After selecting one radio button, I want the remaining buttons to become disabled

Question

I am working on a pong game in java script where one can change the difficulty level using a set of radio buttons

<form action="">
        <input type="radio" name="level" value="8">Beginner<br> 
        <input type="radio" name="level" value="4">Intermediate<br>
        <input type="radio" name="level" value="2">Pro<br>        
      </form>

The level adjusts well on the first try but when someone clicks on another radio button the game court is affected and keeps on refreshing. I am using html 5 and set the fps to 60. What I wanted is after a new page refresh, when one selects one radio button, the remaining buttons should become disabled till the user refreshes the page. Is there a way to do this in vanilla js?

Answer 1

You can loop over radio buttons collection and change their disabled status on change event. For example like this:

var radios = [].slice.call(document.querySelectorAll('input[name=level]'));

radios.forEach(function(radio) {
    radio.addEventListener('change', function() { 
        radios.forEach(function(r) {
            r.disabled = r !== radio;
        });
    });
});

<form action="">
  <input type="radio" name="level" value="8">Beginner<br>
  <input type="radio" name="level" value="4">Intermediate<br>
  <input type="radio" name="level" value="2">Pro<br>
</form>