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

问题

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?

回答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>

回答2:

If you just want to disable them after one click then this should do..

 <form action="" name="formName">
            <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>

Onclick event

$("input:radio[name=level]").click(function(){
    var radios = document.formName.level;

        for (var i=0, iLen=radios.length; i<iLen; i++) {
          radios[i].disabled = true;
        } 
});

Here is a fiddle Click here

回答3:

You can do it with plain javascript.

var buttons = document.getElementsByName('level');

for(var i = 0; i < buttons.length; i++)
{
    buttons[i].onclick = function()
    {
    	for(var j = 0; j < buttons.length; j++)
        {
            if(j != i)
            {
                buttons[j].setAttribute('disabled', 'true');
            }
        }
    }
}

Also I would get rid of the <form> tag since it serves no purpose here.

来源：https://stackoverflow.com/questions/33287230/after-selecting-one-radio-button-i-want-the-remaining-buttons-to-become-disable

标签

javascript

html

dom

radiobuttonlist