Simple jQuery file upload

 https://danielmg.org/demo/java-script/uploader/basic
https://github.com/danielm/uploader
Simple js progress bar (have some bootstrap style)
/*
 * Some helper functions to work with our UI and keep our code cleaner
 */
//--------------- UI
// Adds an entry to our debug area


function ui_add_log(message, color) {
    var d = new Date();


    var dateString = (('0' + d.getHours())).slice(-2) + ':' +
        (('0' + d.getMinutes())).slice(-2) + ':' +
        (('0' + d.getSeconds())).slice(-2);


    color = (typeof color === 'undefined' ? 'muted' : color);


    var template = jQuery33('#debug-template').text();
    template = template.replace('%%date%%', dateString);
    template = template.replace('%%message%%', message);
    template = template.replace('%%color%%', color);


    // jQuery33('#debug').find('li.empty').fadeOut(); // remove the 'no messages yet'
    // jQuery33('#debug').prepend(template);
    jQuery33('#files').append(template);
}


function ui_add_log2(message, color) {
    var d = new Date();


    var dateString = (('0' + d.getHours())).slice(-2) + ':' +
        (('0' + d.getMinutes())).slice(-2) + ':' +
        (('0' + d.getSeconds())).slice(-2);


    color = (typeof color === 'undefined' ? 'muted' : color);


    var template = jQuery33('#debug-template').text();
    template = template.replace('%%date%%', dateString);
    template = template.replace('%%message%%', message);
    template = template.replace('%%color%%', color);


    jQuery33('#debug').find('li.empty').fadeOut(); // remove the 'no messages yet'
    jQuery33('#debug').prepend(template);
    // jQuery33('#files').append(template);
}


// Creates a new file and add it to our list
function ui_multi_add_file(id, file) {
    var template = jQuery33('#files-template').text();
    template = template.replace('%%filename%%', file.name);


    template = jQuery33(template);
    template.prop('id', 'uploaderFile' + id);
    template.data('file-id', id);


    jQuery33('#files').find('li.empty').fadeOut(); // remove the 'no files yet'
    jQuery33('#files').append(template);
}


// Changes the status messages on our list
function ui_multi_update_file_status(id, status, message) {
    jQuery33('#uploaderFile' + id).find('span').html(message).prop('class', 'status text-' + status);
}


// Updates a file progress, depending on the parameters it may animate it or change the color.
function ui_multi_update_file_progress(id, percent, color, active) {
    color = (typeof color === 'undefined' ? false : color);
    active = (typeof active === 'undefined' ? true : active);


    var bar = jQuery33('#uploaderFile' + id).find('div.progress-bar');


    bar.width(percent + '%').attr('aria-valuenow', percent);
    bar.toggleClass('progress-bar-striped progress-bar-animated', active);


    if (percent === 0) {
        bar.html('');
    } else {
        bar.html(percent + '%');
    }


    if (color !== false) {
        bar.removeClass('bg-success bg-info bg-warning bg-danger');
        bar.addClass('bg-' + color);
    }
}


// config
jQuery33(function () {
    /*
     * For the sake keeping the code clean and the examples simple this file
     * contains only the plugin configuration & callbacks.
     */
    jQuery('#drag-and-drop-zone').dmUploader({
        url: 'uploadMediaFile',
        fieldName: 'file_upload',
        maxFileSize: max_upload_size,
        extraData: function() {
            return {
                "folderId": id_folder_selected,
            }
        },
        // allowedTypes: "*",
        extFilter: extFilter,
        onDragEnter: function () {
            // Happens when dragging something over the DnD area
            this.addClass('active');
        },
        onDragLeave: function () {
            // Happens when dragging something OUT of the DnD area
            this.removeClass('active');
        },
        onInit: function () {
            // Plugin is ready to use
            // ui_add_log('Penguin initialized :)', 'info');
        },
        onComplete: function () {
            // All files in the queue are processed (success or error)
            // ui_add_log('All pending tranfers finished');
        },
        onNewFile: function (id, file) {
            // When a new file is added using the file selector or the DnD area
            // ui_add_log('New file added #' + id);
            ui_multi_add_file(id, file);
        },
        onBeforeUpload: function (id) {
            // about tho start uploading a file
            // ui_add_log('Starting the upload of #' + id);
            ui_multi_update_file_status(id, 'uploading', 'Uploading...');
            ui_multi_update_file_progress(id, 0, '', true);
        },
        onUploadCanceled: function (id) {
            // Happens when a file is directly canceled by the user.
            ui_multi_update_file_status(id, 'warning', 'Canceled by User');
            ui_multi_update_file_progress(id, 0, 'warning', false);
        },
        onUploadProgress: function (id, percent) {
            // Updating file progress
            ui_multi_update_file_progress(id, percent);
        },
        onUploadSuccess: function (id, data) {
            // A file was successfully uploaded
            ui_add_log('Server Response for file #' + id + ': ' + JSON.stringify(data));
            let response = JSON.stringify(data);
            console.log(response);
            if (typeof response.status == 'undefined') {
                console.log('no status');
                ui_multi_update_file_status(id, 'danger', response.message);
                ui_multi_update_file_progress(id, 0, 'danger', false);
                // console.log(response.status);
            } else {
                if (!response.status) {
                    console.log('status 0');
                } else {
                    ui_multi_update_file_status(id, 'success', 'Upload Complete');
                    ui_multi_update_file_progress(id, 100, 'success', false);
                }
            }




            // ui_add_log('Upload of file #' + id + ' COMPLETED', 'success');
            
        },
        onUploadError: function (id, xhr, status, message) {
            ui_multi_update_file_status(id, 'danger', message);
            ui_multi_update_file_progress(id, 0, 'danger', false);
        },
        onFallbackMode: function () {
            // When the browser doesn't support this plugin :(
            ui_add_log('Plugin cant be used here, running Fallback callback', 'danger');
        },
        onFileSizeError: function (file) {
            ui_add_log('File \'' + file.name + '\' cannot be added: size excess limit', 'danger');
        },
        onFileExtError: function (file) {
            ui_add_log('File \'' + file.name + '\' cannot be added: file type not allowed', 'danger');
        },
    });
});

Blue IMP

https://stackoverflow.com/questions/16552518/how-to-call-uploadhandler-php-with-php-blueimp-jquery-file-upload

https://stackoverflow.com/questions/17451482/blueimp-file-upload-single-file-upload