How to preview an image before and after upload in HTML and JavaScript?

To preview an image before and after upload, you need to try the following code − HTML

The following is the jQuery −

function display(input) {
   if (input.files && input.files[0]) {
      var reader = new FileReader();
      reader.onload = function(event) {
         $('#myid').attr('src', event.target.result);
      }
      reader.readAsDataURL(input.files[0]);
   }
}

$("#demo").change(function() {
   display(this);
});