JSFiddle - React, Tailwind, and code Playground

HTML

<div class="container">
	<button data-target='foo'>foo</button>
	<button data-target='bar'>bar</button>
</div>

JavaScript

(function($){
		var foo='foo_value';
		var bar='bar_value';

		function getVar(theVar){
      console.log(this[foo]);
      console.log(this[bar]);
      //the code...
		}		

		$('.container').on('click', 'button', function(){
			getVar(this.dataset.target);
		})
	}(jQuery))