list-input-files.js

(function ($) {

    'use strict';

    function listInputFiles() {
        $('input[type=file]').change(function () {
            // remove any existing files first
            $(this).siblings('.form__file').remove();
            for (let i = 0; i < $(this)[0].files.length; ++i) {
                $(this).parents('.form__item').prepend(`
                    <p class="form__file">${$(this)[0].files[i].name}</p>
                `);
            }
        });
    }

    // Show list of selected files for upload on input[type=file]
    listInputFiles();

})(jQuery);