JSFiddle - React, Tailwind, and code Playground

HTML

<form onsubmit="return validateCheckboxes();">
  <h4>Which things do you enjoy?</h4>

  <input type='checkbox' name='2' value='12' id='2_12'>
  <label for='2_12'>&nbsp;&nbsp;Breathing</label><br />

  <input type='checkbox' name='2' value='13' id='2_13'>
  <label for='2_13'>&nbsp;&nbsp;Watching paint dry</label><br />

  <input type='checkbox' name='2' value='14' id='2_14'>
  <label for='2_14'>&nbsp;&nbsp;Nothing</label><br />
  <br />
  <br />
  <input type="button" value="Submit">
</form>

JavaScript

function validateCheckboxes() {
  if (document.querySelector('.2:checked')) {
    alert('something is checked');
    return true;
  } else {
    alert('NOTHING is checked');
    return false;
  }
};