JSFiddle - React, Tailwind, and code Playground

by Artur Soul

HTML

<label>
 <div class="checker">
 <span class=""><input type="checkbox" name="UnitTag[197][tagId]" value="197"></span>
 </div>
 Окончание на грудь (доп.)
 </label>

JavaScript

$('label').on('change', function(){

	    let input = $(this).find('input[type=checkbox]');

	    if(input.prop('checked') === false){
      	alert('yes');
      } else {
      	alert('nope');
      }
    });