JSFiddle - React, Tailwind, and code Playground

HTML

<br />Apples
                <input type="checkbox" name="fruit" checked/>Oranges
                <input type="checkbox" name="fruit" />Mango
                <input type="checkbox" name="fruit" />

                <br />Yes
<input type="radio" name="yesorno" id="yes" onClick="checkboxes();" />

JavaScript

function checkboxes()
      {
       var inputElems = document.getElementsByTagName("input"),
        count = 0;
          
        for (var i=0; i<inputElems.length; i++) {       
if (inputElems[i].type == "checkbox" && inputElems[i].checked == true) 
{
    count++;
    alert(count);
}

}}