simpleProgress.js

function progress () {
    let progressBar = document.getElementById ('progress');
    let percentCount = document.getElementById ('percentcount');
    let vc_label_units = document.getElementById ('vc_label_units');
    
    let counter = 5;
    let progress = 25;

    let id =  setInterval (frame, 50);

    function frame () {
        if (progress == 500 && counter == 100) {
            clearInterval (id);
        } else {
            progress += 5;
            counter += 1;
            progressBar.style.width = progress + 'px';
            percentCount.innerHTML = counter + '%';
            vc_label_units.innerHTML = counter + '%';
        }
    }
}

progress ();