upload progress bar script
postFile('thumbnail' , 'progress-bar-thumbnail');
// "InputFile" & "ProgressBar" are ID of elements
function postFile(InputFile , ProgressBar) {
var formdata = new FormData();
formdata.append(InputFile, $('#'+InputFile)[0].files[0]);
let request = new XMLHttpRequest();
request.upload.addEventListener('progress', function (e) {
let file1Size = $('#'+InputFile)[0].files[0].size;
if (e.loaded <= file1Size) {
let percent = Math.round(e.loaded / file1Size * 100);
$('#'+ProgressBar).width(percent + '%').html(percent + '%');
}
if(e.loaded == e.total){
$('#'+ProgressBar).width(100 + '%').html(100 + '%');
}
});
// instead of '/admin/blog', write your form action
request.open('post', '/admin/blog');
request.timeout = 45000;
request.send(formdata);
}