throwErrorIfJquerySelectorUndefined.js

throwErrorIfJquerySelectorUndefined.js

// anonymous func to avoid polluting global namespace, and $ conflict
(function($){

  // throw error for undefined selectors
  var jQueryInit = $.fn.init;
  $.fn.init = function(selector, context, rootjQuery) {
      var result = new jQueryInit(selector, context, rootjQuery);
      if (result.length === 0)
        throw "jQuery cannot find the following selector: '" + selector + "'";
      return result;
  };
  
  // USAGE
  // if anywhere is you code you try to find a selector with jQuery that is not found, like so:
  // $('undefinedselector');
  // you will get an error thrown in the console

})(window.jQuery);