JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
<input type="text" value="inputValue" id="jj - j" />
<button id="clickID" >Click</button>

JavaScript

$("#clickID").on('click', function(){
	getVal=$(document.getElementById('jj - j')).val();
  console.log(getVal);
});