JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<input class="tf w-input" id="node" maxlength="256" placeholder="Vida nocturna, el aeropuerto " type="text">

<a class="btn desc fav w-button" id="parquebp" name="parque" onclick = "add(this);" >PARQUE</a> 

<a class="btn desc fav w-button" id="parque" name="parque" onclick = "add(this);">CENTRO COMERCIAL</a>

<a class="btn desc fav w-button" id="parque" name="parque" onclick = "add(this);">GYM</a>

JavaScript

$(function(){
	$('.fav').click(function(){
  	//$("#node").val($(this).html());
  	var node = $("#node").val();
  	$("#node").val(node +","+ $(this).html()); 
  })
})