JSFiddle - React, Tailwind, and code Playground

HTML

<form name="formUpload" id="formUpload" method="post">
    <label>Selecione o arquivo:
        <input type="file" name="arquivo" id="arquivo" size="45" />
        <input type='hidden' name='filename'/>
    </label>
    <br />
    <progress value="0" max="100"></progress><span id="porcentagem">0%</span>
    <br />
    <input type="button" id="btnEnviar" value="Enviar Arquivo" />
</form>

JavaScript

$(function(){
    
    // $('').click...
    
    $('#arquivo').on('change', function(){
        var filename = $(this).val();
        $('input[name="filename"]').val(filename);
        
        alert('Valor do campo hidden: ' + $('input[name="filename"]').val());
    });
})