drop file upload functionality on your website.
But by default, it only allows file uploading with no file removal option.
For enabling the remove link following with the uploaded file preview require to explicitly initialize the dropzone and define the options.
You can allow multiple file selections by creating more than one file element but you can easily do this with just a single file element.
It consumes less space and easy to handle but for this, you need to customize the element.
In this tutorial, I am using AngularJS and PHP to upload multiple files to the servers.
I am creating a custom directive to handle file selection in AngularJS.
With the use of AJAX, you can easily upload the selected file to your server and show a preview of it.
If you like to add a remove button to delete the file without page load then you again need to use AJAX to remove the file from the server.
I am using PHP to handle AJAX request on the server-side.
On WordPress, you have noticed that while writing a blog post it will autosave the post as a draft after a specific interval.
In this tutorial, I am creating a similar type of functionality with jQuery and AJAX. Where I check for any value update in the input element if it is then set an interval of 5 seconds.
Send an AJAX request to save data when the interval gets completed.
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