Final answer:
To update the progress bar every 200 milliseconds using the setinterval() function, you can write a code that uses the setInterval() function with a loop to increment the value of the progress bar element by 1 every 200 milliseconds.
Step-by-step explanation:
To update a progress bar every 200 milliseconds using the setinterval() function, you can write the following code:
setInterval(function() { 
 // Get the progress bar element 
 var progressBar = document.getElementById('progress-bar'); 
 // Update the value of the progress bar 
 progressBar.value += 1; 
}, 200);
In this code, we use the setInterval() function with a loop that increments the value of the progress bar element by 1 every 200 milliseconds.